Diodes Semiconductor Electronic Components Datasheet

AL5811 Datasheet

LINEAR 75mA ADJUSTABLE CURRENT LED DRIVER

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AL5811

60V, LINEAR 75mA ADJUSTABLE CURRENT LED DRIVER

Description

The AL5811 is a Linear LED driver with an adjustable LED current up

to 75mA offering excellent temperature stability and output handling

capability. The AL5811 simplifies the design of linear and isolated or

non-isolated LED drivers by setting the LED current with standard

value resistors.

The AL5811 has an open drain output that can swing from 1V up to

60V enabling it drive long LED chains. Its low 0.5V RSET pin is

outside of the LED current path and so accuracy is maintained while

minimizing the required overhead to regulate the LED current. This

reduces its power dissipation when compared to traditional linear

LED drivers. This makes it ideal for driving LEDs up to 75mA.

Longer LED chains can be driven by tapping VCC from the chain,

where the chain voltage may exceed 60V.

The AL5811 is available in the exposed pad MSOP-8EP and

U-DFN3030-6 packages.

Pin Assignments

VCC 1

NC 2

NC 3

RSET 4

(Top View)

MSOP-8EP

(Top View)

8 LED

7 NC

6 NC

5 GND

VCC 1

NC 2

RSET 3

Exposed

Pad

6 LED

5 NC

4 GND

U-DFN3030-6

Features

 Low Reference Voltage (VRSET = 0.5V)

 -40°C to +125°C Temperature Range

 ±6% Typical LED Current Tolerance

 Low Temperature Drift

 1.0V to 60V Open-Drain Output

 High Power Supply Rejection

 MSOP-8EP and U-DFN3030-6

 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

 Halogen and Antimony Free. “Green” Device (Note 3)

Applications

 Isolated Offline LED Converters

 Linear LED Driver

 LED Signs

 Instrumentation Illumination

Notes:

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

2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen and Antimony free, "Green" and Lead-Free.

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

and <1000ppm antimony compounds.

Typical Applications Circuit

AL5811

Document number: DS35255 Rev. 2 - 2

1 of 13

www.diodes.com

March 2014

Diodes Semiconductor Electronic Components Datasheet

AL5811 Datasheet

LINEAR 75mA ADJUSTABLE CURRENT LED DRIVER

No Preview Available !

AL5811

Pin Descriptions

Name

VCC

RSET

GND

LED

Pin Number

MSOP-8EP U-DFN3030-6

2, 3, 6, 7

2, 5

Exposed Pad Exposed Pad

Function

Supply Input.

Connect a 0.1μF ceramic capacitor between VCC and GND as close as possible to the device.

LED Current Setting Pin.

Connect a resistor from this pin to GND:

ILED = 750/RSET

May also be used to provide PWM dimming functionality

Ground Reference Point of Device.

LED Current Sink Connection.

Unused

Exposed Pad (bottom).

Used to improve thermal impedance of package.

It must be connected to GND directly underneath the package.

Functional Block Diagram

Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.)

Symbol

VCC

VLED

VRSET

ILED

ESD HBM

ESD CDM

TST

Parameters

Supply Voltage Relative to GND Pin (Note 4)

LED Voltage Relative to GND Pin (Note 4)

RSET Voltage Relative to GND Pin

LED Pin Current Sink Current Range

Human Body Model ESD Protection

Charged Device Model ESD protection

Operating Junction Temperature

Storage Temperature

Ratings

-0.3 to +66

-0.3 to +6

1.2

-40 to +150

-55 to +150

Unit

°C

Notes:

Caution:

4. VCC pin can be greater or smaller than VLED; neither should go below GND.

Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;

functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be

affected by exposure to absolute maximum rating conditions for extended periods of time.

Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when

handling and transporting these devices

AL5811

Document number: DS35255 Rev. 2 - 2

2 of 13

www.diodes.com

March 2014

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AL5811 Datasheet

LINEAR 75mA ADJUSTABLE CURRENT LED DRIVER

AL5811 Datasheet

LINEAR 75mA ADJUSTABLE CURRENT LED DRIVER

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