AL8807 Datasheet | Diodes Incorporated

NOT REMENDED FOR NEW DESIGN USE AL8860 OR AL8861 HIGH EFFICIENCY LOW 36V 1A BUCK LED DRIVER Description The AL8807 is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 9 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 6V to 36V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AL8807 switches at frequency up to 1MHz with controlled rise and fall times to reduce EMI. This allows the use of small size external ponents, hence minimizing the PCB area needed. Maximum output current of AL8807 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. Features - LED Driving Current up to 1.3A (MSOP-8EP) - Better Than 5% Accuracy - High Efficiency up to 96% - Optimally Controlled Switching Speeds - Operating Input Voltage from 6V to 36V - PWM/DC Input for Dimming Control - Built-In Output Open-Circuit Protection - SOT25, MSOP-8EP: Available in “Green” Molding pound (No Br, Sb) - Totally Lead-Free & Fully Ro HS pliant (Notes 1 & 2) - Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) SW CTRL SOT25 (Top View) SET GND GND CTRL MSOP-8EP Applications - MR16 Lamps - General Illumination Lamps - 12V Powered LED Lamps - 24V Powered LED Lamps VIN N/C SW...