2013/01/30

1

REV.A.3

EM8671/A

HV Start-up Green-mode PWM Controller with Brown-Out Protection

General Description

EM8671/A is a high performance, low cost, HV

Start-up, current mode PWM controller with green

mode power saving. The EM8671/A integrates

functions

of

Soft

Start(SS),

Under

Voltage

Lockout(UVLO),

Leading

Edge

Blanking(LEB),

internal

Over

Temperature

Protection(OTP),

internal slope compensation. The EM8671/A also

features

more

protection

like

Over

Load

Protection(OLP) and Over Voltage Protection(OVP)

to

prevent

circuit

damage

occurred

under

abnormal conditions. The EM8671/A also has line

under-voltage protection (Brown-out Protection).

Ordering Information

Part Number

Package

Deep burst CS level

EM8671G

SOP-8

0.3V

EM8671G7

SOP-7

0.3V

EM8671AG

SOP-8

0.1V

EM8671AG7

SOP-7

0.1V

Features

700V High Voltage Start up Circuit

Current Mode Control

Soft Start Function

Built-in Slope Compensation

Internal Leading-edge Blanking

Brown in/out Protection

Over Voltage Protection (OVP) on VCC pin

Over Load Protection (OLP)

Cycle-by-cycle Current Limit

Feedback Open Protection

Internal Over Temperature Protection (OTP)

Constant Output Power Limit (Full AC Input

Range)

Excellent EMI performance

Applications

LCD Monitor Power Supply

Open-Frame SMPS

Typical Application Circuit