Not Recommended for New Designs

700mA Buck/Boost Charge Pump LED Driver

SGM3141B is not recommended for new designs/obsolete. A similar product is available.

Synchronous Boost LED Flash Driver with 1.5A High-Side Current Source

Preview Image
Preview Image

The SGM3141B is a current-regulated buck/boost charge pump LED driver capable of driving 700mA output current. It is ideal for powering high brightness LEDs for camera flash applications. The SGM3141B has 1×/2× operation mode to control the output current for flash and torch modes. Both flash and torch modes can be used continuously until thermal shutdown occurs.

The supply voltage operates from 2.7V to 5.5V and is well suited for various applications powered by a 1-cell Li-Ion battery, as well as 3-cell or 4-cell NiCd, NiMH or Alkaline batteries. The SGM3141B automatically converts between boost and buck modes. Therefore, it ensures that LED current cannot be restricted by the forward voltage. High switching frequency makes it easy to use tiny components. Small 0603 current sense resistors can be used due to the low FB reference voltage.

The SGM3141B provides very low shutdown current and soft-start function. Built-in soft-start circuitry avoids excessive inrush current during startup. The SGM3141B also includes a comprehensive set of protection features such as over-voltage protection, over-current protection and thermal shutdown.

The SGM3141B is available in a Green TDFN-3×3-10L package and is specified over an ambient temperature range of -40 to +85.

  • Input Voltage Range: 2.7V to 5.5V

  • Up to 700mA Output Current

  • Up to 90% Efficiency in Torch Mode

  • Programmable Flash Current

  • Automatic 1× and 2×Modes for High Efficiency

  • No External Inductors

  • High Switching Frequency: 2.2MHz

  • Low Reference for Low Loss Sensing: 47mV

  • Less than 1μA Shutdown Current

  • Automatic Soft-Start for Reducing Inrush Current

  • Low Input and Output Ripple and Low EMI

  • Protection Features

    Output Over-Voltage Protection

    Over-Current Protection

    Thermal Shutdown

  • Available in a Green TDFN-3×3-10L Package


White LED Torch or Flash for Mobile Phones,

Camcorders and DSCs

Generic Lighting, Strobe and Flash Applications

White LED Backlighting

General Purpose High Current Boost

Ordering Information
Part Number
MSL RatingOperating Temperature RangeMaterial ContentReliability Report
Unit Resale Price*
(Volume Range: in USD)
Lead Time**
(Volume Range: Days)
Not Recommended for New Designs
-40℃ to +85℃
1-24 units : $0.7/unit
25-99 units : $0.6/unit
100-249 units : $0.5/unit
250-499 units : $0.4/unit
500-999 units : $0.35/unit
1000-9999 units : $0.26/unit
3K-9K : 14 days
10K-99K : 28 days
100K-999K : 70 days
1000K and above : 91 days

* The unit resale price is for reference purposes only. Please contact our distributors for a formal quotation.

** The lead time provided is for reference purposes only and is subject to change based on different circumstances.

SG Micro Corp (SGMICRO) specializes in the development, manufacturing and sales of high-performance and high-reliability integrated circuits for analog signal conditioning and system power management, offering innovative solutions to a broad range of applications in the industrial, automotive, communication, computing, consumer electronics, and medical equipment markets.
Privacy Policy Copyright © 2024 SG MICRO CORP All rights reserved.