AL8806 Datasheet | Diodes Incorporated

Description The AL8806 is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 8 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 6V to 36V. The AL8806 switches at frequencies up to 1MHz. This allows the use of small size external ponents, hence minimizing the PCB area needed. Maximum output current of AL8806 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.4V or lower at CTRL switches off the output MOSFET simplifying PWM dimming. Pin Assignments SET 1 GND 2 GND 3 CTRL 4 8 VIN 7 6 N/C SW 5 SW MSOP-8EP Features - LED driving current up to 1.5A - Better than 5% accuracy - High efficiency up to 98% - Operating input voltage from 6V to 36V - High switching frequency up to 1MHz - PWM/DC input for dimming control - Built-in output open-circuit protection - MSOP-8EP: Available in “Green” Molding pound (No Br, Sb) with lead Free Finish/ Ro HS pliant - Totally Lead-Free & Fully Ro HS pliant (Notes 1 & 2) - Halogen and Antimony Free. “Green” Device (Note 3) Applications - High Power MR16 Lamps - General Illumination Lamps - Multi-Die LED Driver Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (Ro HS) & 2011/65/EU (Ro HS 2) pliant. 2. See http://.diodes./quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony pounds. Typical Applications...