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Semtech SC657
Charge Pump LED Driver for 5BL + SemPulse® Interface
The SC657 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
- Five programmable current sinks — 0mA to 25mA
- Up to three LED grouping options
- Fade-in/fade-out feature for main LED bank
- Charge pump frequency — 250kHz
- SemPulse® single wire interface
- Backlight current accuracy — ±1.5% typical
- Backlight current matching — ±0.5% typical
- LED float detection
- Automatic sleep mode (LEDs off) — IQ = 60μA (typ.)
- Shutdown current — 0.1μA (typical)
- Ultra-thin package — 2 x 2 x 0.6 (mm)
- Fully WEEE and RoHS compliant
应用
- Cellular phones, smart phones, and PDAs
- LCD modules
- Portable media players
- Digital cameras
- Personal navigation devices
- Display/keypad backlighting and LED indicators
Packaging
MLPQ-UT-20 (3 X 3 mm)
Order Codes
- SC657ULTRT: Lead-Free, WEEE and RoHS Compliant, 3000pcs Tape and Reel Only
Diagrams and Specs
Block Diagram
Click diagram to enlarge