3-Channel Secondary Monitoring IC

Version

：A.001

-1-

PS236

PS236

3-Channel Secondary Monitoring IC

With an Additional OCP Channel

General Description

PS236 is specially designed for switching power supply system.

Four important

functions of PS236 are the following: over-voltage protection, over-current protection,

under-voltage protection and power good signal generating.

OVP/UVP (Over-Voltage/Under-Voltage Protection) monitors 3.3V, 5V and 13V to

protect our power supply. FPO/ goes to high when one of these supply voltages

exceeds their normal operation voltage range.

OCP (Over Current Protection) monitors IS33, IS5, IS13 input current sense.

condition helps users design OCP easily.

An additional OCP channel helps users monitor additional VSX rail output current.

Power good signal generating can notify personal computer when power supply is

ready or power supply is going to shutdown, therefore it can provide a reliable power

supply environment.

Features

• Over/Under-voltage protection and lock out

• Over-current protection and lock out

• Fault protection output with open drain output stage

• Open drain power good output signal for power good input

• Built-in 300mS power good delay

• AC on 3mS delay for UV/OC protection

• 17uS de-bounce for noise immunity

• Wide power supply range (4.2V~18V)

• Special care for AC power off