SC4541

SC4541 POWER MANAGEMENT Features High Frequency LED Driver with Integrated Schottky and Simple Interconnect Description „„ 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 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. The device includes a current mode PWM controller, 260mA power switch, and high performance Schottky rectifier. The LED driver eliminates external compensation components for minimum solution size. The wide input voltage range and low standby current are ideal for portable devices. The high input voltage allows d...