Datasheet > SGM3743

SGM3743

更新时间： 2024-11-21 11:14:59

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
14页	848K
描述
2-Channel White LED Driver for Smart Phone

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中文翻译

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SGM3743 数据手册

SGM3743

2-Channel White LED Driver for Smart Phone

GENERAL DESCRIPTION

FEATURES

The SGM3743 is a 2-channel white LED driver with

high efficiency boost regulator. With an internal

40V/1.5A power MOSFET, it is well suited for smart

phone backlight applications powered by 1-cell Li-Ion

battery. The supply voltage operates from 3V to 18V.

● Input Voltage Range: 3V to 18V

● Support up to 30mA Current per String

● Integrated 40V/1.5A MOSFET

● Up to 90% Efficiency

● Adaptive Boost Regulator

● Switching Frequency: 1.2MHz

The boost output has an adaptive voltage regulation

with enough low headroom voltage. The SGM3743 is

capable of driving up to 10S2P white LEDs while

achieving high efficiency. It supports both PWM

dimming control and one-wire digital dimming control. A

programmable 9-bit brightness code allows for LED

brightness control.

● Optimized Rise Time and Fall Time to Reduce

EMI on SW Pin

● 1% Regulated LED Current Matching and Accuracy

● Very Low Headroom Voltage: 90mV

● Independent Digital and PWM Dimming Control

● One-Wire Digital Dimming Interface

● PWM Dimming Interface

The SGM3743 includes a comprehensive set of

protection features such as 38.5V over-voltage

protection, over-current protection and thermal

shutdown. Built-in soft-start circuitry avoids excessive

inrush current during startup.

● Up to 9-Bit Resolution for LED Brightness

● Automatic Soft-Start for Reducing Inrush Current

● Dimming Stable in More than 1:500 PWM Range

● PFM Mode at Light Load

● Support 4.7μH Inductor

● Protection Features

The SGM3743 is available in a Green WLCSP

-1.32×1.32-9B package. It operates over an ambient

temperature range of -40℃ to +85℃.

 Over-Voltage Protection

 LED Open or Short Protection

 Thermal Shutdown

● -40℃ to +85℃ Operating Temperature Range

● Available in a Green WLCSP-1.32×1.32-9B Package

TYPICAL APPLICATION CIRCUIT

10μH

V_BAT

3V to 18V

APPLICATIONS

10Ω

1μF

VIN

1μF

Smart Phones

SGM3743

1μF

GPS Receivers

Handheld Devices

Enable

PWM Dimming

PWM

IFB1

IFB2

Backlight for Media Form Factor

LCD Displays with 1-Cell Battery

COMP

ISET

330nF

R_ISET

63.4kΩ

GND

SG Micro Corp

FEBRUARY 2021 – REV. A. 1

www.sg-micro.com

12 3 4 5 6 7...14

中文翻译

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与SGM3743相关器件

型号	品牌	获取价格	描述	数据表
SGM3750	SGMICRO	获取价格	White LED Driver with PWM Dimming Control
SGM3752	SGMICRO	获取价格	38V High Efficiency, Boost White LED Driver with PWM Dimming Control
SGM3756	SGMICRO	获取价格	38V High Efficiency, Boost White LED Driver with PWM Dimming Control
SGM3758	SGMICRO	获取价格	38V High Efficiency, Boost White LED Driver with Strobe Interface for Flash Mode
SGM3759	SGMICRO	获取价格	38V High Efficiency, Boost White LED Driver with Strobe Interface for Flash Mode
SGM37603	SGMICRO	获取价格	Highly Efficient 3-String White LED Driver
SGM37603A	SGMICRO	获取价格	Highly Efficient 3-String White LED Driver
SGM37604A	SGMICRO	获取价格	Highly Efficient 4-String White LED Driver
SGM3766	SGMICRO	获取价格	38V High Efficiency, Boost White LED Driver with PWM Dimming Control
SGM3785	SGMICRO	获取价格	2MHz, 1.5A Flash LED Driver

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