[System General Corp]

DESCRIPTION
SG6105 controller is designed for switching mode power supply 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, some protection features against over-voltage and over-power are implemented. It directly senses all the output rails for OVP without the need of external dividers.

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 regulator 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, such as:
   ATX NLX SFX (micro-ATX)