FAN6921MLMY

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

ƒ Integrated PFC and Flyback Controller

ƒ Critical Mode PFC Controller

ƒ Zero-Current Detection for PFC Stage

ƒ Quasi-Resonant Operation for PWM Stage

ƒ Internal Minimum toff 8µs for QR PWM Stage

ƒ Internal 10ms Soft-Start for PWM

ƒ Brownout Protection

ƒ H/L Line Over-Power Compensation OPC

ƒ Latched Protection FB Pin

− Over-Power/ Overload Protection

− Short-Circuit Protection

− Open-Loop Protection

ƒ Externally Latch Triggering RT Pin

ƒ Adjustable Over-Temperature Latched RT Pin

ƒ VDD Pin & Output Voltage OVP Latched

ƒ Internal Temperature Shutdown 140°C

Applications

ƒ AC/DC NB Adapters

ƒ Open-Frame SMPS

ƒ Battery Charger