SG6105A Datasheet PDF - Fairchild

●Description

●SG6105A controller is designed for switching-mode power supplies for desktop PCs. It provides all the functions necessary to monitor and control the output of the power supply. Remote ON/OFF control, power-good circuitry, and protection features against over-voltage and over-power are implemented. It directly senses all the output rails for OVP without the need for external dividers. An innovative AC-signal sampling circuitry provides a sufficient power-down warning signal for PG.

●Features

●PC Half-Bridge (or 494) Power Supply Supervisor + two 431 + PWM

●High Integration with Few External Components

●Over-Voltage Protection for 3.3V, 5V, and 12V

●Under-Voltage Protection for 3.3V, 5V, and 12V

●Under-Voltage Protection for -12V and/or -5V

●Over-Power and Short-Circuit Protection

●Power-Down Warning Circuitry

●Power-Good Circuitry

●Delay Time for PSON and PG Signal

●Remote ON/OFF Function

●On-Chip Oscillator and Error Amplifier

●Two Shunt Regulators for 3.3V and 5V-Standby

●Latching PWM for Cycle-by-Cycle Switching

●Push-Pull PWM Operation and Totem Pole Outputs

●Soft-Start and Maximum 93% Duty Cycle

●Applications

●Switching mode power supply for computers:

●AT

●NLX

●SFX (micro-ATX)