GENERAL DESCRIPTION
PS257 It protects the S.P.S. and PC from over voltage, under voltage, over current, short circuit and over temperature status. PS257 also provides a FAN drive module with two control modes - "step control mode" and "OP-amp control mode". It adjusts the FAN speed according to the sensed temperature and generates "over-temperature protection" when the temperature is too high. It monitors the power-good-input signal (PGI) from SPS and generates power-good-output signal (PGO) to motherboard. Therefore it enables/disables protection according to the SPS status and provides a reliable power supply environment. FEATURES
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 voltages exceeds their normal operation voltage range. z Over Current Protection (OCP) and lock out It monitors 3.3V, 5V and dual +12V. FPO/ goes to high and latch-up when one of these supply curr...
SiTI
