Not Recommended for New Designs

8-Channel PWM Dimming Charge Pump White LED Driver

Preview Image
Preview Image

The SGM3145 is a current-regulated white LED driver with integrated low dropout current sources and a high efficiency charge pump. The charge pump has automatically selectable 1×/1.5× fractional operation modes. The SGM3145 is well suited for white LED applications powered by a Li-Ion battery due to small equivalent open-loop resistance in 1× mode.

The supply voltage operates from 2.7V to 5.5V. The SGM3145 supports up to 8 LEDs for 27mA maximum current per string. The LED reference current is set through an internal resistor. PWM dimming interface allows programmable LED current levels from 0mA to 27mA for brightness control. If the EN pin is logic low, the SGM3145 enters shutdown mode. Built-in soft-start circuitry avoids excessive inrush current during startup and mode transition.

The SGM3145 is available in a Green TQFN-3×3-20L package. It operates over an ambient temperature range of -40 to +85.

  • Input Voltage Range: 2.7V to 5.5V

  • Support up to 8 LEDs at 27mA Each

  • PWM Dimming Interface

  • 1× and 1.5× Charge Pump for High Conversion Efficiency

  • Switching Frequency: 0.93MHz

  • ±4.8% Regulated LED Current Matching

  • Built-in Soft-Start for Reducing Inrush Current

  • Low Input Ripple and Low EMI

  • Protection Features

    Over-Current Protection

    Under-Voltage Lockout

    Thermal Shutdown

  • Operating Temperature Range: -40 to +85

  • Available in a Green TQFN-3×3-20L Package


White LED Backlighting

Mobile Phones, MP3s

Digital Still Cameras

LCD Displays

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℃

* 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.
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