Datasheet > LD5857

LD5857

更新时间： 2022-02-26 12:59:43

品牌	Logo	应用领域
通嘉科技 - LEADTREND		/
页数	文件大小	规格书
12页	1441K
描述
Boost Controller for LED Backlight

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LD5857 数据手册

LD5857

4/15/2014

Boost Controller for LED Backlight

REV: 00

General Description

Features

The LD5857 is a wide-input asynchronous current mode

boost controller, capable to operate in the range between

9V and 28V and to generate 12V of voltage to the GATE

pin of MOSFET to reduce thermal loss. The current mode

control architecture enhances transient response and

simplifies the loop compensation. The DIM input enables

the brightness control for LED Backlight or LED lighting.



Wide Input Range: 9V to 28V

Current Mode Control

0.3V LED Feedback Current Sensing Reference

Fixed Switching Frequency

Cycle-by-Cycle Current Limit

Over Temperature Protection

High performance of Dimming Linearity.

Programmable PWM Dimming Input and Analog

Dimming Output with Software Control

The device also features internal slope compensation,

input voltage under-voltage lockout, output voltage short

circuit protection, cycle-by-cycle current limit and thermal

shutdown protection.

Applications



LED TV Backlight

LED Monitor Backlight

LED lighting

Typical Application

V_IN

V_OUT

R_A

R_B

R_CS

VCC

VCC DRV

DIM

LD5857

R_FB

OVP COMP GND

C_OVP

Application circuit

Leadtrend Technology Corporation www.leadtrend.com.tw

LD5857-DS-00 April 2014

12 3 4 5 6 7...12

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