Description

The highly integrated FAN4800AS/CS/01S/02S parts are specially designed for power supplies that consist of boost PFC and PWM. They require very few external components to achieve versatile protections / compensation. They are available in 16-pin DIP and SOP packages.
The PWM can be used in either current or voltage mode. In voltage mode, feed- forward from the PFC output bus can reduce the secondary output ripple.

Features

■ Pin-to-Pin Compatible with ML4800 and FAN4800 and CM6800 and CM6800A
■ PWM Configurable for Current Mode or Feedforward Voltage-Mode Operation
■ Internally Synchronized Leading-Edge PFC and Trailing-Edge PWM in One IC
■ Low Operating Current
■ Innovative Switching-Charge Multiplier Divider
■ Average-Current Mode for Input-Current Shaping
■ PFC Over-Voltage and Under-Voltage Protections
■ PFC Feedback Open-Loop Protection
■ Cycle-by-Cycle Current Limiting for PFC/PWM
■ Power-on Sequence Control and Soft-Start
■ Brownout Protection
■ Interleaved PFC/PWM Switching
■ Improved Efficiency at Light Load
■ fRTCT=4•fPFC=4•fPWM for FAN4800AS/01S
■ fRTCT=4•fPFC=2•fPWM for FAN4800CS/02S

Applications

■ Desktop PC Power Supply
■ Internet Server Power Supply
■ LCD TV, Monitor Power Supply
■ UPS
■ Battery Charger
■ DC Motor Power Supply
■ Monitor Power Supply
■ Telecom System Power Supply
■ Distributed Power