GENERAL DEscriptION

The SGM3727 is a high efficiency current-regulated white LED driver with a boost DC/DC converter. With an internal 38V/1A power MOSFET, the SGM3727 supports up to 10 white LEDs in series and achieves uniform brightness. 32-step LED current can be set by a serial pulse signal into the EN/SET pin.

The SGM3727 includes a comprehensive set of protection features such as over-voltage protection, cycle-by-cycle current limit and thermal shutdown. Built-in soft-start circuitry avoids excessive inrush current during startup.

The SGM3727 is available in a Green TDFN-2×2-8L package. It operates over an ambient temperature range of -40℃ to +85℃.

FEATURES

• Integrated 38V/1A Switch with 0.5Ω On-Resistance

• High Efficiency Boost Bias Supply

• Support up to 10 LEDs in Series per String

• 32-Step LED Brightness Control through One-Wire Interface

• Automatic Soft-Start for Reducing Inrush Current

• No Leakage from VIN to GND through LED String

• Protection Features

  Programmable Over-Voltage Protection

  Cycle-by-Cycle Current Limit

  Thermal Shutdown

• -40℃ to +85℃ Operating Temperature Range

• Available in a Green TDFN-2×2-8L Package

APPLICATIONS

Smart Phones and Portable Media Players

TFT LCD Displays

GPS/PND