SG6105ATP 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 & 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)