AL8863 Datasheet | Diodes Incorporated

Description The AL8863 is a step-down DC/DC controller designed to drive LEDs with high output current. The device operates at an input supply voltage from 4.5V to 60V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The switching frequency range of AL8863 is from 50k Hz to 1MHz. The wide operating frequency range allows more flexibility on ponent selection, and also with operating up to 1MHz, it allows the use of smaller size external ponents, hence minimizing the PCB size and driver board. The output current of AL8863 is set via an external resistor connected between the VIN and CSN input pins. Dimming is achieved by applying a PWM signal at the DIM input pin. The soft-start time can be adjusted using an external capacitor from the DIM pin to ground. The AL8863 is available in the thermally enhanced SO-8EP package. Pin Assignments (Top View) OSP 1 DIM 2 NTC 3 GND 4 8 CSN 7 FAULT 6 VIN 5 DRV SO-8EP Applications - mercial & Industrial Lighting - Architecture Lighting - External LED Drivers and Smart Lighting Features - Wide Input Voltage Range: 4.5V to 60V - Operating Frequency Range: 50k Hz to 1MHz - 1000:1 PWM Dimming Resolution at 100Hz - Single Pin for On/Off and Brightness Control by PWM Signal - Fault Status Indication for Abnormal Operation - LED Shorted Protection - Inherent Open-Circuit LED Protection - Programmable Thermal Fold-Back Operation Through NTC Pin - Over Temperature Shutdown - Thermally Enhanced SO-8EP Package - Totally Lead-Free & Fully Ro HS pliant (Notes 1 & 2) - Halogen and Antimony Free. “Green” Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (Ro HS), 2011/65/EU (Ro HS 2) & 2015/863/EU (Ro HS 3) pliant. 2. See https://.diodes./quality/lead-free/ 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...