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Switched Mode Power Supply patents

      

This page is updated frequently with new Switched Mode Power Supply-related patent applications.




 Control unit for a led assembly and lighting system patent thumbnailControl unit for a led assembly and lighting system
A control unit for a led assembly includes a first and second led unit, the led units being serial connected. The led assembly, in use, is powered by a switched mode power supply.
Eldolab Holding B.v.


 Switched mode power supply control patent thumbnailSwitched mode power supply control
An illustrative example embodiment of a method is for controlling a switch. The switch is used to charge a capacitor that provides an output voltage.

 Variable power energy harvesting system patent thumbnailVariable power energy harvesting system
The disclosed invention provides examples of preferred embodiments including systems for harvesting energy from variable output energy harvesting apparatus. The systems include energy harvesting apparatus for providing energy input to a switched mode power supply and a control loop for dynamically adjusting energy harvesting apparatus input to the switched mode power supply, whereby system output power is substantially optimized to the practical.

 Switched mode power supply compensation loop patent thumbnailSwitched mode power supply compensation loop
A controller, and related method, configured to generate a duty cycle control signal for controlling an output voltage of a switched mode power supply as a function of a reference signal. In one embodiment, the controller is configured to sample a signal indicative of the output voltage to generate a first sampled signal, filter out a ripple component of the first sampled signal to generate a filtered signal, and generate a feedback control signal based on the filtered signal.
Telefonaktiebolaget Lm Ericsson (publ)


 Systems and methods of non-invasive continuous adaptive tuning of digitally controlled switched mode power supply based on measured dynamic response patent thumbnailSystems and methods of non-invasive continuous adaptive tuning of digitally controlled switched mode power supply based on measured dynamic response
Example embodiments of the systems and methods of non-invasive continuous adaptive tuning of digitally controlled switched mode power supply based on measured dynamic response disclosed herein rely on time domain measurements for the tuning rather than on frequency response to automatically tune the system for stability and good dynamic performance. In particular, an algorithm directly measures overshoot and settling time to transients.
Texas Instruments Incorporated


 Multi-output regulator with joint feedback patent thumbnailMulti-output regulator with joint feedback
A multi-output switched mode power supply may include a power circuit and a controller to control the power circuit. A combiner circuit may produce a single feedback signal based on the regulated output voltages produced by the switched mode power supply..
Viasat, Inc.


 Thd in off-line converters patent thumbnailThd in off-line converters
A switched mode power supply (smps) receives an input voltage selectively connects and disconnects the input voltage from an inductor. The smps generates a charge in the inductor during a duty cycle portion while the input voltage is connected by generating control signals for selectively connecting to and disconnecting the input voltage from the inductor.
Semiconductor Components Industries, Llc


 Envelope tracking modulator with feedback patent thumbnailEnvelope tracking modulator with feedback
There is disclosed an envelope tracking modulated supply arranged to generate a modulated supply voltage in dependence on a reference signal, comprising a low frequency path for tracking low frequency variations in the reference signal and including a switched mode power supply, a correction path for tracking high frequency variations in the reference signal and including a linear amplifier, a feedback path from the output of the linear amplifier to the input of the linear amplifier, and a combiner for combining the output of the switched mode power supply and the output of the linear amplifier to generate a modulated supply voltage.. .
Snaptrack, Inc.


 Switched mode power supply converter patent thumbnailSwitched mode power supply converter
A method and apparatus for switched mode power supply (smps) system includes circuitry configured to produce a voltage output based on an input voltage, the smps circuitry includes inductive, capacitive and switching elements configured to generate the voltage output. The switching elements include at least one set of cascode coupled devices, each set of cascode coupled devices including a high electron mobility transistor (hemt) and one of a diode and a field effect transistor (fet) in a cascode coupling.
Semiconductor Components Industries, Llc


 Isolated buck converter, switched mode power supply, and  transferring digital data from a primary side to an isolated secondary side of an isolated buck converter patent thumbnailIsolated buck converter, switched mode power supply, and transferring digital data from a primary side to an isolated secondary side of an isolated buck converter
An isolated buck converter for converting an analog input voltage to an analog output voltage is capable of transferring digital data from the primary side to the secondary side. The converter comprises, on a primary side, a primary winding and a non-isolated buck connected in series, and a pair of switches switchable between a forward phase and a fly-buck phase.
Telefonaktiebolaget Lm Ericsson (publ)


Switched mode power supply compensation loop

There is provided a controller for controlling an output current of a switched mode power supply, smps. The controller comprises a sampling module arranged to sample a signal indicative of the output current of the smps at a frequency higher than a switching frequency of the smps, and a filter module arranged to filter out a ripple component of the sampled signal.
Telefonaktiebolaget Lm Ericsson (publ)

Electromagnetic flow sensor interface including sensor drive circuit

An interface circuit to an electromagnetic flow sensor is described. In an example, it can provide a dc coupled signal path from the electromagnetic flow sensor to an analog-to-digital converter (adc) circuit.
Analog Devices Global

Electromagnetic flow sensor interface allowing differential dc coupling

An interface circuit to an electromagnetic flow sensor is described. In an example, it can provide a dc coupled signal path from the electromagnetic flow sensor to an analog-to-digital converter (adc) circuit.

Electromagnetic flow sensor interface allowing dc coupling

An interface circuit to an electromagnetic flow sensor is described. In an example, it can provide a dc coupled signal path from the electromagnetic flow sensor to an analog-to-digital converter (adc) circuit.

Systems and methods of non-invasive continuous adaptive tuning of digitally controlled switched mode power supply based on measured dynamic response

Example embodiments of the systems and methods of non-invasive continuous adaptive tuning of digitally controlled switched mode power supply based on measured dynamic response disclosed herein rely on time domain measurements for the tuning rather than on frequency response to automatically tune the system for stability and good dynamic performance. In particular, an algorithm directly measures overshoot and settling time to transients.

