Power Integrations Inc.

San Jose, CA, United States

Power Integrations Inc.

San Jose, CA, United States
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Patent
Power Integrations Inc. | Date: 2017-08-30

A power converter controller includes a drive circuit that generates a drive signal to switch a power switch to control a transfer of energy to an output of the power converter in response to a current sense signal, a feedback signal, and a current limit signal. A current limit generator generates the current limit signal in response to a load coupled to the output. An audible noise detection circuit generates a frequency skip signal in response to the drive signal to indicate when an intended frequency of the drive signal is within an audible noise frequency window. A state of the current limit signal fixed when the intended frequency of the drive signal is within the audible noise frequency window. A first latch generates a hold signal to control the current limit generator to hold the current limit signal in response to the frequency skip signal and the feedback signal.


Patent
Power Integrations Inc. | Date: 2017-03-22

A controller for a switched mode power converter includes limit-to-valley ratio circuitry, an on-time generator, and a drive circuit. The limit-to-valley ratio circuitry is coupled to generate a ratio signal in response to sensing a switch current of a switch that regulates an output of the switched mode power converter. The ratio signal is representative of a time ratio between a first length of time that the switch current is at or above a switch current limit and a second length of time that the switch current is at or below a switch current valley that is a portion of the switch current limit. The on-time generator is coupled to vary a switch on-time signal in response to receiving the ratio signal. The drive circuit is coupled to output a drive signal to a control terminal of the switch in response to receiving the switch on-time signal.


Patent
Power Integrations Inc. | Date: 2017-02-15

A diode includes a two-dimensional electron gas formed in a heterojunction defined between first and second semiconductor material layers. First and second layers of insulating material are disposed on the second semiconductor layer. First and second electrodes are disposed in the second layer of insulating material. The first electrode is coupled to the second semiconductor material layer. The second electrode is coupled to the heterojunction. Third and fourth layers of insulating material are disposed on the second insulating layer. A first via is disposed in the fourth layer of insulating material and coupled to the second electrode. A first field plate is disposed in the fourth layer of insulating material. An edge of the first field plate laterally extends towards first via. The first via is separated from an edge of the first via. The first field plate is coupled to the first electrode.


Patent
Power Integrations Inc. | Date: 2017-03-22

A boost-bypass converter includes a boost inductor coupled between an input and an output of the boost-bypass converter. A bypass diode is coupled between the input the output of the boost-bypass converter. A boost switching element is coupled to the boost inductor, and is coupled to be activated during a first interval in each line half cycle of an input voltage to boost an output voltage at the output of the boost-bypass converter. The boost switching element is coupled to be deactivated during a second interval in said each line half cycle such that the output voltage drops towards the input voltage. The output voltage is coupled to follow the input voltage during a third interval in said each line half cycle of the input voltage. Energy is transferred between the input and the output of the boost-bypass converter through the bypass diode during the third interval.


Patent
Power Integrations Inc. | Date: 2016-11-11

A charging circuit supplies charge to a charge store to provide power to a controller of a power converter. The power converter includes an inductive component having a winding coupled to receive power from an input to the power converter. A switching circuit includes a field effect transistor (FET) and a switching element. The FET is coupled in series between the winding and the switching element. A controller is coupled to control the switching of the switching element, and a charge store is coupled to provide power to the controller. The charging circuit includes a current diversion circuit coupled to conduct a winding current from the FET to the charge store. The switching element is arranged to allow the winding current to flow through the current diversion circuit to the charge store.


A method for regulating an output of a power converter includes receiving a signal at a single terminal of an integrated circuit controller. The signal at the single terminal represents a line input voltage of the power converter during at least a portion of an on time of a power switch. The signal at the single terminal represents an output voltage of the power converter during at least a portion of an off time of the power switch. The power switch is switched in response to the signal to regulate the output of the power converter.


A controller for a power converter includes a driver circuit that generates a control signal to switch a power switch in response to an output, and a control circuit that controls the switching of the power switch. The control circuit includes a storage time reference circuit generates a storage time reference signal responsive to an input. A first comparator generates a collector off signal in response to a comparison of a switch current sense signal and a collector off reference signal. A storage time regulator circuit generates a base off reference signal in response to the storage time reference signal and the collector off signal. A second comparator generates a base off signal in response to a second comparison of the switch current sense signal and the base off reference signal. The driver circuit is coupled to discontinue and start charging a base terminal of the BJT power switch.


Patent
Power Integrations Inc. | Date: 2017-03-06

A controller for use in a power converter includes a first terminal to provide a turn on signal to initiate turning on of a power switch and a second terminal to provide a turn off signal to initiate turning off the power switch. A detection circuit is coupled to detect a turn off time delay. The turn off time delay is the duration of time between an initiating of a turn off of the power switch by the turn off signal and an actual turn off of the power switch. A control circuit is coupled to control the turn on signal to regulate the turn off delay time to a target time value. The control circuit controls the turn on signal by controlling an amount of charge delivered to turn on the power switch.


Patent
Power Integrations Inc. | Date: 2017-03-03

A semiconductor device includes a substrate and a first active layer disposed over the substrate. The semiconductor device also includes a second active layer disposed on the first active layer such that a lateral conductive channel arises between the first active layer and the second active layer a source, gate and drain contact are disposed over the second active layer. A conductive charge distribution structure is disposed over the second active layer between the gate and drain contacts. The conductive charge distribution structure is capacitively coupled to the gate contact.


A method of operating a power converter includes applying a first signal sequence to one or more terminals of the power converter to unlock a controller of the power converter and cause the controller to enter a programming mode, applying a second signal sequence to the one or more terminals of the power converter to program a controller parameter of the power converter, and applying a third signal sequence to the one or more terminals to lock the controller of the power converter and cause the power converter to enter a locked mode. The one or more terminals of the power converter includes one or more input terminals of the power converter that converter are adapted to be coupled to a programmable ac or dc supply, or one or more output terminals of the power converter that are adapted to be coupled to a programmable electronic load.

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