AL8821SP-13 Diodes Incorporated

AL8821 50V, 2A BOOST LED DRIVER Description Pin Assignments The AL8821 is a boost converter that delivers an accurate constant current for MR16 and similar LED Lamps. With proprietary control (Top View) scheme, the LED driver is compatible with many commonly used electronic transformers and provides designs with High Power Factor (PF) and low Total Harmonic Distortion (THD) for these applications. SW 1 8 NC The operation frequency is up to 1MHz that allows the use of small size inductor. With the package of SO-8EP, the AL8821 has small CS 2 7 VCC thermal resistance and can be used for wide range of output power. EP The driver can be used for dimmable MR16 application and can be FB 3 VIN 6 compatible with leading-edge dimmer and trailing-edge dimmer. COMP 5 NC 4 Features Wide Input Voltage Range: 5V to 36V SO-8EP Internal 50V NDMOS Switches Continuous Conduction Mode (CCM) Operation Applications Up to 1MHz Switching Frequency High PF > 0.9 and Low THD < 30% and Low Ripple < 20% Non-dimmable MR16 Lamps Compatible With Leading-edge Dimmer And Trailing-edge Dimmable MR16 Lamps Dimmer General Illumination Lamps Internal Protections Under Voltage Lock Out (UVLO) Output Open Over Temperature Protection (OTP) Pb-free SO-8EP Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AL8821 Pin Descriptions Pin Number Pin Name Function 1 SW Integrated MOS Drain 2 CS Input Current Sense Pin 3 FB LED Output Current Feedback Pin 4 COMP Control Loop Compensation Pin 5 NC Not Connected 6 VIN IC Input Voltage, Adding from Boost Output Voltage 7 VCC Supply Voltage For Internal Circuit 8 NC Not Connected 9 Exposed Pad Connected to Ground Functional Block Diagram VIN VCC 6 7 V CC Internal V REF Regulator V Chip EN BG UVLO V BG Bandgap V IN PWM1 9 V FB OVP Exposed OVP LOGIC Pad 2 OTP CS V CS1 1 CS1 SW V CC Driver COMPARATOR 3 FB PWM1 EA V BG 4 COMP 2 of 14 February 2017 AL8821 Diodes Incorporated www.diodes.com Document number: DS37671 Rev. 2 - 2 NEW PRODUCT I HYS I HYS OTP