SC621AULTRT集成電路（IC）的LED驅(qū)動(dòng)器規(guī)格書(shū)PDF中文資料

SC621AULTRT屬于集成電路（IC）的LED驅(qū)動(dòng)器。由Semtech Corporation制造生產(chǎn)的SC621AULTRTLED 驅(qū)動(dòng)器器件屬于 LED 驅(qū)動(dòng)器電源管理集成電路 (PMIC) 系列，可通過(guò)標(biāo)稱(chēng)固定電壓的電源為負(fù)載（通常為發(fā)光二極管）提供電流，并且電流可控。它與用于電壓調(diào)節(jié)的類(lèi)似產(chǎn)品的主要區(qū)別在于，這類(lèi)器件提供較低的反饋電壓（以提高系統(tǒng)能效），而且通常可對(duì)器件工作點(diǎn)進(jìn)行外部控制，可在照明應(yīng)用中用于實(shí)現(xiàn)調(diào)光功能。

Description

The SC621A is a high efficiency 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

■ Two programmable 200mA low-noise LDO regulators

■ Charge pump frequency — 250kHz

■ I2C compatible interface — up to 400kHz

■ 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

■ Lead-free and halogen-free

■ WEEE and RoHS compliant

Applications

■ Cellular phone backlighting and flash

■ PDA backlighting and flash

■ Camera I/O and core power