PS224

PS224 Version Issue Date File Name Total Pages : A.004 : 2005/08/19 : SP-PS224-A.004.doc : 11 4-Channel Secondary Monitoring IC Free Datasheet http://www.datasheetlist.com/ SILICON TOUCH TECHNOLOGY INC. PS224 PS224 4-Channel Secondary Monitoring IC General Description PS224 is specially designed for switching power supply system. Four important functions of PS224 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 output stage Open drain power good output signal for power good input Built-in 300mS power good delay AC on 75ms delay for U...