Datasheet > SGM3756

SGM3756

更新时间： 2024-11-21 11:12:51

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
15页	725K
描述
38V High Efficiency, Boost White LED Driver with PWM Dimming Control

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SGM3756 数据手册

SGM3756

38V High Efficiency, Boost White

LED Driver with PWM Dimming Control

GENERAL DESCRIPTION

FEATURES

The SGM3756 is an asynchronous Boost WLED driver

with high efficiency, low EMI and high output voltage.

The Boost converter integrates a 40V, 1.5A internal

FET which operates at 1.2MHz switching frequency. Its

strong driving ability can drive single or multiple parallel

LED strings, which can be used as LED driver for smart

phone and tablet backlight.

• Input Voltage Range: 2.7V to 5.5V

• 1:250 Stable Luminance Dimming

• Low EMI by Conducting Ringing Cancelling

• Improved PSRR for Waveless Lighting

• Up to 90% Efficiency

• Switching Frequency: 1.2MHz

• Integrated 40V/1.5A Switch

• Feedback Voltage: 200mV

The default LED current can be programmed by the

external current-sense resistor R_SET. By varying the

duty cycle of the PWM signal applied to the CTRL pin,

the internal reference voltage is adjusted, which

ultimately adjusts the LED sink current. With full PWM

duty cycle, the internal reference voltage V_REFis 200mV

(TYP). The SGM3756 is essentially a driver that adopts

analog dimming control, and it will not produce audible

noise on the output capacitor. The SGM3756 integrates

ringing cancellation, and it can effectively reduce EMI

noise in DCM mode. The SGM3756 provides excellent

line regulation and load regulation, as well as excellent

load transient response. The SGM3756 also features

various protection functions such as open LED

protection, OCP protection and thermal shutdown

protection.

• PWM Dimming Control

• 38V Open LED Protection for 10 LEDs in Series

• Automatic Soft-Start for Reduced Inrush Current

• Under-Voltage Lockout Protection

• Thermal Shutdown

• -40℃ to +85℃ Operating Temperature Range

• Available in a Green TDFN-2×2-6L Package

APPLICATIONS

Portable Devices Backlight

Small and Medium Size White LCD Display Backlight

The SGM3756 is available in a Green TDFN-2×2-6L

package. It operates over an ambient temperature

range of -40℃ to +85℃.

SG Micro Corp

SEPTEMBER2022–REV. A. 1

www.sg-micro.com

12 3 4 5 6 7...15

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