PWM CONTROLLER WITH SUPERVISORY CIRCUIT FOR SWITCHING POWER SUPPLY

DESCRIPTION

UTC 3521 PWM controller is designed for switching mode power

supply for 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 implements.

FEATURES

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

* Under-Voltage Detection for 3.3V, 5V and 12V

* Over-Power Protection

* Remote ON/OFF Function

* Power Good Circuitry

* Delay Time for PG Signal

* Delay Time for Over-Voltage and Under-Voltage Protection

* On-Chip Oscillator and Error Amplifier