LD7537 datasheet(1/16 Pages) LEADTREND

tên linh kiện	LD7537

Giải thích chi tiết về linh kiện	Green-Mode PWM Controller with Frequency Swapping and Integrated Protections

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LD7537

12/15/2011

1

Leadtrend Technology Corporation

www.leadtrend.com.tw

LD7537-DS-01a December 2011

Green-Mode PWM Controller with Frequency Swapping

and Integrated Protections

Rev. 01a

General Description

The LD7537 is built-in with several functions, protection

and EMI-improved solution in a tiny package. It takes less

components counts or circuit space, especially ideal for

those total solutions of low cost.

The implemented functions include low startup current,

green-mode

power-saving

operation,

leading-edge

blanking of the current sensing and internal slope

compensation.

It also features more protections like

OLP (Over Load Protection) and OVP (Over Voltage

Protection) to prevent circuit damage occurred under

abnormal conditions.

Furthermore, the Frequency Swapping function is to

reduce the noise level and thus helps the power circuit

designers to easily deal with the EMI filter design by

spending minimum amount of component cost and

developing time.

Features

High-Voltage CMOS Process with Excellent ESD

protection

Very Low Startup Current (<20

μA)

Current Mode Control

Green Mode Control

UVLO (Under Voltage Lockout)

LEB (Leading-Edge Blanking) on CS Pin

Internal Frequency Swapping

Internal Slope Compensation

OVP (Over Voltage Protection) on Vcc Pin

Brownout Protection

OLP (Over Load Protection)

300mA Driving Capability

Applications

Switching AC/DC Adaptor and Battery Charger

Open Frame Switching Power Supply

Typical Application

EMI

Filter

BNO

OUT

CS

VCC

GND

COMP

LD7537

photocoupler

AC

input

DC

Output

Free Datasheet http://www.nDatasheet.com

Số phần tương tự - LD7537

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Mô tả tương tự - LD7537

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