SGM3138 data sheet and product information

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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The SGM3138 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 SGM3138 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 SGM3138 supports up to 6 LEDs for total maximum 120mA current. The LED reference current is set through an internal resistor. The SGM3138 contains a 4-bit digital-to-analog converter for 16-step LED current control. The LED current can be set between 1.25mA and 20mA by a serial pulse input signal into the EN/SET pin.

The SGM3138 provides less than 1μA shutdown current and soft-start function. Built-in soft-start circuitry avoids excessive inrush current during startup and mode transition.

The SGM3138 is available in a Green TQFN-3×3-16L package. It operates over an ambient temperature range of-40℃ to +85℃.

FEATURES

Input Voltage Range: 2.7V to 5.5V
Support to 6 LEDs at 20mA Each
16-Step Brightness Control Through One-Wire Interface
1× and 1.5× Charge Pump for High Conversion Efficiency
Switching Frequency: 1MHz
±5% 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-3×3-16L Package

APPLICATIONS

White LED Backlighting

Mobile Phones, MP3s

Digital Still Cameras

LCD Displays

Ordering Information

Part Number	Status	Package	Pins	Pd-Free	RoHS	REACH	Green	MSL Rating	Operating Temperature Range	Material Content	Reliability Report	Unit Resale Price* (Volume Range: in USD)	Lead Time** (Volume Range: Days)
SGM3138YTQ16G/TR	Obsolete	TQFN-3×3-16L	16	Yes	Yes	Yes	Yes		-40℃ to +85℃	View	View

* 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.

SGM3138

6-Channel Charge Pump White LED Driver with Low Dropout Current Source