The SC4541 from Semtech is a LED Driver IC with Input Voltage 2.9 to 22 V, Output Current 100 to 200 mA, Number of Channel 1, Switching Frequency 1600 to 2400 KHz, Operating Temperature Range -40 to 85 Degree C. Tags: Surface Mount, DC-DC LED Driver. More details for SC4541 can be seen below.