Products
Power Management
Semtech SC656
Charge Pump LED Driver for 7BL + Dual PWM Interfaces
Not recommended for new designs.
The SC656 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.
Overview
Features
- Input supply voltage range — 2.9V to 5.5V
- Charge pump modes — 1x, 1.5x and 2x
- PWM dimming control with low pass filter provides
- DC backlight current (not pulsed)
- Two independently configurable backlight banks
- PWM frequency range — 200Hz to 50kHz
- Seven adjustable current sinks — 500μA to 25mA
- Backlight current accuracy ±1.5% typical
- Backlight current matching ±0.5% typical
- LED float detection
- Charge pump frequency — 250kHz
- Low shutdown current — 0.1μA typical
- Ultra-thin package — 3 x 3 x 0.6(mm)
- Fully WEEE and RoHS compliant, and Halogen free.
Applications
- Cellular phones, smart phones, and PDAs
- LCD display modules
- Portable media players
- Digital cameras
- Personal navigation devices
- Display/keypad backlighting and LED indicators
Packaging
- MLPQ-UT-20
Order Codes
- SC656ULTRT: Lead Free, WEEE and RoHS Compliant, Halogen Free, 3,000 pcs, Tape and Reel Only
Diagrams and Specs
Block Diagram
Click diagram to enlarge