Product Summary

The SC662K 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. The charge pump provides backlight current utilizing six matched current sinks. The applications of the SC662K include Cellular phones, smart phones, and PDAs, LCD modules, Portable media players, Digital cameras, Personal navigation devices, Display/keypad backlighting and LED indicators.

Parametrics

SC662K absolute maximum ratings: (1)IN, OUT: -0.3 to +6.0V; (2)C1+, C2+: -0.3 to (VOUT + 0.3)V; (3)Pin Voltage — All Other Pins: -0.3 to (VIN + 0.3)V; (4)OUT Short Circuit Duration: Continuous; (5)ESD Protection Level: 4kV.

Features

SC662K features: (1)Input supply voltage range-2.9V to 5.5V; (2)Very high efficiency charge pump driver system with three modes-1x, 1.5x and 2x; (3)Six programmable current sinks-0mA to 25mA; (4)Up to three LED grouping options; (5)Fade-in/fade-out feature for main LED bank; (6)Selectable charge pump frequency-250kHz/1MHz; (7)SemPulse?single wire interface; (8)Backlight current accuracy-±1.5% typical; (9)Backlight current matching-±0.5% typical; (10)LED float detection; (11)Automatic sleep mode with all LEDs off; (12)Sleep mode quiescent current-60μA typical; (13)Shutdown current-0.1μA typical; (14)Ultra-thin package-2 x 2 x 0.6 (mm); (15)Lead-free and halogen-free; (16)WEEE and RoHS compliant.

Diagrams

SC662K block diagram