AL1783 60V THREE INDEPENDENT PWM CHANNEL LINEAR LED DRIVER Description Pin Assignments The AL1783 is a three-channel linear LED driver with independent Top View PWM dimming and current-setting controls for each channel. The device is designed to target connected, commercial, industrial, and VIN 1 16 REF1 RGB LED lighting applications. 2 REF2 NC 15 The key merits of the AL1783 are attributed to a compact solution, PWM1 3 14 REF3 eBOM cost effectiveness, excellent PWM dimming performance, low 4 standby power, ease of system implementation, and up to 60V input PWM2 13 FAULTB EP and LED pin operating voltage. PWM3 5 12 NC GND 6 11 LED1 The AL1783 is available in the TSSOP-16EP (Type DX) package to minimize PCB space and external component count. 7 10 GND LED2 GND 8 9 LED3 (TSSOP-16EP (Type DX)) Features Applications Wide Input Voltage Range from 6.5V to 60V RGB Lighting -40C to +105C Ambient Temperature Operation Range Horticulture Lighting 4% LED Current Tolerance 125mA Architecture Lighting PWM Dimming Control for Each Channel Industrial Lighting LED Current Adjustable for Each Channel by External Ref pins Commercial Lighting, i.e. Ceiling and Panel Light Automatic Enter and Exit Standby Power Mode Connected Lighting Fast PWM Dimming Capable to eliminate e-Flicker Robust Protections: Under Voltage Lock-out (UVLO), Over Voltage Protection (OVP), LED String Open/Short Protection (LED Short/Open) Over Temperature Protection (OTP): Thermal Fold-back, Thermal Shut-down, and Automatic Thermal Recovery Fault Reporting: UVLO, OTP, LED Open and Short 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-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. AL1783 Typical Application Circuit V up to 60V IN C IN R B G VIN 3.3V AL1783 R B G LED1 R FAULTB LED2 LED3 FAULTB PWM1 REF1 MCU PWM2 REF2 PWM3 REF3 R R R REF3 REF2 REF1 GND Figure 1. Typical Application Pin Descriptions Pin Number Pin Name Function VIN 1 Power Supply for Chip NC 2 No Connection st PWM1 3 PWM Dimming Signal and Enable Input for 1 channel of LED1, Internally Pulled Down 200K typical. nd PWM2 4 PWM Dimming Signal and Enable Input for 2 channel of LED2, Internally Pulled Down 200K typical. rd PWM3 5 PWM Dimming Signal and Enable Input for 3 channel of LED3, Internally Pulled Down 200K typical. GND 6 Ground GND 7 Ground GND 8 Ground rd LED3 9 3 Channel for LED String Cathode nd LED2 10 2 Channel for LED String Cathode st LED1 11 1 Channel for LED String Cathode NC 12 No Connection FAULTB 13 Fault Report. Open Drain Asserted Low to report faulty conditions. Needs an external pull-up resistor. REF3 14 Reference Current Setting through External Resistor (R ) ref3 REF2 15 Reference Current Setting through External Resistor (R ) ref2 REF1 16 Reference Current Setting through External Resistor (R ) ref1 Exposed pad must connect to GND. It should be externally connected to GND to reduce thermal Exposed PAD impedance. It should not be used as an electrical conduction path. 2 of 14 November 2020 AL1783 Diodes Incorporated www.diodes.com Document number: DS43199 Rev. 2 - 2