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