AL8808WT-7

AL8808 COST EFFECTIVE LOW EMI 30V 1A BUCK LED DRIVER Description Pin Assignments The AL8808 is a step-down DC/DC converter designed to drive LEDs (Top View) with a constant current. The device can drive up to 8 LEDs, depending on the forward voltage of the LEDs, in series from a SW 1 voltage source of 6V to 30V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating GND 2 NEW PRODUCT the need for ballast resistors. The AL8808 switches at frequency up to 1MHz with controlled rise and fall times to reduce EMI. This allows area needed. TSOT25 Maximum output current of AL8808 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either an analog DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.4V or lower at CTRL switches Applications • MR16 Lamps • General Illumination Lamps Features • LED Driving Current Up to 1A • Better Than 5% Accuracy • High Efficiency Up to 96% • Fast Controlled Falling Edges 7ns • Operating Input Voltage from 6V to 30V • High Switching Frequency Up to 1MHz • PWM/DC Input for Dimming Control • Built-In Output Open-Circuit Protection • Built-In Over-Temperature Protection • Notes: 4 SET CTRL 3 the use of small size external components, hence minimizing the PCB off the output MOSFET simplifying PWM dimming. 5 VIN TSOT25: Available in “Green” Molding Compound (No Br, Sb) ƒ Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) ƒ Halogen and Antimony Free. “Green” Device (Note 3) 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com 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