SC4541集成電路（IC）的LED驅(qū)動器規(guī)格書PDF中文資料

SC4541屬于集成電路（IC）的LED驅(qū)動器。由Semtech Corporation制造生產(chǎn)的SC4541LED 驅(qū)動器器件屬于 LED 驅(qū)動器電源管理集成電路 (PMIC) 系列，可通過標稱固定電壓的電源為負載（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)的類似產(chǎn)品的主要區(qū)別在于，這類器件提供較低的反饋電壓（以提高系統(tǒng)能效），而且通?？蓪ζ骷ぷ鼽c進行外部控制，可在照明應(yīng)用中用于實現(xiàn)調(diào)光功能。

Description

The SC4541 is a fully integrated, high voltage boost (stepup) and buck (step-down) LED driver. The input voltage range is 2.9V to 22V with output voltage up to 25V. The device is capable of driving up to 7 white LEDs. The high side sense enables a single-wire LED connection by taking advantage of the available system ground. This reduces connector cost and complexity.

Features

■ VIN Range — 2.9V to 22V

■ VOUT Range — Up to 25V

■ IOUT Range:

■ Up to 100mA (Boost)

■ Up to 200mA (Buck)

■ Drives Up to 7 Series WLEDs (Boost)

■ Drives Up to 5 Series WLEDs (Buck)

■ Integrated Schottky Rectifier

■ Single-Wire LED Connect

■ Current Mode Control

■ Frequency — 2.0MHz

■ No External Compensation

■ Direct PWM Dimming

■ 100:1 Range at 500Hz

■ Open-LED Protection — 27V

■ Low Shutdown Current < 1μA

■ Package Options:

■ Low Profile MLPD-UT, 6-pin 2x2 x0.6(mm)

■ SOT23, 6-pin 2.9x2.8 x1.45(mm)

■ Lead-free, Halogen-Free and WeEE/RoHS Compliant

Applications

■ Keypad Illumination

■ DSC and DSLR Display Backlight

■ Cellular Handsets

■ Automotive Lighting