The ON Semiconductor power factor corrected fly back controller targeting isolated constant current LED driver operates in a quasi-resonant mode to provide high efficiency. Thanks to a novel control method, the device is able to tightly regulate a constant LED current from the primary side. This removes the need for secondary side feedback circuitry, its biasing and for an opt coupler.

High Voltage Start-up
CC / CV accurate control Vin up to 320Vrms
Tight LED constant current regulation of ±2% typical
Digital power factor correction
Analogue and digital dimming
Cycle by cycle peak current limit
Wide operating VCC range
Constant voltage / LED open circuit protection
Winding short circuit protection
Secondary diode short protection
Output short circuit protection
Thermal shutdown