PS223 Datasheet, PDF (2/11 Pages) Silicon Touch Technology Inc. – 4-Channel Secondary Monitoring IC With 4-Channel OCP And an Additional OTP

點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS223
PS223
4-Channel Secondary Monitoring IC
With 4-Channel OCP
And an Additional OTP
General Description
PS223 is specially designed for switching power supply system. Four important
functions of PS223 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 double
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 OTP channel helps users monitor if there have any over temperature
occur.
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
• Over-temperature protection
• 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 UV/OC protection
• 38mS PSON/ control de-bounce
• 73uS de-bounce for noise immunity
• Wide power supply range
• Special care for AC power off
4-Channel Secondary Monitoring IC
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Version：A.006