Diodes Incorporated
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60V Two Terminal Constant Current LED Driver PowerDI

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The AL5809 is a constant current linear LED driver and it provides a cost-effective two pin solution. It offers an excellent temperature stability 20 ppm/°C and the current accuracy ±3% regulated over a wide voltage range. The AL5809 simplifies the design for linear LED drivers allowing it to be designed as a high or low-side constant current regulator without any external components.

The AL5809 turns on immediately and can swing from 2.5V up to 60V floating voltage enabling it drive long LED chains. 60V Voltage rating between Input and Output pins designed to withstand the high peak voltage incurred in offline applications.


  • Robust Power Package up to 2.3W for POWERDI-123
  • -40°C to +125°C Temperature Range
  • ±3% LED Current Tolerance
  • 15mA, 20mA, 30mA, 40mA, 50mA, 60mA, 90mA, 120mA, and 150mA constant current options and other options available by request.
  • Constant current with Low Temperature Drift and High Power Supply Rejection ratio
  • 2.5V to 60V Operating Voltage between two terminals


  • Offline LED Lamps
  • LED Power Supplies
  • White Goods
  • LED Signs
  • Instrumentation Illumination

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Topology Linear LED Driver
Minimum Supply Voltage (V) 2.5 V
Maximum Supply Voltage (V) 60 V
Maximum VOUT (V) 60 V
Number of Channels 1
LED Current Sense Voltage (mV) N/A mV
Output Current (mA) Fixed mA
Channel Max. Output Current (mA) 10 to 150 mA
Accuracy (%) 5 %
Dimming Ext PWM
Temperature Range (°C) -40 to 125 °C

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site