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3520 Datasheet

The UTC 3520 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.
It contains various functions, which are Over Voltage Protection
(monitors 3.3V, 5V, 12V and PT input voltage level), Under Voltage
Protection (monitors 3.3V, 5V and 12V input voltage level), Power
Good Output (monitors the voltage level of power supply), Remote
On/Off control and etc. It can minimize external components of
switching power supply systems in personal computer.
* Complete PWM control and protection circuitry
* Over voltage protection for 3.3V / 5V / 12V / PT
* Under voltage protection for 3.3V / 5V / 12V
* Power good output is open drain output
* PWM control output is open drain output
* Remote ON/OFF function De–bounce time
* 280ms UVP time delay  
* 280ms PG time delay
* Soft-Start function built-in
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