The IS32FL3746B-QWLA3-TR from Lumissil Microsystems is a LED Driver IC with Input Voltage 2.7 to 5.5 V, Output Current 32.1 to 36.9 mA, Operating Temperature Range -40 to 150 Degree C. Tags: Surface Mount, General Purpose LED Driver. More details for IS32FL3746B-QWLA3-TR can be seen below.