1
Balu Balakrishnan: Switched mode power supply integrated circuit with start-up self-biasing. Power Integrations, Thomas E Schatzel, February 8, 1994: US05285369 (198 worldwide citation)

An embodiment of the present invention is a switching power supply that includes a full-wave bridge rectifier to rectify incoming AC line voltage, a transformer having a primary winding and two secondary windings and a switched mode power supply chip that includes an integrated high voltage power MO ...


2
Balu Balakrishnan: Plastic quad-packaged switched-mode integrated circuit with integrated transformer windings and mouldings for transformer core pieces. Power Integrations, Law Offices of Thomas E Schatzel, November 21, 1995: US05469334 (160 worldwide citation)

A switching power supply embodiment of the present invention includes a plastic leaded chip carrier (PLCC) that has two rectangular holes joined by a channel on the bottom surface that allow the PLCC to be surface mounted on a printed circuit board over a ferrite U-core section. A ferrite I-core sec ...


3
Balu Balakrishnan: Three-terminal switched mode power supply integrated circuit. Power Integrations, Thomas E Schatzel, May 17, 1994: US05313381 (147 worldwide citation)

An embodiment of the present invention is a three-terminal switched mode power supply chip with a signal terminal for accepting a combination of a feedback control signal and bias supply voltage to operate the chip. A feedback extraction circuit separates the feedback signal from the power supply vo ...


4
Balu Balakrishnan: Self powering technique for integrated switched mode power supply. Power Integrations, Thomas E Schatzel, May 7, 1991: US05014178 (129 worldwide citation)

A regulator circuit is connected to a transformer. The transformer has a primary winding connected to a rectified D.C. voltage signal and has a feedback winding. A feedback capacitor is coupled across the feedback winding of the capacitor. The regulator circuit includes a high voltage switching tran ...


5
Balu Balakrishnan: High frequency switched mode converter. Power Integrations, Thomas E Schatzel, November 3, 1992: US05161098 (104 worldwide citation)

A small, lightweight, efficient, very low cost AC adaptor for consumer electronics applications is realized by combining a switching regulator integrated circuit along with a leadframe adapted to mount the switching regulator integrated circuit off-center, a single-sided printed circuit board and hi ...


6
Balu Balakrishnan: Integrated backplane interconnection architecture. Douglas L Weller, June 16, 1992: US05122691 (82 worldwide citation)

A backplane, provides a physical layer level interconnection between a plurality of modules. The backplane includes a physical layer inplementation of an interconnection topology incorporated within one or more integrated circuits called interconnect chips. Incorporated on the interconnect chips are ...


7
Balu Balakrishnan, Alex Djenguerian, Leif Lund: Frequency jittering control for varying the switching frequency of a power supply. Power Integrations, Blakely Sokoloff Taylor & Zafman, June 19, 2001: US06249876 (77 worldwide citation)

EMI emission is reduced by jittering the switching frequency of a switched mode power supply. An oscillator with a control input for varying the oscillator's switching frequency generates a jittered clock signal. In one embodiment, the oscillator is connected to a counter clocked by the oscilla ...


8
Balu Balakrishnan, Alex B Djenguerian: Method and apparatus for improving efficiency in a switching regulator at light loads. Power Integrations, Blakely Sokoloff Taylor & Zafman, April 3, 2001: US06212079 (73 worldwide citation)

A switching regulator that operates at a frequency for a first range of feedback signal values and at a variable frequency without skipping cycles for a second range of feedback signal values. In one embodiment, a switching regulator for a switched mode power supply includes a power switch coupled b ...


9
Balu Balakrishnan, Alex B Djenguerian: Off-line converter with digital control. Power Integrations, Blakely Sokoloff, Taylor & Zafman, May 1, 2001: US06226190 (72 worldwide citation)

A DC to DC converter comprising an energy storage element including an energy storage element input and an energy storage element output, the energy storage element input coupled to receive a first power level and the energy storage element output providing a second power level. The converter also i ...


10
Balu Balakrishnan, Alex B Djenguerian, Kent Wong: Method and apparatus for reducing audio noise in a switching regulator. Power Integrations, Blakely Sokoloff Taylor & Zafman, February 25, 2003: US06525514 (63 worldwide citation)

A switching regulator utilizing on/off control that reduces audio noise at light loads by adjusting the current limit of the switching regulator. In one embodiment, a switching regulator includes a state machine that adjusts the current limit of the switching regulator based on a pattern of feedback ...