AL1677-08BS-13

Issue Number │001 November 2015 New Product Announcement AL1677 AL1677 Universal High-Efficiency High-Accuracy LED Driver Converter The AL1677 is a universal AC input (85~277 VAC), highefficiency and high-accuracy buck LED driver converter. The topology provides accurate constant current (CC) line and load regulation, operating at boundary conduction mode (BCM) to assist EMI/EMC qualification and testing to meet the latest regulatory laws. AL1677 system replaces the auxiliary winding and external high-voltage MOSFET with a few external components to create a low bill of materials (BOM) cost solution. It has comprehensive protection features to improve the system safety and reliability. The thermal fold-back function reduces the output current when the driver’s temperature is higher than the setting value. The AL1677 is available in SO-8 package. The Diodes’ Advantage The AL1677 provides an extremely cost-effective solution for general illumination LED lamps  Single Inductance Extremely low BOM cost solution  Built-in UVLO, OTP, LED short, LED open Protection Provides a complete protection solution  Good Line Regulation and Load Regulation One solution can meet full load and universal input voltage application  Boundary Conduction Mode (BCM) Operation Achieves higher convert efficiency and reduced EMI issues with fewer components  Built-in Thermal Fold-back Function Improves the system’s reliability at the high ambient temperature Applications    Retrofit LED lamps High-voltage DC-DC LED driver General purpose constant current source www.diodes.com Issue Number │001 SNovember 2015 New Product Announcement AL1677 Typical Application: GU10/Bulb LED R1 R4 D1 C3 + OUT L1 F1 AC Input R2 DB1 C1 R3 NC D VCC D ROVP CS GND CS C2 U1 AL1677 R5 Diodes Off-line LED Drivers Part Number Max. Max. Operating Current High Output LED Efficiency Temp Triac Package Accuracy Power Topology Voltage Current Range Dimmable Outline Factor °C V mA % % AP1684A 80 400 +/-2 90 -40 ~ 105 Y N Buck SO-8 AP1685 80 200 +/-2 90 -40 ~ 105 Y N Buck SO-7 AL167808B/-10B/20B 80 120 /180 /240 +/-3 90 -40 ~ 105 N N Buck SO-7 AL1677-05B 80 100 +/-3 90 -40 ~ 105 N N Buck SO-8 AL1677-08B 80 120 +/-3 90 -40 ~ 105 N N Buck SO-8 AL1677-10B 80 180 +/-3 90 -40 ~ 105 N N Buck SO-8 AL1677-20B 80 240 +/-3 90 -40 ~ 105 N N Buck SO-8 Comments External MOS For >10W lamps Internal MOS for