PS257 ic equivalent, 4-channel secondary monitoring ic.
z Over-Voltage/Under-Voltage Protection (OVP & UVP) and lock out It monitors 3.3V, 5V, -12V and dual +12V. FPO/ goes to high and latch-up when one of these supply voltage.
PS257
PS257 is designed for monitoring a switching power supply (S.P.S.), especially for desktop ATX system. It protects the S.P.S. and PC from over voltage, under voltage, over current, short circuit and over temperature status. It monitors dual +.
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