AL16937 BUCK DIMMABLE LED DRIVER Description Pin Assignments The AL16937 is a high performance, high power factor, high (Top View) efficiency, and high current precision buck dimmable LED driver for triac dimmable LED lamp applications. The AL16937 topology provides an accurate output current over wide line and load 7 1 VCC D regulation. The wide switching frequency operates at boundary conduction mode (BCM) to ease EMI/EMC design and testing, to meet the latest regulatory standards. RT 2 The AL16937 LED driver integrates 400V/3A MOSFET, which is 3 6 CS COMP suitable for 120V applications. The AL16937 has the built-in AC thermal fold-back protection trigger point to automatically reduce 4 5 NC GND output current. Other protection features enhance LED lighting system s safety and reliability. SO-7 The AL16937 dimming curve is compliant with the NEMA SSL6 standard. The AL16937 applies to a wide range of dimmers, including leading edge and trailing edge dimmer, to achieve deep dimming Applications down to 1%. Mains Dimmable LED Lamps The AL16937 is available in SO-7 package. Offline LED Power Supply Driver Features Tight Current Sense Tolerance : 3% Low Startup Current: 100A Typical Low Operation Current: 210A (Switching Frequency at 4kHz) Single Winding Inductor Wide Range of Dimmer Compatibility Integration of 400V/3A MOSFET NEMA SSL6 Dimming Curve Compliant Internal Protections Under Voltage Lockout (UVLO) Leading-Edge Blanking (LEB) Cycle-By-Cycle Over Current Protection (OCP) Output Short Protection (OSP) Thermal Foldback 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) & 2015/863/EU (RoHS 3) compliant. 2. See AL16937 Typical Application Circuits L1 FR1 AC Input LEDS D1 R7 C5 DB1 R2 R1 R3 C3 C2 C1 VCC D 1 7 L2 RT 2 COMP CS 6 3 GND NC C4 R6 R5 4 5 C6 AL16937 Buck Application Circuit Pin Descriptions Pin Number Pin Name Function 1 VCC Power supply voltage 2 RT Resistor set the systems maximum t ON 3 COMP Compensation for current control 4 GND Ground 5 NC Not connected 6 CS Current sensing 7 D Drain of the internal high voltage MOSFET 2 of 15 AL16937 April 2018 Diodes Incorporated www.diodes.com Document number: DS39631 Rev. 2 - 2 NNEEWW PPRROODDUUCCTT U1 AL16937 +