PS223

The PS223 is a kind of 4-channel secondary monitoring IC designed for switching power supply system. The device includes four important functions: over-voltage protection, over-current protection, under-voltage protection and power good signal generating. OVP/UVP (Over-Voltage/Under-Voltage Protection) monitors 3.3 V, 5 V and double 12 V 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 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 PS223 can provide a reliable power supply environment.

There are some features about PS223 as follows: (1)over/under-voltage protection and lock out; (2)over-current protection and lock out; (3)over-temperature protection; (4)fault protection output with open drain output stage; (5)open drain power good output signal for power good input; (6)built-in 300mS power good delay; (7)AC on 75ms delay for UV/OC protection; (8)38mS PSON/ control de-bounce; (9)73uS de-bounce for noise immunity; (10)wide power supply range; (11)special care for AC power off.

The last one is about the PS223 absolute maximum ratings: (1)storage temperature (Tstg): -40 to +125; (2)operating temperature (Topr): -30 to +90; (3)supply voltage (VCC): -0.5 to +16.0 V at pin VCC; (4)input voltage range (VI): -0.5 to +16.0 V at pins VS12A/B, IS12A/B; -0.5 to +9.0 V at pins VS5, IS5; -0.5 to +7.0 V at pins VS33, IS33; -0.5 to +16.0 V at pin PGI; -0.5 to VCC+0.5 V at pins PSON/, OTP; (5)output voltage range (VO): -0.5 to +16.0 V at pin FPO/ and -0.5 to VCC+0.5 V at pin PGO.