15815503065
SGM3781 LED闪光灯驱动器IC
品牌1: SGM/圣邦微
输入电压: 3-5V
效率: 90%
封装: TDFN-3×2-14L
报价: 0.50元/个
最小起订: 3000 个
库存: 9999990000 个
发货期限: 自买家付款之日起 2 天内发货
有效期至: 长期有效
发布时间: 2023-03-16 13:33
浏览次数: 100
手机号: 15815503065
电话: 0755-83538626
在线咨询: 点击这里给我发消息
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详细信息

GENERAL DEscriptION

The SGM3781 is a highly integrated boost DC/DC converter with 2MHz fixed fre High switching frequency makes it easy to use tiny components and optimized for portable photo flash. The SGM3781 is ideal for high power flash LEDs which are suited for mobile phone camera modules and digital still cameras.

The SGM3781 offers excellent flexibility to enter flash mode and movie/torch mode through the ENF and ENM pins respectively. The maximal flash current and movie/torch current are respectively programmed through external resistors (RSETF and RSETM), which can provide simple control for the flash LED solution. When both ENF and ENM pins are driven high, the LED current is set to movie/torch current through RSETM resistor.

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.

The SGM3781 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.

The SGM3781 is available in a Green TDFN-3×2-14L package. It operates over an ambient temperature range of -40℃ to +85℃.

FEATURES

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

Flash Mode Diming and Movie/Torch Mode Dimming through PWM Signal

Independent Resistors Set Flash Current and Movie/Torch Current Respectively

Integrated Thermal Regulation Control

330kΩ Pull-Down Resistor on ENM and ENF Pins

PWM Dimming Frequency Range: 10kHz to 200kHz

Protection Features

Output Over-Voltage Protection

LED Open or Short Protection

Cycle-by-Cycle Current Limit

Less than 1μA Shutdown Current

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

Temperature Range: -40℃ to +85℃

APPLICATIONS

Portable E


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  • 电话:0755-83538626
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