Converter with hysteretic control

A hysteretic power converter constituted of: a switched mode power supply comprising an inductor, an electronically controlled switch and an output capacitor, the switch arranged to alternately open and close a loop with the inductor and a power source; a hysteretic comparator, a first input coupled to a feedback connection and arranged to receive from the feedback connection a feedback signal providing a first representation of the voltage across the output capacitor, the electronically controlled switch opened and closed responsive to an output of the hysteretic comparator; a reference voltage source arranged to generate a reference voltage, the generated reference voltage coupled to a second input of the hysteretic comparator; and a voltage coupler, the voltage coupler arranged to couple a second representation of the voltage across the output capacitor to the second input of the hysteretic comparator, such that the second representation is added to the generated reference voltage.. .
Microsemi Corporation

Switched mode power supply circuit

An smps (switched mode power supply) circuit includes a first switch element, a second switch element, an inductor, a capacitor, a current sensor, a current comparator, and a controller. The first switch element is coupled between a first power node and a switch node.
Mediatek Inc.

Switched mode power supply driver integrated with a power transmission antenna

A driver comprising a switched mode power supply, wherein said switched mode power supply comprises an existing coil, the driver circuit further comprises: a first power transmission antenna (42) formed as a first coil which is either the existing coil of the switched mode power supply or coupled to the existing coil of the switched mode power supply, said first power transmission antenna (42) is adapted for being magnetically coupled to a second power receiving antenna (44) thereby forming a wireless power transmitter.. .
Philips Lighting Holding B.v.

Power supply for led lamp with triac dimmer

A bleeder circuit is provided in a switched mode power supply (smps) that provides a compensation current when the loop current drops below the holding current of the triac to alleviate light flickering problem. Further, automatic power factor correction is also provided in embodiments of the invention, which enables the output current to be in phase with the input voltage.
Bcd Semiconductor Manufacturing Limited

Hvac components having a variable speed drive with optimized power factor correction

A power factor optimized variable speed drive unit for an electric motor of an hvac device is disclosed. In an embodiment, the unit includes a selectively-activatable power factor correction unit operatively associated with a switched mode power supply unit.
Trane International Inc.

Method of operating a switched mode power supply, computer program, and switched mode power supply

A method of operating a switched mode power supply comprising a switched mode converter and a control arrangement. The switched mode converter converts an input voltage to an output voltage and includes a primary winding, controllable switch based circuitry connecting the input voltage over the primary winding, a secondary winding coupled to the primary winding, and an lc filter including an inductive element and a capacitive element, wherein the output voltage is obtained as the voltage over the capacitive element and a duty cycle of the switched mode converter can be controlled by controlling the switch based circuitry.
Telefonaktiebolaget L M Ericsson (publ)

Switched mode power supply, base station, and operating a switched mode power supply

A switched mode power supply comprising a switched mode converter and a controller for controlling the switched mode converter, the switched mode converter being provided for converting an input voltage to an output voltage and including, on a primary side, a primary winding and a controllable switch based circuitry connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding coupled to the primary winding and a capacitive element connected over the secondary winding, wherein the output voltage is obtained as the voltage over the capacitive element. The primary winding comprises a first winding portion and at least one further winding portion and the switch based circuitry comprises controllable switches capable of controlling the duty cycle of the switched mode converter and capable of switching between a first operation state wherein the input voltage is connected only over the first winding portion and at least a second operation state wherein the input voltage is connected over the first and the at least one further winding portions, thereby enabling switching between two different transformer ratios.
Telefonaktiebolaget L M Ericsson (publ)

Switched mode power supply with efficient operation at light loads and method therefor

A switched mode power supply includes an active clamp flyback converter having an input for receiving an input voltage, and an output for providing a regulated voltage, the active clamp flyback converter having a first switch for controlling a flow of current through a primary winding of a flyback transformer, and a second switch for clamping a switch node on a primary side of the flyback transformer, and a controller for controlling the first and second switches to operate the active clamp flyback converter in an active clamp flyback mode when a load current is above a first predetermined level, and for controlling the first and second switches to operate the active clamp flyback converter in a discontinuous conduction mode with a variable switching frequency when the load current is below a second predetermined level.. .
Semiconductor Components Industries, Llc

Combinatorial/sequential pulse width modulation

A number of standard pwm generators produce pwm signals that may be used to drive the power stages for full-bridge, feed-forward, push-pull, phase-shift zero voltage transition (zvt), and other switched mode power supply (smps) conversion topologies. These pwm signals may be fed to logic functions of a combinatorial logic block.
Microchip Technology Incorporated

Switched mode power supply having a staircase current limit

Disclosed is switching power supply that includes a pulse frequency modulation (pfm) mode of operation current feedback control. A reference current source is configured to output a reference current at one of several selectable levels.
Qualcomm Incorporated

Three input comparator

A three input voltage comparator provides termination of a pulse width modulation (pwm) output in a switched mode power supply. Shutdown of the pwm signal occurs when a sense current from the switching transistors exceeds either or both of the limit and error current references.
Microchip Technology Incorporated

Switched mode power supply and operating a switched mode power supply

A switched mode power supply comprises a switched mode converter and a controller for controlling the switched mode converter, wherein the switched mode converter is provided for converting an input voltage to an output voltage and includes, on a primary side, a primary winding and a controllable switch based circuitry connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding coupled to the primary winding, and a capacitive element connected over the secondary winding, wherein the output voltage is obtained as the voltage over the capacitive element. The primary winding comprises a first winding portion and at least one further winding portion.
Telefonaktiebolaget L M Ericsson (publ)

Switched mode power supply and operating a switched mode power supply

A switched mode power supply comprises a switched mode converter (12) and a controller for controlling the switched mode converter, wherein the switched mode converter is provided for converting an input voltage (vin) to an output voltage (vout) and includes, on a primary side, a primary winding (x1) and a controllable switch based circuitry (31) connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding (x2) coupled to the primary winding, and a capacitive element (c) connected over the secondary winding, wherein the output voltage is obtained as the voltage over the capacitive element. The primary winding comprises a first winding portion (np1) and at least one further winding portion (np2); and the switch based circuitry comprises controllable switches (q11, q41, q12, q42, q21, q31) capable of switching between a first operation state wherein the input voltage is connected only over the first winding portion and at least a second operation state wherein the input voltage is connected over the first and the at least one further winding portions, thereby enabling switching between two different transformer ratios (n1, n2)..
Telefonaktiebolaget L M Ericsson (publ)

