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SGM3124

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PWM Dimming, Charge Pump White LED Driver with Low Dropout Current Source

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The SGM3124 is a current-regulated white LED driver with integrated low dropout current sources and a high efficiency charge pump. The charge pump has 1×/1.5× fractional operation mode. The SGM3124 is designed for LCD display backlight applications.

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 ISET reference current is set through an external resistor on the ISET pin. The SGM3124 supports up to 3 LED strings for total maximum 120mA current. In addition, the charge pump with current control reduces input current ripple and ensures low EMI. Low capacitance makes the SGM3124 ideal for small battery-powered applications.

The SGM3124 is available in a Green TQFN-3×3-16L package. It operates over an ambient temperature range of -40 to +85.

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FEATURES
  • Input Voltage Range: 2.7V to 5.5V

  • Support up to 3 LEDs at 30mA Each

  • LED Brightness Control through PWM Signal

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

  • Switching Frequency: 1MHz

  • 0.5% Regulated Output 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

  • Available in a Green TQFN-3×3-16L Package

APPLICATIONS

Cellular Phones, Smart Phones

Digital Cameras, Camcorders, PDAs

Handheld PCs

Keypad Backlight

Ordering Information
Part Number
StatusPackagePinsPd-Free
RoHS
REACH
Green
MSL RatingOperating Temperature RangeMaterial ContentReliability Report
Unit Resale Price*
(Volume Range: in USD)
Lead Time**
(Volume Range: Days)
SGM3124YTQ16G/TR
Active
TQFN-3×3-16L
16
Yes
YesYesYes
-40℃ to +85℃
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* 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.

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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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