Datasheet > SGM37604A

SGM37604A

更新时间： 2024-11-19 11:08:19

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
18页	930K
描述
Highly Efficient 4-String White LED Driver

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SGM37604A 数据手册

SGM37604A

High Efficiency 4-String White LED Driver

GENERAL DESCRIPTION

FEATURES

● 12-Bit Resolution for Dimming Control

● Up to 90% Boost Efficiency

● Switching Frequency: 1.2MHz

● Support 1 to 4 LED Strings in Parallel at Maximum

29.5V Output

The SGM37604A is a high efficiency 4-string white LED

driver with a 1.2MHz boost converter. The supply

voltage operates from 3V to 24V. The SGM37604A is

capable of driving up to 8 LEDs in series for 40mA

maximum LED current per string while achieving high

conversion efficiency. An adaptively current-regulated

method allows different LED string voltages while LED

current remains in regulation. The LED current is

programmed through an I²C interface or a PWM signal

input. These features make it optimized for compact

solutions and ideal for LCD display backlighting.

● 11% LED Current Matching across Process,

Voltage and Temperature at I_LED= 12.21μA

● 1% LED Current Matching across Process,

Voltage and Temperature at I_LED= 25mA

● 11% LED Current Accuracy across Process,

Voltage and Temperature at I_LED= 12.21μA

● 3% LED Current Accuracy across Process,

Voltage and Temperature at I_LED= 25mA

● PWM Dimming Interface

The SGM37604A is available in Green WLCSP-

1.78×1.36-12B and TDFN-3×3-12L packages. It

operates over the -40℃ to +85℃ temperature range.

● Programmable I²C Interface

● Phase Shift Function

● Hybrid PWM + Current Dimming for Higher LED

Driver Optical Efficiency

APPLICATIONS

● Low EMI by Conducting Ringing Cancelling

● Protection Features

Power Source for Smart Phone and Tablet Backlighting

 Over-Voltage Protection

 Over-Current Protection

 Thermal Shutdown

TYPICAL APPLICATION

Up to 28V Output

VLF504012MT-100M

V_IN

3V to 24V

10μH

R₃

10Ω

C₁

22μF

C_OUT

1μF

C_IN

2.2μF

VIO

OUT

R₁

R₂

10kΩ

SGM37604A

SDA

SCL

LED1

LED2

LED3

LED4

SDA

SCL

PWM

HWEN

GND

Figure 1. Typical Application

SG Micro Corp

JANUARY 2019 – REV. A. 1

www.sg-micro.com

12 3 4 5 6 7...18

中文翻译

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