System and secondary-side power regulation

It is possible to achieve more precise power regulation in switched mode power supply systems by performing at least some control-loop processing on the secondary-side of the transformer. In particular, a secondary-side measurement is processed at least partially by a secondary-side controller to obtain a switching indication signal.
Infineon Technologies Austria Ag

Precise and dynamic control of synchronous rectification switch voltage in a switched mode power supply

A switched mode power supply, in some embodiments, comprises a synchronous rectification transistor switch including a gate, and it further comprises an output driver coupled to the gate and providing a driving signal to the gate. The driving signal is determined based on a dynamically controllable clamp signal and a prior driving signal..
Semiconductor Components Industries, Llc

Switched mode power supply

A switched mode power supply (100) comprises a reactive element (10) and a control signal generator (30) is arranged to generate a first control signal at a first output (31) of the control signal generator (30) and a second control signal at a second output (32) of the control signal generator (30). The first output (31) of the control signal generator (30) is coupled to a first input (21) of a switching stage (20) by means of a first control signal path (40) and the second output (32) of the control signal generator (30) is coupled to a second input (22) of the switching stage (20) by means of a second control signal path (50).
Telefonaktiebolaget L M Ericsson (publ)

Control arrangement for a switched mode power supply

The disclosure relates to a control arrangement for a smps, the control arrangement comprising: an input terminal configured to receive a feedback-signal (v1) representative of an output of the smps; a normal-mode-processing-arrangement-configured to process the feedback-signal and provide a normal-mode-control-signal for operating the smps in a normal mode of operation; a burst-mode-processing-arrangement configured to process the feedback-signal and provide a burst-mode-control-signal for operating the smps in a burst mode of operation; and a feedback-control-processing-arrangement configured to operate the smps such that the feedback signal in the normal mode of operation has a predetermined relationship with the feedback signal in the burst mode of operation.. .

System and a switched-mode power supply

In accordance with an embodiment, a method of operating a switched-mode power supply includes starting up the switched-mode power supply by applying a first switching signal to a control node of the first switching transistor and a second switching signal to a control node of a second switching transistor, where a duty cycle of the first switching signal is less than a duty cycle of the second switching signal. After starting up the switched mode power supply, the switched mode power supply is operated by applying a third switching signal to the control node of the first switching transistor and a fourth switching signal to the control node of the second switching transistor, where a duty cycle of the third switching signal is substantially equal to a duty cycle of the fourth switching signal..

Switched mode power supply output stage configuration

A method of optimizing the number of output stages of a switched mode power supply features a dynamically-updated lookup table (lut) storing historic output stage configuration data per system operating performance point (opp). Upon entering an opp, a margin is added to the historic optimal configuration.

Variable power energy harvesting system

The disclosed invention provides examples of preferred embodiments including systems for harvesting energy from variable output energy harvesting apparatus. The systems include energy harvesting apparatus for providing energy input to a switched mode power supply and a control loop for dynamically adjusting energy harvesting apparatus input to the switched mode power supply, whereby system output power is substantially optimized to the practical.
Triune Systems, Llc

Method for preparing a current measuring arrangement, measuring an output current, controller, switched mode power supply, and base station

A method for preparing a current measuring arrangement of a switched mode power supply comprising a switched mode converter, and a controller for controlling the switched mode converter to convert an input voltage to an output voltage by means of controlling the duty cycle, is provided. A model, in which the output current of the converter is determined from variables and one or more model parameters, wherein the variables comprise the input voltage, the output voltage, and the duty cycle, is formed.
Telefonaktiebolaget L M Ericsson (publ)

Controller for a switched mode power supply and associated methods

The controller configured to provide for a normal mode of operation based on satisfaction of the voltage criterion and a power-saving mode of operation based on satisfaction of the time criterion, wherein the controller is configured to draw a power-saving-mode current in the power-saving mode of operation, and draw a normal-mode current in the normal mode of operation, wherein a magnitude of the normal-mode current is greater than a magnitude of the power-saving-mode current.. .

Control unit for a led assembly and lighting system

A control unit for an led assembly comprising a first and second led unit, said led units being serial connected is described. The led assembly, in use, is powered by a switched mode power supply.
Eldolab Holding B.v.

Switched mode power supply, a controller therefor, a lighting circuit and a control method

A switched mode power supply for converting an input voltage and comprising: a series arrangement of an inductor, a power switch and a control switch for controlling the power switch; a controller configured to control the control switch and having a supply terminal and a ground terminal; a capacitor coupled between the controller ground terminal and supply terminal and for providing power to the controller; a first current path arranged to provide charge to the capacitor only when the control switch is open and the power switch is closed; a connectable second current path arranged to draw current from the control terminal of the power switch thereby opening the power switch, and a connection switch configured to connect the second current path in response to a voltage across the capacitor exceeding a threshold voltage. A controller, lighting circuit and corresponding method are also disclosed..
Nxp B.v.

Controlling a switched mode power supply with maximised power efficiency

A control circuit operable to generate a control signal to control the duty cycle of a switched mode power supply is provided. The control circuit comprises an input terminal for receiving a signal indicative of an input voltage (vin) of the switched mode power supply, and a reference signal generator to generate, in dependence upon the received signal, a reference signal (vr) that is a function of the input voltage (vin).
Telefonaktiebolaget L M Ericsson (publ)

System and a normally-on switched mode power supply

A method for operating a switched mode power supply (smps) during a start-up sequence includes receiving an input current at a bias supply circuit while a first relay and a second relay coupled to a first side circuit within the smps are open, generating a first bias supply voltage based on the received input current, closing the first relay after generating the first bias supply voltage, conducting the input current through the first relay and through an in-rush resistor coupled in series with the first relay, and closing the second relay after a first time period.. .
Infineon Technologies Austria Ag

Overvoltage protection and power saving circuit for a switched mode power supply

The present invention relates to electrical power supplies and, more particularly, to an overvoltage protection and power saving circuit in switched-mode power supplies (smps) (1). It is proposed a switched-mode power supply (1) coupled to an ac voltage source and comprising a transformer having a primary side winding and a secondary side winding, said switched-mode power supply (1) further comprising a rectifier, an input capacitor and an smps controller.
Arcelik Anonim Sirketi

Envelope tracking modulator with feedback

There is disclosed an envelope tracking modulated supply arranged to generate a modulated supply voltage in dependence on a reference signal, comprising a low frequency path for tracking low frequency variations in the reference signal and including a switched mode power supply, a correction path for tracking high frequency variations in the reference signal and including a linear amplifier, a feedback path from the output of the linear amplifier to the input of the linear amplifier, and a combiner for combining the output of the switched mode power supply and the output of the linear amplifier to generate a modulated supply voltage.. .
Snaptrack, Inc.

