The KP1261SP is a high-performance Active Power Factor Correction (APFC) Quasi-Resonant (QR) Buck LED Power Switch designed for offline constant-current LED lighting applications. It integrates a 650V power MOSFET, high-voltage power supply circuit, and quasi-resonant buck controller into a single device, enabling high efficiency, high power factor (PF > 0.9), low THD, and excellent constant-current accuracy. The integrated design eliminates the need for an auxiliary winding, reducing external component count and system cost while improving overall reliability.
Product Group
Integrated Circuit (IC)
Input Voltage
Universal AC Input (85–265VAC)
Power Factor
>0.9
Operating Mode
APFC Quasi-Resonant (QR) Buck Constant-Current LED Power Switch
