Description

The SC623 is a high efciency charge pump LED driver using Semtech’s proprietary mAhXLifeTM technology. Performance is optimized for use in single-cell Li-ion battery applications.

Features

■ Input supply voltage range — 3.0V to 5.5V

■ Charge pump modes — 1x, 1.5x and 2x

■ Four programmable current sinks with 32 steps from

0.5mA to 25mA

■ Flash LED — 400mA max in flash mode, 250mA max

continuous for spotlight

■ Charge pump frequency — 250kHz

■ SemWireTM single wire interface — up to 75kbit/s

■ Backlight current accuracy ±1.5 typical

■ Backlight current matching ±0.5 typical

■ Programmable fade-in/fade-out for main backlight

■ External flash control pin to sync with camera

■ Optional 1s flash time out

■ Automatic sleep mode (LEDs off ) — IQ = 100μA

■ Low shutdown current — 0.1μA (typical)

■ Ultra-thin package — 3mm x 3mm x 0.6mm

■ Fully WEEE and RoHS compliant

Applications

■ Cellular phone backlighting and flash

■ PDA backlighting and flash

SC623ULTRT属于集成电路（IC） > LED 驱动器。Semtech Corporation制造生产的SC623ULTRTLED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。