Switched mode power supply

A switched mode power supply comprising: a rectified voltage terminal and a rectified ground terminal for receiving a phase-cut rectified voltage; a power switch and an inductive element connected in series between the rectified voltage terminal and the rectified ground terminal; a switch controller having a floating ground terminal and a dimming input terminal, wherein the dimming input terminal is for receiving a dimming voltage signal indicative of a required dimming level, wherein the switch controller is configured to control the switch in accordance with the dimming voltage signal and wherein the inductive element is connected between the rectified ground terminal and the floating ground terminal; and a dimming level controller configured to set the dimming voltage signal in accordance with the rectified phase-cut voltage with respect to the floating ground terminal.. .
Nxp B.v.

Off-time control for switched mode power supplies

A switched mode power supply may include circuitry configured to output a bias signal that turns off and on switching circuitry of the switched mode power supply. The circuitry may wait for a first time period determined by the bias signal, and output the bias signal to turn off the switching circuitry when the time period expires.
Cree, Inc.

On-time control for switched mode power supplies

A switched mode power supply may include circuitry configured to output a bias signal that turns off and on switching circuitry of the switched mode power supply. The circuitry may wait for a first time period determined by the bias signal, and output the bias signal to turn off the switching circuitry when the time period expires.
Cree, Inc.

A control circuit and a an energy based pulse skipping mode in a dc/dc converter

A control circuit for a switched mode power supply and a related method are provided for controlling switching elements in a power train of a switched mode power supply. The control circuit comprises a mode controller to monitor the output current to determine whether the output current exceeds a current threshold.
Telefonaktiebolaget L M Ericsson (publ)

Isolated fly-buck converter, switched mode power supply, and measuring a voltage on a secondary side of an isolated fly-buck converter

An isolated fly-buck converter provided for converting an input voltage (vin) to an output voltage (vs) comprises (i) on a primary side, a primary winding (x1) and a non-isolated buck (cp) connected in series, and a pair of switches (q1, q2), wherein the switches are switchable between a forward phase, in which the primary winding and the non-isolated buck are connected to the input voltage, and a fly-buck phase, in which the primary winding and the non-isolated buck are disconnected from the input voltage and are connected to one another in a closed circuit; and (ii) on a secondary side, a secondary winding (x2) coupled to the primary winding, and a first capacitive element (cs) connected over the secondary winding and a first rectifying element (d1) connected to the secondary winding to prevent current from being flown through the secondary winding during the forward phase, wherein the output voltage is achieved as the voltage over the first capacitive element. A supplementary circuitry is provided at the secondary side by aid of which the input voltage can be measured on the secondary side, the supplementary circuitry comprising a second capacitive element (cf) and a second rectifying element (d2) connected in series, wherein the supplementary circuitry is connected over the second wiring such that the second rectifying element prevents current from being flown through the supplementary circuitry during the fly-buck phase, wherein the sum of the voltage over the second capacitive element and the output voltage is indicative of the input voltage..
Telefonaktiebolaget L M Ericsson

Controller

The disclosure relates to a controller (606) for a switched mode power supply, smps (600), comprising: a switch toggling unit (670) having a first switching mode and a second switching mode, wherein the first switching mode is a continuous conduction mode or a boundary conduction mode and the second conduction mode is a discontinuous conduction mode; and a switch mode selector (676) configured to set the switching mode of the switch toggling unit (670) in accordance with a current in an inductor (602) of the smps (600).. .
Nxp B.v.

Forward-flyback topology switched mode power supply

A switched mode power supply (400), comprising a transformer (410) having a primary winding (410-1), a transformer core (410-3) configured to store energy transferred thereto from the primary winding (410-1) during operation, and a secondary winding (410-2) having a first terminal (t1) and a second terminal (t2). The switched mode power supply also has a primary side circuit (q1, q2, c1) arranged to generate voltage pulses and thereby to drive the primary winding (410-1) of the transformer (410), and a secondary side circuit comprising a rectification circuit connected to the secondary winding (410-2) at the first and second terminals (t1, t2).
Telefonaktiebolaget L M Ericsson (publ)

Controller

A controller (606) for a switched mode power supply (100), comprising: a first terminal (620) for receiving a controller input voltage (vcc); a second terminal for coupling to ground (654); a selectably engagable load (656); a load selector (658) configured to: engage the selectably engagable load between the first and second terminals in order to draw a selectably engagable load current (lextra), and disengage the selectably engagable load from the first and second terminals in accordance with a comparison between a disengagement threshold and the controller input voltage or an input current at the first terminal.. .
Nxp B.v.

Switched mode power supply output filter configuration

Method determines a configuration of capacitors in an output filter of a switched mode power supply (smps). Candidate configurations are generated, each associated with a respective cost function value calculated based on number of capacitors of each kind in the candidate configuration and cost assigned to each kind of capacitor.
Telefonaktiebolaget L M Ericsson (publ)

High power-factor control circuit and switched mode power supply

A switch mode power supply (smps) system includes a rectifying circuit for coupling to an ac input voltage and a transformer having a primary winding for coupling to the rectifying circuit and a secondary winding coupled to the primary winding. The system also has a power switch coupled to the primary winding and a control circuit coupled to the power switch.
Bcd Semiconductor Manufacturing Co., Ltd.

