PS224A1

PS224A1 Version : A.002 Issue Date : 2009/05/19 File Name : SP-PS224A1-A.002.doc Total Pages : 10 4-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. PS224A1 PS224A1 4-Channel Secondary Monitoring IC General Description PS224A1 is specially designed for switching power supply system. Four important functions of PS224A1 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 3.3V, 5V and 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 IS33, IS5, 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 ou...