NCP1381 Datasheet - ON Semiconductor

NCP1381 Low Standby High Performance PWM Controller

Pin# Symbol 1 GTS_ADJ GTS Level Adjustment 2 BO Brown *out 3 DMG Detects the Zero Voltage Crossing Point 4 Timer Fault Timer 5 Skip/OVP Adjust the Skip Level 6 FB Feedback Signal 7 CS Current Sense Pin 8 GND 9 DRV The IC Ground The Driver Output 10 VCC VCC Input 11 GTS Dir.

NCP1381, NCP1382 Low- Standby High Performance PWM Controller Housed in a SO 14 package, the NCP1381/82 includes everything needed to build rugged and efficient Quasi Resonant (QR) Switching Power Supplies. When powered by a front end Power Factor Correction circuitry, the NCP1381/82 automatically disconnects the PFC controller in low output loading conditions (with an adjustable level), thus improving the standby power. This is particularly well suited for medium to high.

NCP1381 Features

* several efficient protection options like a) a short

* circuit / overload detection independent of the auxiliary voltage b) an auto

* recovery brown

* out detection and c) an input to externally latch the circuit in case of Overvoltage Protection or Over Temperature Protection. Fea

NCP1381_ONSemiconductor.pdf