Systems and methods for inductive overvoltage protection of pfc buk capacitors in power supplies

Systems and methods are provided that may be implemented for overvoltage protection of bulk capacitors employed in power factor correction (pfc) circuitry components of switched mode power supply units (psus) using one or more inductive overvoltage feedback protection paths (ovps) to monitor a voltage indicative of a pfc bulk capacitor by sensing the real time voltage at one or both of the primary and/or secondary side windings of a psu transformer, and/or using an auxiliary windings of a psu transformer.. .

Motor drive switched mode power supply systems and methods

The embodiments described herein include one embodiment that provides a motor drive that includes driver circuitry that controls operation of an inverter in the motor drive to output power to a motor, control circuitry that controls operation of the driver circuitry, and a switched mode power supply that supplies electrical power to the driver circuitry, the control circuitry, or both. The switched mode power supply includes a primary coil, in which a primary controller stores electrical energy in the primary coil by selectively connecting the primary coil to a power source, and a secondary coil electrically isolated from the primary coil, in which the secondary coil outputs electrical power based at least in part on the electrical energy stored in the primary coil, in which a secondary controller controls the electrical power supplied to the driver circuitry, the control circuitry, or both by selectively connecting the secondary coil to a power output of the switched mode power supply..
Rockwell Automation Asia Pacific Business Center Pte. Ltd.

Switched mode power supply compensation loop

An apparatus (200) for tuning a feedback loop that is arranged to regulate an output voltage (vout) of a switched mode power supply, smps (100), in accordance with a control law defined by control law parameters. The apparatus includes a natural frequency estimator (210) arranged to determine a respective estimate of a natural frequency of each of two zeros in a transfer function that corresponds to a model of the feedback loop.
Telefonaktiebolaget L M Ericsson (publ)

Bidirectional switched mode power supply

Invention is related to a bidirectional switched mode power supply for elevator power systems. The bidirectional switched mode power supply comprises an input for selecting power supply direction of the bidirectional switched mode power supply and a switch having an control pole coupled to the input.
Kone Corporation

System and a switched mode power supply

In accordance with an embodiment, a method of controlling a switched-mode power supply includes demagnetizing a secondary winding of a transformer, monitoring an ending condition of the demagnetizing, tracking an elapsed time until the ending condition is detected based on the monitoring, and shutting down the switched-mode power supply when the elapsed time exceeds a predetermined threshold.. .
Infineon Technologies Austria Ag

System and a switched mode power supply

In accordance with an embodiment, a method of controlling a switched-mode power supply includes operating the switched-mode power supply in a first operating mode by monitoring a feedback signal from an output of the power supply using a feedback interface circuit in a first configuration. The method further includes determining when the feedback signal crosses a first threshold in a first direction, and transitioning the switched-mode power from the first operating to a second operating mode by switching the feedback interface circuit from the first configuration to a second configuration..
Infineon Technologies Austria Ag

Switched mode power supply circuit

A switched mode power supply circuit includes a switching converter receiving an input voltage and generating an output voltage from the input voltage in accordance with a switching signal. A switching controller unit is configured to generate the switching signal in accordance with a control parameter set such that the output voltage matches a set-point..
Infineon Technologies Austria Ag

Voltage droop control in a voltage-regulated switched mode power supply

A switched mode power supply (smps) comprising a controller configured to control switching of the smps to regulate an output voltage at an output of the smps based on a feedback signal that indicates the output voltage, and a voltage droop control circuit. The voltage droop control circuit comprises a voltage droop control signal generator that detects a voltage drop across a component of the smps that is indicative of a current flowing through the output of the smps during operation.
Telefonaktiebolget L M Ericsson (publ)

Control circuits and methods for regulating output voltages using multiple and/or adjustable reference voltages

Methods of regulating an output voltage of a switched mode power supply having a variable input voltage and a power switch include adjusting a reference voltage to adjust a duty cycle of a control signal for the power switch. The reference voltage may be adjusted as a function of the duty cycle, in response to the duty cycle of the control signal being outside a defined range and/or in the response to a temperature within the switched mode power supply being above a threshold temperature.
Astec International Limited

Control circuits and methods for regulating output voltages using multiple and/or adjustable reference voltages

Methods of regulating an output voltage of a switched mode power supply having a variable input voltage and a power switch include adjusting a reference voltage to adjust a duty cycle of a control signal for the power switch. The reference voltage may be adjusted as a function of the duty cycle, in response to the duty cycle of the control signal being outside a defined range and/or in the response to a temperature within the switched mode power supply being above a threshold temperature.
Astec International Limited

Control circuits and methods for regulating output voltages using multiple and/or adjustable reference voltages

Methods of regulating an output voltage of a switched mode power supply having a variable input voltage and a power switch include adjusting a reference voltage to adjust a duty cycle of a control signal for the power switch. The reference voltage may be adjusted as a function of the duty cycle, in response to the duty cycle of the control signal being outside a defined range and/or in the response to a temperature within the switched mode power supply being above a threshold temperature.
Astec International Limited

Control circuits and methods for regulating output voltages based on adjustable references voltages

Control circuits are provided for regulating an output voltage of a switched mode power supply having a variable input voltage and at least one power switch. The control circuits are operable to generate a comparison voltage based on the output voltage of the switched mode power supply and a duty cycle of a control signal provided to the at least one power switch, determine a reference voltage based on whether the generated comparison voltage falls within one of a plurality of voltage ranges, and adjust the duty cycle of the control signal provided to the at least one power switch of the switched mode power supply as a function of the determined reference voltage and the output voltage.
Astec International Limited

Switched mode power supplies

A switched mode power supply, smps. The smps comprises a switch, one or more inductors, an output smoothing capacitor, and a controller.
Toumaz Microsystems Limited

Switched mode assisted linear regulator with seamless transition between power tracking configurations

