NCP1336 데이터 시트보기 (PDF) - ON Semiconductor

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NCP1336

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

ON Semiconductor 

NCP1336A/B

PIN FUNCTION DESCRIPTION

Pin No. Pin Name

Function

1

OPP

Adjust the Over Power

Protection

2

OTP

Over−Temperature

Protection

3

Timer

Timer

4

ZCD

Zero Crossing Detection

5

Ct

Timing Capacitor

6

FB

Feedback Pin

7

CS

Current Sense

8

GND

−

9

DRV

Driver Output

10

VCC

Supplies the Controller

11

BO

Brownout

12

OVP

Over−Voltage Protection

13

NC

−

14

HV

High−Voltage Input

Pin Description

A negative voltage applied to this pin reduces the internal maximum peak

current setpoint. Connecting it to an auxiliary winding through a resistor

divider thus performs Over Power compensation. If grounded, OPP is null.

Connect an NTC between this pin and GND pin. Pin 2 features an internal

current source that biases the NTC. When the NTC pulls the pin down, the

circuit permanently latches−off.

Wiring a capacitor to ground helps selecting the timer duration.

Connected to the auxiliary winding, this pin detects the core reset event.

A capacitor connected to this pin acts as the timing capacitor in foldback

mode.

Hooking an optocoupler collector to this pin will allow regulation.

This pin monitors the primary peak current.

This pin is the controller ground.

This pin is the driver’s output to an external MOSFET.

This pin is connected to an external auxiliary voltage.

This pin is the brownout input.

By pulling this pin high, the controller can be permanently latched−off.

This pin is omitted for improved creepage.

Connected to the bulk capacitor, this pin powers the internal current source

to deliver a startup current.

OVERCURRENT PROTECTION ON NCP1336 VERSIONS

NCP1336 / A

NCP1336 / B

Auto−Recovery

Overcurrent protection

X

Latched

Overcurrent protection

X

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