AL1676-20BS7-13 Diodes Incorporated

NOT RECOMMENDED FOR NEW DESIGN NO ALTERNATIVE PART AL1676 UNIVERSAL HIGH POWER FACTOR BUCK LED DRIVER Description Pin Assignments The AL1676 is a universal AC input (85~277 V ), high power factor AC (PF) and high efficiency Buck LED driver. The AL1676 topology (Top View) provides accurate constant current (CC) with good line and load regulation, operating at boundary conduction mode (BCM) to ease in 7 VCC 1 D EMI/EMC qualification and testing to meet the latest regulatory laws. 2 ROVP The AL1676 single Buck stage driver works with a single winding 3 6 NC COMP inductor and High voltage MOSFET included, therefore, can use 5 CS fewer external components and create a low bill of material (BOM) GND 4 cost solution. The AL1676 has rich protection features to enhance system safety and reliability, including under voltage lock out (UVLO), SO-7 LED open/short, over voltage, over current, over temperature protection and thermal fold-back function which can reduce output current when the drivers temperature is higher than the setting value. The AL1676 is available for SO-7 package. Features >90% Efficiency Applications Universal 85 to 277 V Input Range AC Retrofit LED Lamps Multiple Options for Internal MOSFET LED Tube Tight Output Current Tolerance: 3% High Voltage DC-DC LED Driver Low Startup Current: 100A General Purpose Constant Current Source Low Operation Current: 170A (5KHs Switching) Single Winding Inductor Internal Protections: Under Voltage Lock Out (UVLO) Leading-Edge Blanking (LEB) Cycle-by-cycle Over Current Protection (OCP) Output Open/Short Protection (OVP/OSP) Thermal Fold-back Protection (TFP) Over Temperature Protection (OTP) SO-7 Package 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 AL1676 Typical Applications Circuit L1 C5 R4 OUT + R1 D1 L2 F1 AC R2 Input DB1 U1 AL1676 VR C1 C2 VCC D ROVP COMP NC GND CS C3 R3 C4 R5 Pin Descriptions Pin Number Pin Name Function 1 VCC Power supply voltage 2 ROVP Resistor set the open voltage 3 COMP Compensation for current control 4 GND Ground 5 CS Current sensing 6 NC No connection 7 D Drain of the internal high voltage MOSFET Functional Block Diagram 7 D 1 VCC OFF V Fault CC VCC STOP Management Clamp Management UVLO VDD V V OVP REF REF OSP OTP OVP OSP OVP tOFF 2 t Detection OFF OVP ROVP (ZCD ) t OFF VOVP REF VCC Driver Supply S Clamp R Q 3 6 COMP NC + STOP - 0.8V OCP - + V REF + 4 5 Gm Sample and GND - CS Hold 2 of 15 February 2021 AL1676 Diodes Incorporated www.diodes.com Document number: DS38290 Rev. 2 - 3