LD5532 datasheet(1/18 Pages) LEADTREND

номер детали	LD5532

подробное описание детали	Green-Mode PWM Controller with Frequency Swapping and Audio Noise Prevention

PDF	18 Pages

Scroll/Zoom	100%

производитель	LEADTREND [Leadtrend Technology]

домашняя страница	https://www.leadtrend.com.tw/

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LD5532

07/08/2014

1

Leadtrend Technology Corporation

www.leadtrend.com.tw

LD5532-DS-00 July 2014

Green-Mode PWM Controller with Frequency Swapping and

Audio Noise Prevention

REV. 00

General Description

The LD5532 is built with several functions, audio noise

prevention, 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.

It includes low startup current, green-mode power-saving

operation, leading-edge blanking of the current sense and

internal slope compensation.

It also features protections

of OLP (Over Load Protection) and OVP (Over Voltage

Protection)

to

prevent

circuit

from

damage

under

abnormal conditions.

Furthermore, the Frequency Swapping function is also

built-in 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 (<1.5

A)

 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/-500mA Driving Capability

 Grouping Frequency Limitation for Audio Noise

Applications

 LCD Monitor/TV Power

 Switching AC/DC Adaptor

 Open Frame Switching Power Supply

Typical Application

EMI

Filter

BNO

OUT

CS

VCC

GND

COMP

LD5532

photocoupler

AC

input

DC

Output

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