One-Wire Dimming, 38V Boost LED Driver
One-Wire Dimming, 38V Boost LED Driver

The SGM3735 is a high efficiency constant current LED driver with a 1MHz PWM boost converter. An internal low-side N-channel MOSFET and a high switching frequency make the SGM3735 easy to use small components and optimized for compact solutions.

The SGM3735 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 SGM3735 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 SGM3735 is available in a Green TDFN-2×2-8L package. It operates over an ambient temperature range of -40 to +85.



  • 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 EN/SET Pin

  • One-Wire Dimming Interface

  • Switching Frequency: 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


LED Backlighting

Mobile Phones and Digital Photo Frames

Portable Devices

Automotive Navigation

Part Number Status Package Pins Pb-Free Temp Range
SGM3735YTDE8G/TR Production TDFN-2×2-8L 8 Y -40℃ to +85℃ Samples