Apparatus for power factor control

Automatic PWM controlled driver circuit and method

Automatic PWM controlled driver circuit and method

Backlight light source drive device

Ballast circuit for a 220-volt improved lighting unit

Ballast circuit for fluorescent lamp

Ballast circuit with improved transfer functions

Ballast control IC with power factor correction

Ballast converter with power factor and current crest factor...

Ballast for a discharge lamp with integrated control circuit...

Circuit and method for average-current regulation of light...

Circuit and method for improving the performance of a light...

Circuit arrangement for operating discharge lamps

Circuit for power-factor correction

Circuit for powering a gas discharge lamp

Compact fluorescent lamp with overcurrent protection

Computer power supply with a display function

Control circuit for maintaining constant power in power...

Controller and driver architecture for double-ended...

Cost effective high performance circuit for driving a gas discha