Datasheet > SGM3785

SGM3785

更新时间： 2024-11-19 11:08:15

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
13页	553K
描述
2MHz, 1.5A Flash LED Driver

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中文翻译

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SGM3785 数据手册

SGM3785

2MHz, 1.5A Flash LED Driver

GENERAL DESCRIPTION

FEATURES

The SGM3785 is a highly integrated boost DC/DC

converter with 2MHz fixed frequency. High switching

frequency makes it easy to use tiny components and

optimized for portable photo flash. The SGM3785 is

ideal for high power flash LEDs which are suited for

mobile phone camera modules and digital still cameras.

● Input Voltage Range: 3V to 5V

● Up to Total 1.5A or Each 0.75A LED Current

● Up to 90% Efficiency

● Dual Flash LED Outputs

● Tiny Inductor: 1.0μH

● 2MHz Boost Converter

● Separate Flash Mode Enable and Movie/Torch

Mode Enable Control Pins

The SGM3785 offers excellent flexibility to enter flash

mode and movie/torch mode through the ENF and

ENM pins respectively. Flash mode is usually used with

660ms timer control to generate a high intensity flash.

The maximal flash current and movie/torch current are

respectively programmed through external resistors

(R_SETFand R_SETM), which can provide simple control for

the flash LED solution. The real LED current in flash

mode and movie/torch mode can be programmed by

external PWM signal on ENM pin.

● Flash Current and Movie/Torch Current can be

Programmed through PWM Signal on ENM Pin

● Independent Resistors Set Flash Current and

Movie/Torch Current Respectively

● Integrated Thermal Regulation Control

● 660ms Flash Timer Control

● 330kΩ Pull-Down Resistor on ENM and ENF Pins

● Protection Features

 Output Over-Voltage Protection

 LED Open or Short Protection

The D1 and D2 pins can be tied together to drive higher

power single flash LEDs, sinking up to 1.5A continuous

current. The integrated thermal regulation in flash mode

limits the temperature of the device. It can prevent the

device from triggering thermal shutdown and provide

the maximum LED output current continuously.

 Cycle-by-Cycle Current Limit

● Less than 1μA Shutdown Current

● Available in a Green TDFN-3×2-14L Package

● Temperature Range: -40℃ to +85℃

The SGM3785 provides very low shutdown current. It

also includes a comprehensive set of protection

features such as over-voltage protection, LED open or

short protection and thermal shutdown.

APPLICATIONS

Portable Equipment

The SGM3785 is available in a Green TDFN-3×2-14L

package. It operates over an ambient temperature

range of -40℃ to +85℃.

SG Micro Corp

JANUARY 2019 – REV. A. 4

www.sg-micro.com

12 3 4 5 6 7...13

中文翻译

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与SGM3785相关器件

型号	品牌	获取价格	描述	数据表
SGM3785S	SGMICRO	获取价格	2MHz, 1.5A Flash LED Driver
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SGM37891	SGMICRO	获取价格	单路，无电感具有手电筒模式的 LED 闪光驱动器
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SGM37895	SGMICRO	获取价格	独立双路，无电感具有手电筒模式的 LED 闪光驱动器
SGM3795	SGMICRO	获取价格	700mA Quad Channel Constant Current LED Driver
SGM3799	SGMICRO	获取价格	0.5Ω, Low Voltage Dual, DPDT Analog Switch
SGM3803	SGMICRO	获取价格	90% Efficient Synchronous Step-Up Converter with 200mA Negative Charge Pump Inverter
SGM3804	SGMICRO	获取价格	Single Inductor, Positive/Negative Dual Output, Buck/Boost Converter
SGM38042	SGMICRO	获取价格	Single Inductor Triple Output AMOLED Display Power Supply

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