AL8861QHIGH EFFICIENCY 40V 1.5AAUTOMOTIVE GRADE BUCK LED DRIVERDescriptionPin Assignments The AL8861Q is a hysteresis mode DC-DC step-down LED driver, (Top View) designed for driving single or multiple series of the connected LEDs efficiently from a voltage source higher than the LED voltage. The ISENSE18VIN device can operate with an input supply from 4.5V to 40V and provide an externally adjustable output current up to 1.5A for MSOP-8EP GND27N/C package. Depending upon supply voltage and external components, EPT this converter can provide up to 40W of output power. GND36LXCU The AL8861Q integrates the power switch and a high-side output VSET4D5LX current sensing circuit, which uses an external resistor to set the O R nominal average output current. MSOP-8EPP Dimming can be realized by applying an external control signal to the WE VSET pin. The VSET pin will accept either a DC voltage signal or a N PWM signal. Applications Automotive Interior LED Lamps The soft-start time can be adjusted by an external capacitor from the Automotive Exterior LED Lamps VSET pin to the ground. Applying a voltage of 0.2V or lower to the VSET pin can turn off the output and make the device enter into