A switch node assisted linear architecture, including a linear amplifier in parallel with a switched converter, is configurable in two tracking modes: (a) a smal regulator in which the amplifier sets toad voltage with an envelope tracking bandwidth, and the switched converter is configured for current assist, and (b) a switched mode power supply configuration in which the amplifier is switch-decoupled, and the switcher circuit is switched configured with an output capacitor, operable as an smps providing load voltage with an adaptive tracking bandwidth that is less than the envelope tracking bandwidth. Staged switching effects substantially seamless transitions between tracking modes, with the amplifier holding the load voltage at a substantially constant envelope tracking voltage (cvet): (a) for et-at transitions, the cvet mode enables pre-charging the output capacitor to a target at voltage, prior to switch-decoupling the amplifier; and (b) for at-et transitions, cvet mode enables discharging the output capacitor..
Texas Instruments Incorporated

Low power switched mode power supply

A switched mode power supply for supplying power from a power source to one or more output voltage rails, including: a switching unit configured to receive a source voltage from the power source and to output a switched voltage, the switching unit including: a first switch configured to switch the source voltage to the switched voltage, and configured to be driven by the source voltage; and a second switch connected in parallel with the first switch, the second switch configured to switch the source voltage to the switched voltage, and configured to be driven by an output voltage of one of the output voltage rails.. .
Cambridge Silicon Radio Limited

Switched mode power supply, inverter and string monitoring assembly comprising said type of switched mode power supply

The invention relates to a switched-mode power supply (14) for supplying the components of a photovoltaic system (1) with a constant dc output voltage (ua), comprising connections (15) for connecting to the photovoltaic modules (2) of the photovoltaic system (1) for providing a dc input voltage (ue), a dc/dc voltage converter (16) comprising at least one switch (17), a transformer (18), a control device (22) for controlling the at least one switch (17) at a switching frequency (fs) for obtaining the desired dc output voltage (ua), an output equalizing voltage (23) and connections (24) for providing the dc output voltage, as well as the inverter (4) and a string monitoring assembly (3) of a photovoltaic system (1). In order to obtain a dc output voltage (ua) with the losses as low as possible for a very wide range of dc input voltages (ue) between 200 v and 1500 v, the dc/dc voltage converter (16) is formed by a combination of flyback and forward converters having two serially arranged switches (17, 17′).
Fronius International Gmbh

Interference suppression for switched mode power supply with error correction

A switched mode power supply arranged to provide a switched supply at one terminal of an inductor, another terminal of the inductor being connected to a first input of an error amplifier having a reference signal at a second input, the error amplifier generating a corrected switched supply at an output in dependence on the difference between signals at its first and second inputs, there being provided a feedback path between the output of the error amplifier and the first input of the error amplifier, and further comprising circuitry for sensing a switcher interference current in the feedback path of the error amplifier, and for adjusting the corrected switched supply output to reduce the switcher interference current in the output.. .
Nujira Limited

Voltage reculator circuit and method therefor

A voltage regulator circuit arranged to receive a voltage supply signal, and to output a regulated voltage signal is described. The voltage regulator circuit comprises at least one switched mode power supply component selectively configurable to perform regulation of the voltage supply signal, at least one linear voltage regulator component selectively configurable to perform regulation of the voltage supply signal, and at least one controller component.
Freescale Semiconductor, Inc.

Controller for a switched mode power supply having an integrated circuit with a multifunction pin

Disclosure includes a controller in an integrated circuit and a related switched mode power supply. The switched mode power supply has an input power line and a ground line.
Grenergy Opto Inc.

Controllers and related control methods for generating signals representing an output current to a load in a switched mode power supply

Controllers and related control methods for a switched mode power supply are disclosed. The switched mode power supply has an inductive device and a power switch connected in series.
Grenergy Opto Inc.

System and switched mode power supply

In accordance with an embodiment, a power supply controller includes a current controller configured to control an input current of a power supply. The current controller includes a first feed forward controller having an input configured to be coupled to a first power supply signal, and an output coupled to an output of the current controller.
Infineon Technologies Austria Ag

Synchronous rectifier controller

Consistent with an example embodiment, a synchronous rectifier controller for a switched mode power supply comprises a transformer with a secondary side winding and a synchronous rectifier transistor with a gate, a source and a drain; the source and drain provide a conduction channel coupled to the secondary side winding. The controller comprises an input terminal for receiving an input signal related to a voltage at the drain, an output terminal configured to provide an output signal for setting a logic state of the gate, and circuitry having a first threshold and a second threshold.
Nxp B.v.

Method of forming a switched mode power supply controller device with an off mode and structure therefor

At least one embodiment is directed to a semiconductor voltage controller comprising: a start-mode circuit associated with a start-mode; and an off-mode circuit associated with an off-mode, where the voltage controller can be configured to receive a feedback signal and an off-mode signal from a single input and provide an output voltage, where the voltage controller can be configured to be in the off-mode when the feedback signal is less than a skip level and the feedback signal is less than a hv control level, and where the voltage controller can be configured to be in start mode when the feedback signal is greater than hv control level and vcc is below a vcc-start.. .
Semiconductor Components Industries, Llc

Method and reducing radiated emissions in switching power converters

A filter for reducing radiated emissions in switching power converters such as a motor drive is disclosed. The switching power converter modulates a dc voltage input to generate a desired ac voltage output.
Rockwell Automation Technologies, Inc.

Switched mode power supply with improved light load efficiency

A control circuit operable to control the switching of switching elements in a switched mode power supply. The control circuit comprises a switching control signal generator operable to generate control signals for switching the switching elements such that the switched mode power supply converts an input voltage (vin) to an output voltage vout).

Method and offline switch mode power supply with dithered switching frequency

A circuit for use in a switched mode power supply comprising includes an integrated circuit, a transformer, a capacitor, a low voltage circuit and a current limiting resistor. The ic jitters the switching frequency of the switch based on a bias voltage of the integrated circuit.
Landis+gyr, Inc.

Adaptive synchronous rectifier control

The embodiments herein describe a switched mode power converter. In particular, the embodiments herein disclose techniques for adaptive synchronous rectification control.
Iwatt Inc.

Radio with a switched mode power supply

A radio including a switched mode power supply configured to shift its operating frequency to a frequency which alleviates electromagnetic interference with a radio frequency to which the radio is or will be tuned.. .

