NCP1380 데이터 시트보기 (PDF) - ON Semiconductor

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NCP1380

Quasi-Resonant Current-Mode Controller for High-Power Universal Off-Line Supplies

ON Semiconductor 

NCP1380

PIN FUNCTION DESCRIPTION

Pin N5

Pin Name

1

ZCD

Function

Zero Crossing Detection

Adjust the over power protection

2

FB

Feedback pin

3

CS

Current sense

4

GND

−

5

DRV

Driver output

6

VCC

Supplies the controller

7

Fault

Over voltage and Over temperature

protection (A and B versions)

Over−voltage and Brown−out

protection (C and D versions)

8

CT

Timing capacitor

Pin Description

Connected to the auxiliary winding, this pin detects the core

reset event.

Also, injecting a negative voltage smaller than 0.3 V on this

pin will perform over power protection.

Hooking an optocoupler collector to this pin will allow

regulation.

This pin monitors the primary peak.

The controller ground

The driver’s output to an external MOSFET

This pin is connected to an external auxiliary voltage.

Pulling this pin down with an NTC or up with a zener diode

allows to latch the controller.

This pin observes the HV rail and protects the circuit in

case of low main conditions. It also offers a way to latch the

circuit in case of over voltage event.

A capacitor connected to this pin acts as the timing

capacitor in foldback mode.

NCP1380 OPTIONS

NCP1380 / A

NCP1380 / B

NCP1380 / C

NCP1380 / D

OTP

Yes

Yes

OVP

Yes

Yes

Yes

Yes

Brown−Out

Yes

Yes

Auto−Recovery

Overcurrent

Protection

Yes

Yes

Latched

Overcurrent

Protection

Yes

Yes

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