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℃.
- 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
White LED Backlighting
Mobile Phones, MP3s
Digital Still Cameras
LCD Displays
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.