Switched mode power supply including a flyback converter with primary side control

A method and apparatus for controlling a flyback converter are presented. The flyback converter includes a transformer, a semiconductor switch coupled to a primary winding of the transformer, a current measurement circuit coupled to the semiconductor switch, a diode coupled in series to a secondary winding of the transformer, and a controller.
Infineon Technologies Austria Ag

Controlling a switched mode power supply with maximised power efficiency

A control circuit (200) operable to generate a control signal (d) to control the duty cycle of a switched mode power supply (100). The control circuit (200) comprises a reference signal generator (210) operable to receive a signal indicative of an input voltage (vin) of the switched mode power supply (100) and generate a reference signal (vr) that is a function of the input voltage (vin), and an offset reference signal generator (220) operable to generate an offset reference signal (vr—offset) “by’ combining the reference signal (vr) with an offset signal (voffset), the offset signal (voffset) being independent of the input voltage (vin), the control circuit (200) further comprises an error signal, generator (230) arranged to receive a signal indicative of an output voltage (vout) of the switched mode power supply (100) and operable to generate an error signal (ve) based on the offset reference signal (vr—offset) and based on the output voltage (vout).
Telefonaktiebolaget L M Ericsson (publ)

Switched mode power supply peak-efficiency detection

A peak efficiency detection system may include a switched power supply (sps) module providing an output supply signal. The sps module may have an internal node, and a plurality of sps circuits configured to generate the output supply signal on the internal node.
Stmicroelectronics International N.v.

System and controlling a power supply

In accordance with an embodiment, a controller for a switched mode power supply includes an average current comparator that determines whether an average current within the switched mode power supply is below a current threshold, and a switch signal generation circuit coupled to the average current comparator having switch signal outputs configured to be coupled to a switching circuit of the switched mode power supply. The switch signal generation circuit produces a first switching pattern in a first mode of operation and produces a second switching pattern a second mode of operation.
Infineon Technologies Austria Ag

Controlling a switched mode power supply with maximised power efficiency

A control circuit, that controls the duty cycle of a switched mode power supply, comprises a reference voltage generator that, responsive to the input voltage exceeding a threshold value, generates a predetermined reference signal. Responsive to the input voltage not exceeding the threshold value, the reference voltage generator receives a signal indicative of an input voltage of the switched mode power supply and generates a variable reference signal dependent upon the input voltage.
Telefonaktiebolaget L M Ericsson (publ)

Filter for switched mode power supply

There is provided a filter for receiving a rectangular or stepped source voltage to be filtered and for providing an output voltage, the filter including means arranged to determine the output voltage in dependence on the frequency components of the source voltage within the filter passband, and independent of output current drawn.. .
Nujira Limited

Voltage feed-forward compensation and voltage feedback compensation for switched mode power supplies

A digital control unit generates a control signal to control a duty cycle of a switched mode power supply such that a faster response to an input voltage transient is achieved. The digital control unit comprises a feedback compensator, a feed forward compensator, a transient detector, and a controller.
Telefonaktiebolaget L M Ericsson (publ)

Control of transformer flux density in an isolated switched mode power supply

A control circuit generates a control signal to control a duty cycle of a switched mode power supply such that the magnetic flux density in the transformer is balanced, thereby preventing saturation of the transformer core. This permits the use of unsymmetrical duty cycles within the switch cycle.
Telefonaktiebolaget L M Ericsson (publ)

Switched-mode power supply device and use of such a switched mode power supply device

Switched-mode power supply device having an input for receiving an ac voltage input signal, an output for providing a dc voltage signal and/or a direct-current signal to a downstream consumer, a transformer having a primary winding and a secondary winding, and resonant converter means assigned to the primary side of the transformer, which resonant converter means form an llc topology with inclusion of the primary winding and can be actuated with a variable-frequency control signal on the primary side by means of a control unit, wherein the control unit, which is realized by means of an integrated and/or programmable circuit component, generates the control signal in reaction to and as a function of a zero-crossing detection signal generated from the ac voltage input signal, a current flowing in the transformer windings, in particular on the secondary side, and a constant and/or predeterminable preset signal for an output current flowing at the output, in such a way that regulating means associated with the control unit regulate the output current to the preset signal, and a phase of an input current flowing in the input is synchronized to the phase of the ac voltage input signal, wherein means for generating a sinusoidal signal profile are associated with the regulating means, which signal profile-generating means are independent of the ac voltage input signal and act independently thereof.. .
Exscitron Gmbh

Integrated circuit wireless communication unit and providing a power supply

An integrated circuit comprises a radio frequency (rf) power amplifier (pa) output stage; at least one amplifier stage prior to the rf pa output stage; a linear amplifier comprising a voltage feedback wherein the linear amplifier is operably coupled to a low frequency supply module such that the linear amplifier and low frequency supply module provide a combined first power supply to the rf pa output stage; and a switched mode power supply module arranged to provide a second power supply to the linear amplifier and to the at least one amplifier stage prior to the rf pa output stage.. .

Switched mode power supply including a flyback converter with primary side control

A method and apparatus for controlling a flyback converter are presented. The flyback converter includes a transformer, a semiconductor switch coupled to a primary winding of the transformer, a current measurement circuit coupled to the semiconductor switch, a diode coupled in series to a secondary winding of the transformer, and a controller.

Switched mode power supply with a simplified start-up supply

A switched mode power supply (smps) is disclosed in which a simple primary side controller is used to send a single pulse of energy to the secondary side to switch on an output voltage controller. The pulse is sent across the main power train and a filtering arrangement is provided on the secondary side to minimise the energy at the output of the smps while maximising the energy supplied to the output voltage controller.

Switched mode power supply

A switching power converter includes an inductor coupled to a terminal operably supplied with an input voltage. A semiconductor switch is coupled to the inductor and configured to enable and disable an input current passing through the inductor in accordance with a drive signal.

Integrated capacitor based power distribution

An embodiment provides power (having low voltage, high current, and high current density) to ultra low voltage non-cmos based devices using a distributed capacitor that is integrated onto the same chip as the non-cmos devices. For example, an embodiment provides a spin logic gate adjacent dielectric material and first and second plates of a capacitor.

