onsemi NCL30076 Quasi-Resonant Buck Controllers

onsemi NCL30076 Quasi-Resonant Buck Controllers are ideal for a wide dimming range down to 1% by analog dimming control to relieve audible noise and flicker in PWM dimming. onsemi’s proprietary LED current calculation technique driven by zero input offset amplifiers performs precise constant current in the whole analog dimming range. Multi-mode operation provides high efficiency with minimized switching loss by QR at heavy load and deep analog dimming by DCM at light load.