AL5811
60V, LINEAR 75mA ADJUSTABLE CURRENT LED DRIVER
Description Pin Assignments
The AL5811 is a Linear LED driver with an adjustable LED current up
(Top View)
to 75mA offering excellent temperature stability and output handling
capability. The AL5811 simplifies the design of linear and isolated or
V 1 8 LED
CC
non-isolated LED drivers by setting the LED current with standard
2 7 NC
NC
value resistors.
The AL5811 has an open drain output that can swing from 1V up to 3 6 NC
NC
60V enabling it drive long LED chains. Its low 0.5V RSET pin is
4 5
R GND
SET
outside of the LED current path and so accuracy is maintained while
minimizing the required overhead to regulate the LED current. This
MSOP-8EP
reduces its power dissipation when compared to traditional linear
LED drivers. This makes it ideal for driving LEDs up to 75mA.
(Top View)
Longer LED chains can be driven by tapping VCC from the chain,
where the chain voltage may exceed 60V.
V LED
1 6
CC
The AL5811 is available in the exposed pad MSOP-8EP and
U-DFN3030-6 packages.
NC 2 5 NC
Exposed
Pad
R GND
3 4
SET
U-DFN3030-6
Applications
Features
Isolated Offline LED Converters
Low Reference Voltage (V = 0.5V)
RSET
Linear LED Driver
-40C to +125C Temperature Range
LED Signs
6% Typical LED Current Tolerance
Instrumentation Illumination
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)
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See
AL5811
Pin Descriptions
Pin Number
Pin Name Function
MSOP-8EP U-DFN3030-6
Supply Input.
V 1 1
CC
Connect a 0.1F ceramic capacitor between V and GND as close as possible to the device.
CC
LED Current Setting Pin.
Connect a resistor from this pin to GND:
4 3
R
SET
I = 750/R
LED SET
May also be used to provide PWM dimming functionality
GND 5 4 Ground Reference Point of Device.
LED 8 6 LED Current Sink Connection.
NC 2, 3, 6, 7 2, 5 Unused
Exposed Pad (bottom).
EP Exposed Pad Exposed Pad Used to improve thermal impedance of package.
It must be connected to GND directly underneath the package.
Functional Block Diagram
V
CC
LED
Current
+
Regulator
-
R
SET
GND
Absolute Maximum Ratings (@T = +25C, unless otherwise specified.)
A
Symbol Parameters Ratings Unit
V Supply Voltage Relative to GND Pin (Note 4) -0.3 to +66 V
CC
V LED Voltage Relative to GND Pin (Note 4) -0.3 to +66 V
LED
V R Voltage Relative to GND Pin -0.3 to +6 V
RSET SET
I LED Pin Current Sink Current Range 85 mA
LED
ESD HBM ESD Protection - Human Body Model 1 kV
ESD CDM ESD Protection - Charged Device Model 1.2 kV
T Operating Junction Temperature -40 to +150 C
J
Storage Temperature -55 to +150 C
TST
Notes: 4. V pin can be greater or smaller than V ; neither should go below GND.
CC LED
Caution: 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
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AL5811 November 2016
Diodes Incorporated
www.diodes.com
Document number: DS35255 Rev. 3 - 2