Methods of operating switched mode power supply circuits using adaptive filtering and related controller circuits

A method of operating a switched mode power supply circuit can be provided by determining an error in a control signal for the switched mode power supply circuit. The error can be compared to an error threshold value to provide a filtering selection.

Loss-less coil current estimator for peak current mode control smps

The present disclosure relates to a high efficiency switched mode power supply (smps) having increased efficiency due to loss-less coil current estimation for current control. A circuit in the control unit of smps comprises a capacitor and the voltage on the capacitor is an integral of the current flowing into the cap over time and if there are current sources which depend on the input and the output voltage, periodically switched with the same signals as the p and n switches, the voltage on the charged capacitor has the same shape as the current through the coil.

Power converter for an led assembly and lighting application

A power converter for an led assembly includes a switched mode power supply arranged to power the led assembly, an ac/dc converter arranged to provide a dc supply voltage to the switched mode power supply, and a control unit arranged to receive an input signal representing a required load voltage for powering the led assembly. The control unit is arranged to control the ac/dc converter based on the input signal..

Method and charging batteries having different voltage ranges with a single conversion charger

Embodiments for a battery charger include a single conversion switched mode power supply having a bias winding on the primary side of the power transformer. The bias winding produces an output that is proportional to the voltage produced on the secondary winding, and is sensed by a programmable voltage sensing circuit.

Power supply controller with input voltage compensation for efficiency and maximum power output

An apparatus includes an on/off controller for regulating an output of a switched mode power supply by selectively enabling current conduction by a power switch within enabled switching cycles and disabling current conduction by the power switch within disabled switching cycles. The controller includes a logic block and a time-to-frequency converter.

Switched mode power supply

The present application relates to switched mode power supplies and provides a method of control in which control is effected at the midpoint of the period in which the input switch is conducting.. .

Method and digital control of a switching regulator

An on/off controller device includes a control circuit to generate a control signal to switch a power switch between an on state and an off state to transfer energy from a primary side to a secondary side of a switched mode power supply. A comparator is coupled to generate an enable signal that enables and disables the switching of the power switch by the control circuit.

Led lighting device

An led lighting device may include a first constant current source, a switched mode power supply, a plurality of leds between the switched mode power supply and the first constant current source, and powered by the switched mode power supply, and a voltage divider between the switched mode power supply and the plurality of leds. In various embodiments, the voltage divider may include a plurality of switches.

High resolution control for a multimode smps converter and high resolution slope generator

In various embodiments a controller for controlling the operation of a switched mode power supply is provided, the controller comprising: a first signal source configured to provide a first set of signals including a set signal and a clear signal, wherein the first set of signals may correspond to a first mode of operation of the switched mode power supply; a second signal source configured to provide a second set of signals including a set signal and a clear signal, wherein the second set of signals may correspond to a second mode of operation of the switched mode power supply; a selecting circuit coupled to the first signal source and to the second signal source, the selecting circuit being configured to select either the first set of signals or the second set of signals; a switching signal generating circuit coupled to the selecting circuit and configured to provide a switching signal to the switched mode power supply based on the set of signals received from the selecting circuit.. .

Method and a controller for determining a demagnetization zero current time for a switched mode power supply

In various embodiments a method is provided for determining a demagnetization zero current time for a switched mode power supply having a transformer, a first side and a second side being galvanically separated from each other and a switched mode power supply controller, the method including: determining a first voltage being applied to one side of the transformer; determining a second voltage provided at the other side of the transformer; determining a time the first voltage is provided to a winding of the transformer; and determining, by a circuit located on the same side of the transformer as the switched mode power supply controller, the demagnetization zero current time using the determined first voltage, the determined second voltage and the determined time.. .

Method and a circuit arrangement for determining a demagnetization zero current time

In various embodiments a method for determining a demagnetization zero current time, at which a transformer is substantially demagnetized, for a switched mode power supply comprising a transformer is provided, wherein the method may include: applying a first current through a winding of one side of the transformer; interrupting the current flow of the first current; measuring a time at which a voltage across a winding of another side of the transformer becomes substantially zero; and determining the demagnetization zero current time using the measured time.. .

Switched-mode power supply

Consistent with example embodiments disclosed, there are switched-mode power supplies (smps) in which a signaling capacitor transmits information across a transformer of the power supply. Such embodiments can avoid drawing power from the output capacitor in order to provide communication signals and so do not cause a drop in the output voltage when signaling to the primary side.

Load change detection for switched mode power supply with low no load power

A pulse scheme is used for load change detection in a switching mode power supply with low no-load power consumption. The pulse scheme includes a measurement pulse for determining a load condition or a no-load condition at the output.

Method and reducing radiated emissions in switching power converters

A filter for reducing radiated emissions in switching power converters such as a motor drive is disclosed. The switching power converter modulates a dc voltage input to generate a desired ac voltage output.

Interference suppression for switched mode power supply

The invention relates to a switched mode power supply comprising at least one switch and at least one inductor, the at least one switch being arranged to connect one terminal of the at least one inductor to one of a plurality of supply voltages, the other terminal of the at least one inductor providing a supply output, and further comprising a capacitor connected in parallel with the at least one inductor.. .

Constant current control units and control methods thereof for primary side control

Discloses are a constant current control unit and a control method, apt to a switched mode power supply with primary side control. The switched mode power supply comprises a power switch and an inductive device.

Control methods and apparatuses for switching mode power supplies

Embodiments disclose control methods and control apparatuses for a switched mode power supply. The switched mode power supply comprises a current-controllable device.

Hvac systems, controls, and methods including switch mode power supplies to achieve low standby power

Exemplary embodiments are disclosed of a heating, ventilation and air conditioning (hvac) system that includes a switched mode power supply. The switched mode power supply is configured to provide standby power to the hvac system.



Switched Mode Power Supply topics:
  • Switched Mode Power Supply
  • Feedback Signal
  • Integrated Switch
  • Integrated Circuit
  • Switching Power Supply
  • Differentiation
  • Leakage Current
  • Electrical Device
  • Fault Current
  • Semiconductor
  • Control Unit
  • Led Assembly
  • Power Management
  • Electronic Device
  • Portable Electronic Device


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