桌上型電腦電源供應器ATX控制IC

The 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.

An innovated AC-signal sampling circuitry provides a sufficient
power-down warning signal for PG. A built-in timer generates
accuracy timing for control circuit including the PS-off delay. The
cycle-by-cycle PWM switching prevents the power transformer from
the saturation and ensures the fastest response for the short-circuit
protection which greatly reduce the stress for power transistors.

Two internal precision TL431 shunt regulators provide stable
reference voltage and driver for 3.3V and 5V-standby regulation.
Utilizing minimum number of external components, the SG6105
includes all of the functions for push-pull and/or half-bridge topology,
decreasing the production cost and PCB space, and increasing the
MTBF for power supply.