PFC，Fairchild Semiconductor### 功率因数校正 PFC IC，Sanken Electric
Description
The highly integrated FAN6921ML combines a Power Factor Correction PFC controller and a QuasiResonant PWM controller. Integration provides cost effect design and allows for fewer external components. For PFC, FAN6921ML uses a controlled on-time technique to provide a regulated DC output voltage and to perform natural power factor correction. With an innovative THD optimizer, FAN6921ML can reduce input current distortion at zero-crossing duration to
improve THD performance.
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 8µs for QR PWM Stage
Internal 10ms Soft-Start for PWM
Brownout Protection
H/L Line Over-Power Compensation OPC
Latched Protection FB Pin
− Over-Power/ Overload Protection
− Short-Circuit Protection
− Open-Loop Protection
Externally Latch Triggering RT Pin
Adjustable Over-Temperature Latched RT Pin
VDD Pin & Output Voltage OVP Latched
Internal Temperature Shutdown 140°C
Applications
AC/DC NB Adapters
Open-Frame SMPS
Battery Charger