AL1678-08BS7-13

PART OBSOLETE – NO ALTERNATE PART AL1678-20B/10B/08B UNIVERSAL, 500V BUCK LED DRIVER OBSOLETE – PART DISCONTINUED Description Pin Assignments The AL1678-20B/10B/08B is a universal AC input (85 to 277 VAC), high efficiency and high accuracy Buck LED driver. The AL167820B/10B/08B topology provides accurate constant current over line and load regulation with tight tolerance ±3%, operating at boundary conduction mode (BCM) to ease in EMI/EMC qualification and testing to meet the latest regulatory laws. (Top View) The AL1678-20B/10B/08B single buck stage system works with a single winding inductor and high voltage MOSFET included, therefore, can use fewer external components and create a low bill of material (BOM) cost solution. The AL1678-20B/10B/08B has rich protection features to enhance the system safety and reliability. It has thermal fold back function, which can reduce the output current when the driver’s temperature is higher than the setting value. 7 Drain 3 6 LC 4 5 CS OUT 1 VCC 2 ROVP GND SO-7 The AL1678-20B/10B/08B is available in SO-7 package. Applications Features • • • • • • • • • • • • • > 90% Efficiency Valley Switching to Achieve Low Switching Loss Universal 85 to 277 VAC Input Range Internal MOSFET up to 500V Tight Current Sense Tolerance: ±3% Low Start-Up Current: 170µA Low Operation Current: 100µA (Static) Single Winding Inductor Internal Protections  Under Voltage Lock Out (UVLO)  Leading-Edge Blanking (LEB)  Output Open/Short Protection  Open-Load and Reload Detection  Thermal Fold-Back Function  Over Temperature Protection (OTP) SO-7 Package Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/ Notes: • • • Retrofit LED Lamps High Voltage DC-DC LED Driver General Purpose Constant Current Source 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/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 defined as those which contain