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Semtech SC644
Charge Pump LED Driver for 6BL + 4LDO + SemPulse® Interface
The SC644 is a high efficiency charge pump LED driver using Semtech’s proprietary charge pump technology. Performance is optimized for use in single cell Li-ion battery applications.
概览
Features
- Input supply voltage range — 2.9V to 5.5V
- Very high efficiency charge pump driver system with three modes — 1x, 1.5x, and 2x
- Six programmable current sinks with 29 increments from 0mA to 25mA
- One programmable 100mA low-noise LDO regulator
- Three programmable 150mA low-noise LDO regulators
- Programmable driver configurations for main and sub-display backlight
- Fade-in/fade-out feature for main and sub display backlight
- SemPulse® single wire interface
- Backlight current accuracy — ±1.5% typical
- Backlight current matching — ±0.5% typical
- Automatic sleep mode with LEDs off
- Shutdown current — 0.1μA typical
- Ultra-thin package — 3 x 3 x 0.6 (mm)
- Fully WEEE and RoHS compliant
应用
- Cellular phones, smart phones, and PDAs
- LCD display modules
- Portable media players
- Digital cameras and GPS units
- Display backlighting and LED indicators
Packaging
MLPQ-UT-20
Order Codes
- SC644ULTRT: Lead-Free, WEEE and RoHS Compliant, 3000pcs Tape and Reel Only
Diagrams and Specs
Block Diagram
Click diagram to enlarge