Datasheet > SGM3766

SGM3766

更新时间： 2024-11-19 11:16:11

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
11页	873K
描述
38V High Efficiency, Boost White LED Driver with PWM Dimming Control

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SGM3766 数据手册

SGM3766

38V High Efficiency, Boost White

LED Driver with PWM Dimming Control

GENERAL DESCRIPTION

FEATURES

The SGM3766 is a high efficiency white LED driver with

a 1.2MHz boost converter. With the fixed switching

frequency and an internal 40V/2.75A switch FET, the

SGM3766 is designed for powering single or parallel

LED strings for various size panel backlighting.

● Input Voltage Range: 2.7V to 5.5V

● Integrated 40V/2.75A Switch

● Up to 90% Efficiency

● Switching Frequency: 1.2MHz

● Feedback Voltage: 200mV

The SGM3766 is capable of driving 10 white LEDs in

series. The FB feedback voltage is regulated at 200mV

typically. The default LED current is programmed by an

external R_SETresistor. During the operation, the LED

current can be controlled by applying a PWM signal to

the CTRL pin. The feedback voltage depends on the

PWM signal duty cycle. For PWM dimming control,

there are no audible noises on the output capacitor.

● PWM Dimming Control

● 38V LED Open Protection for 10 LEDs

● Automatic Soft-Start for Reducing Inrush Current

● 1:500 Stable Luminance Dimming

● Low EMI by Conducting Ringing Cancelling

● Improved PSRR for Waveless Lighting

● Protection Features

 Over-Voltage Protection

The SGM3766 integrates LED open protection. It

prevents the device from damaging due to the over-

voltage during LED open conditions.

 Under-Voltage Lockout Protection

 Thermal Shutdown

• -40℃ to +85℃ Operating Temperature Range

• Available in a Green TSOT-23-5 Package

The SGM3766 is available in a Green TSOT-23-5

package. It operates over an ambient temperature

range of -40℃ to +85℃.

APPLICATIONS

Smart Phone and Tablet Backlighting

Handheld Computers, PDAs, GPS Receivers

Backlight for Media Form Factor Displays

TYPICAL APPLICATION

10μH

Up to 3S30P

V_IN

VIN

C_OUT

C_IN

10μF

22μF

SGM3766

Enable and

PWM Dimming Control

CTRL

GND

R_SET

0.33Ω

Figure 1. Typical Application

SG Micro Corp

AUGUST 2018 – REV. A

www.sg-micro.com

12 3 4 5 6 7...11

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