FL7921R Description
The highly integrated FL7921R bines a Power Factor Correction (PFC) controller and a Quasi−Resonant PWM controller. Integration provides cost effect design and allows for fewer external ponents. For PFC, FL7921R uses a controlled on−time technique to provide a regulated DC output voltage and to perform natural power factor correction.
FL7921R Key Features
- Integrated PFC and Flyback Controller
- Critical-Mode PFC Controller
- Zero-Current Detection for PFC Stage
- Quasi-Resonant Operation for PWM Stage
- Internal Minimum tOFF 8 ms for QR PWM Stage
- Internal 10 ms Soft-Start for PWM
- Brownout Protection
- High / Low Line Over-Power pensation
- Auto Recovery Over-Current Protection
- Auto Recovery Open-Loop Protection
FL7921R Applications
- Medium to High Power LED Lighting Driver Application