AL5809

Document number: DS36625 Rev. 3 - 2

1 of 13

www.diodes.com

October 2014

© Diodes Incorporated

AL5809

60V Two Terminal Constant Current LED Driver

Description

The AL5809 is a constant current linear LED driver and provides a

cost-effective two pin solution.

It has an excellent temperature

stability of 20 ppm/°C and current accuracy ±5% regulated over a

wide voltage and temperature range. The AL5809 comes in various

fixed output current versions removing the need for external current

setting resistors creating a simple solution for the linear driving of

LEDs. It supports both the high-side and low-side driving of LED

chains.

The AL5809 turns on immediately and can swing from 2.5V up to

60V enabling drive long LED chains. The floating ground, 60V

voltage rating between input and output pins designed to withstand

the high peak voltage incurred in offline applications.

The AL5809 is available in thermally robust package POWERDI-123

or SOD-123 package.

Features



Robust power package up to 1.2W

for POWERDI-123



-40°C to +125°C temperature range



±5% LED current tolerance over temperature



(15mA, 20mA, 30mA, 40mA, 50mA, 60mA, 90mA, 120mA, and

150mA) available in POWERDI-123 package



(15mA, 20mA, 30mA, 40mA and 50mA) available in SOD-123

package, and other current 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.



Available in PowerDi-123 and SOD-123 in

“Green” Molding

Compound (No Br, Sb) (Note 1) with Lead-Free Finish/RoHS

Compliant (Notes 2 & 3)

Pin Assignments

IN

OUT

1

2

AL5809

Applications



Offline LED Lamps



LED Power Supplies



White Goods



LED Signs



Instrumentation Illumination

Notes:

1. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

2. No purposely added lead. Fully compliant EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2).

3. See http://www.diodes.com

for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.

Typical Applications Circuit

VIN

Low Side LED String

IN

OUT

1

2

AL5809

VIN

High Side LED String

IN

OUT

1

2

AL5809