AL1697-20CS7-13 Diodes Incorporated

AL1697 High PF, Offline Dimmable LED Driver with Internal High-Voltage MOSFET Description Pin Assignments The AL1697 is a high performance, high power factor, high efficiency and high precision buck-boost LED driver for mains dimmable LED lamp applications. The AL1697 topology provides an accurate output (Top View) current over wide line and load regulation. The wide switching frequency operates at boundary conduction mode (BCM) to ease 1 7 VCC D EMI/EMC design, and testing to meet the latest regulatory standards. RT 2 The AL1697 with built in MOSFET solution reduces the bill of material COMP 3 6 CS (BOM) cost by eliminating the need of auxiliary winding and an external high voltage MOSFET. The AL1697 has extensive protection 4 5 FB GND features to enhance system safety and reliability. The AL1697 starts reducing output current when the drivers temperature is higher than the built-in thermal foldback protection trigger point. SO-7 The AL1697 applies to a wide range of dimmers including leading edge and trailing edge dimmer. Some can achieve deep dimming Applications down to 1%. The AL1697 dimming curve is compliant with the NEMA Mains Dimmable LED Lamps SSL6 standard. Offline LED Power Supply Driver The AL1697 is available in SO-7 package, which provides an extra pin spacing between the high voltage MOSFETs drain and low voltage pins to increase electricity isolation. Features Three Internal High-Voltage MOSFET Options: R 2.8(3A /400V), 4(2A/600V) and 1.8(4A /670V) DS(ON) for Super-Junction Tight Current Sense Tolerance : 3% Low Startup Current: 130A Low Operation Current: 170A (Switching Frequency at 4kHz) Single Winding Inductor Wide Range of Dimmer Compatibility NEMA SSL6 Dimming Curve Compliant Internal Protections Under Voltage Lockout (UVLO) Leading-Edge Blanking (LEB) Cycle-by-cycle Over Current Protection (OCP) Output Open/Short Protection (OVP/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) compliant. 2. See AL1697 Typical Applications Circuit L1 R2 FR1 R3 AC VCC D Input 1 7 DB1 RT R1 2 COMP CS 6 3 C2 GND C3 C4 FB C1 R6 4 5 C6 R5 D1 R4 R9 C5 LEDS R7 L2 D2 + R8 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 FB Feedback for LED open protection voltage 6 CS Current sensing 7 D Drain of the internal high voltage MOSFET Functional Block Diagram D 7 1 VCC OFF STOP Fault V CC VCC Clamp UVLO Management Management OTP OVP V V DD REF t Detection ONS 2 (ZCD) RT Set t max ON VCC t max ON Driver Supply Clamp S R Q 3 6 COMP - Sample and Hold CS - Gm + t max ON + VREF ST OP OCP + - 1V V REF OVP 4 OVP 5 GND OVP FB 2 of 13 AL1697 July 2016 Diodes Incorporated www.diodes.com Document number: DS38223 Rev. 4 - 2 U1 AL1697