2013/05/13

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EM8635

Green mode PWM Flyback Controller with Brown-Out Protection

General Description

EM8635 is a high performance, low startup

current, low cost, current mode PWM controller

with green mode power saving. The EM8635

integrates functions of Soft Start(SS), Under Voltage

Lockout(UVLO),

Leading

Edge

Blanking(LEB),

internal

Over

Temperature

Protection(OTP),

internal slope compensation. The EM8635 also

features

more

protection

like

Over

Load

Protection(OLP), Brown-out Protection(BNO) and

Over Voltage Protection(OVP) to prevent circuit

damage occurred under abnormal conditions.

The EM8635 provides the users a superior

AC/DC

power

application

of

high

efficiency,

excellent

EMI

performance,

low

external

component counts and lower cost solution.

Ordering Information

Part Number

Package

Remark

EM8635J

SOT-23-6

Features

Ultra Low Start Up Current (6uA)

Current Mode Control

Soft Start Function

Built-in Slope Compensation

Internal Leading-edge Blanking

Over Voltage Protection (OVP) on VDD pin

Over Load Protection (OLP)

Cycle-by-cycle Current Limit

Feedback Open Protection

Brown-out Protection

Internal Over Temperature Protection (OTP)

Constant Output Power Limit (Full AC Input

Range)

Internal Frequency Jittering for Excellent

EMI performance

Applications

Switching AC/DC Adaptor and charger

Open-Frame SMPS

Typical Application Circuit

EM8635

AC

INPUT

BNO

COMP

GND

CS

GATE

VDD

EMI

Filter

+

DC

OUTPUT