SGM3725中文资料One-Wire Dimming, 38V Boost LED Driver数据手册SGMICRO规格书

描述 Description

The SGM3725 is a high efficiency constant current LED driver with a 1.1MHz PWM boost converter. The internal low-side N-channel MOSFET and high switching frequency make the SGM3725 easy to use small components and optimized for compact solutions.
The SGM3725 is capable of driving either up to 10 LEDs in series for 38V output or total 260mA current with 3 LEDs in series per string while achieving high conversion efficiency.
32-step FB reference voltage can be programmed by one-wire dimming interface. Compared to normal PWM dimming control, it can avoid audible noise and reduce inrush current.
The SGM3725 provides very low shutdown current. It also includes a comprehensive set of protection features such as over-voltage protection, cycle-by- cycle input current limit and thermal shutdown.
The SGM3725 is available in a Green TSOT-23-6 package. It operates over an ambient temperature range of -40℃ to +85℃.

特性 Features

• Input Voltage Range: 2.7V to 5.5V

• Support up to 10 LEDs in Series

• Integrated 40V/1.35A Switch

• High Efficiency PWM Boost Converter

• Low Feedback Voltage: 200mV

• 500kΩ Pull-Down Resistor on CTRL Pin

• One-Wire Dimming Interface

• Switching Frequency: 1.1MHz

• 38V LED Open Protection

• Automatic Soft-Start for Reducing Inrush Current

• Less than 1μA Shutdown Current

• -40℃ to +85℃ Operating Temperature Range

• Available in a Green TSOT-23-6 Package

应用 Application

LED Backlighting
Mobile Phones and Digital Photo Frames
Portable Devices
Automotive Navigation