AL5892 OFFLINE DIMMABLE LINEAR LED DRIVER Description Pin Assignments The AL5892 is an offline TRIAC dimmable linear LED driver with high integration of constant current control and smart bleeder operation. With (Top View) the built-in 350V main power MOSFET and 500V bleeder MOSFET, the AL5892 offers users to design a TRIAC dimmable LED driver with extremely few external components and minimized system BOM cost. VBUS 8 DIMD 1 Because of the linear operation of the IC, the AL5892 LED driver is compliant with EMI standards without adding any EMI components. The GND 2 COMP 7 AL5892 is optimized to work at 120VAC input mains voltage. EP BLD 3 CS 6 With an innovative efficiency compensation method, the AL5892 operates up to 85% efficiency with driving a single high-voltage LED PLED 4 5 VCC chain. The AL5892 detects TRIAC dimmer and controls the smart bleeder to SO-8EP (Type TH) turn on and off, thus it offers the LED driver good dimmer compatibility with both leading edge and trailing edge dimmers. The AL5892 also converts the dimmer signal to optimize the dimming curve to be Applications compliant with NEMA SSL7. LED Lamps Retro Fit TRIAC Dimming The AL5892 has abundant of protection features, such as LED short LED Power Modules protection (OSP), thermal foldback protection (TFP) and over temperature shutdown protection (OTP). The AL5892 is available in SO-8EP (Type TH) package to enhance the thermal reliability of the LED driver. Features Integrated 350V Main MOSFET and 500V Bleeder MOSFET Low Operation Current: 300A Tight Current Sense Tolerance: 3% Output Current Programmable up to 75mA Wide Range of Dimmer Compatibility Dimming Curve Compliant to NEMA SSL7 Internal Protections LED Open/Short Protection (OSP) Thermal Foldback Protection (TFP) Over Temperature Shutdown Protection (OTP) Power Factor >0.7 Efficiency up to 85% SO-8EP (Type TH) 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, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. AL5892 Pin Descriptions Pin Number Pin Name Function 1 VBUS Rectified mains voltage sensing 2 GND Ground of the IC 3 BLD Drain of the internal Bleeder MOSFET 4 PLED Connect with LED string negative terminal 5 VCC Power supply for IC. Provides power for the internal control circuitry and gate driver 6 CS Current sense pin. Connect a resistor from this pin to GND to set LED current 7 COMP LED current Loop compensation capacitor input Dimmer detection signal Output. Connect with a capacitor to filter the output of the dimmer 8 DIMD detection circuit 9 EP Connect to GND Typical Applications Circuit Figure 1 shows the typical application of AL5892 along with basic external circuitry. Since this application example is designed to assess dimmers relative on-time, the AL5892 can control the LED current accordingly. The AL5892 allows most phase-control dimmers, both forward and reverse phase, to be used. D1 C4 + RF1 R1 AC R4 R3 Input DB1 U1 AL5892 C3 8 1 DIMD VBUS 2 7 GND COMP EP C2 3 6 BLD CS R2 5 4 PLED VCC R5 C1 Figure 1. AL5892 Typical Application 2 of 11 AL5892 October 2019 Diodes Incorporated www.diodes.com Document number: DS42212 Rev. 1 - 2 NEW PRODUCT