PS252C

PS252C Version : A.001 Issue Date : 2009/03/13 File Name : SP-PS252C-A.001.doc Total Pages : 10 2-Channel Secondary Monitoring IC 9 7 1 SILICON TOUCH TECHNOLOGY INC. 9-7F-1, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 SILICON TOUCH TECHNOLOGY INC. PS252C 2-Channel Secondary Monitoring IC PS252C General Description PS252C is specially designed for switching power supply system. Four important functions of PS252C are the followings: over-voltage protection, over-current protection, under-voltage protection and power good signal generating. OVP/UVP (Over-Voltage/Under-Voltage Protection) monitors dual 12V to protect our power supply and PC, FPO/ goes to high when one of these supply voltages exceeds their normal operation voltage range. OCP (Over Current Protection) monitors IS12A, IS12B input current sense. An adjustable over-current condition composed of Iref and “protection current range resistor” helps users design OCP easily. An additional protection input pin provides the flexibility for design protection circuit. Power good signal generating notifies 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 Additional protection input Fault protection output with open drain output stage Open drain power ...