Datasheet > LD7513A

LD7513A

更新时间： 2025-04-17 01:22:35

品牌	Logo	应用领域
通嘉科技 - LEADTREND		/
页数	文件大小	规格书
15页	459K
描述
Primary Side Quasi-Resonant BJT Controller with CV/CC Operation

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LD7513A 数据手册

LD7513A

11/15/2013

Primary Side Quasi-Resonant BJT Controller

with CV/CC Operation

Rev. 00

General Description

Features

The LD7513A is an excellent primary side feedback BJT

controller with CV/CC operation, integrated with several

functions of protections. It minimizes the component

counts and is available in a tiny SOT-26 package. Those

make it an ideal design for low cost applications.

 Primary-Side Feedback Control with Quasi-Resonant

Operation

 Direct Drive of BJT Switch

 Constant Voltage within 5%

 Built-In Adjustable Load Regulation Compensation

 Constant Current Control

It provides functions of ultra-low startup current,

green-mode power-saving operation and leading-edge

blanking of the current sensing. Also, the LD7513A

features Internal OTP (Over Temperature Protection) and

OVP (Over Voltage Protection) to prevent the circuit from

being damaged due to abnormal conditions.

 Ultra-Low Startup Current (<1.9A)

 0.5mA Low Operating Current at Light Load

 75 kHz Maximum Switching Frequency.

 Current Mode Control

 Green Mode Control Improve Efficiency

 LEB (Leading-Edge Blanking) on CS Pin

 Built-in Soft Start

In most cases, the power supply with primary-side

feedback controller would accompany with some serious

load regulation effect. To deal with this problem, the

LD7513A consists of dedicated load regulation

compensation circuit to enhance its performance.

 VCC OVP (Over Voltage Protection)

 FB Pin Open/Short Protection

 Internal OTP (Over Temperature Protection)

Applications



Mobile Phone Adapter



Lower Power AC/DC Adapter

Typical Application

Input

EMI

Filter

Input

VCC

OUT

LD7513A

GND

COMP

Leadtrend Technology Corporation www.leadtrend.com.tw

LD7513A-DS-00 November 2013

12 3 4 5 6 7...15

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