General Description

The APW1681 is designed to minimize the external components of personal-computer switching power supply systems. It provides protection circuits, power good indicator, fault protection output FPO and PSON control.

Features

• Over Voltage Protection and Lock Out for 3.3 V, 5 V, and 12 V

• Under Voltage Protection and Lock Out for 3.3 V and 5 V

• Fault Protection Output with Open Drain Output Stage

• Open Drain Power Good Output Signal for Power Good Input, 3.3 V and 5 V

• 300 ms Power Good Delay

• 2.36 ms Control to Turn-Off Delay

• 38 ms PSON Control Debounce

• 75 ms Delay for 3.3V and 5V Under Voltage Protection

• 73 µs Width Noise Deglitches

• Wide Power Supply Voltage Range from 4 V to 15 V

• Intelligent Under Voltage Protection to Prevent Instantaneously AC Power Black Out PSON FPO

Applications

• PC Switching Power Supply