Diodes AL5801 Manuel d'utilisateur

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AL5801
Document number: DS35555 Rev. 3 - 2
1 of 11
www.diodes.com
July 2012
© Diodes Incorporated
A
L5801
100V, ADJUSTABLE CURRENT SINK LINEAR LED DRIVER
Description
The AL5801 combines a 100V N-channel MOSFET with a pre-
biased NPN transistor to make a simple, small footprint LED driver.
The LED current is set by an external resistor connected from R
EXT
pin (4) to GND pin (6). The internal pre-biased transistor develops
approximately 0.56V across the external resistor.
The AL5801 open-drain output can operate from 1.1V to 100V
enabling it to operate 5V to 100V power supplies without additional
components.
PWM dimming of the LED current can be achieved by driving the
BIAS pin (1) with an external, open-collector NPN transistor or
open-drain N-channel MOSFET.
The AL5801 is available in a SOT26 package and is ideal for driving
LED currents up to 350mA.
Features
Feedback Pin Reference Voltage V
RSET
= 0.56V at +25°C
-40°C to +125°C Temperature Range
1.1V to 100V Open-Drain Output
Negative temperature V
RSET
co-efficient automatically reduces
the LED current at high temperatures
Low thermal impedance SOT26 package with copper lead
frame
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Qualified to AEC-Q101 Standards for High Reliability
Pin Assignments
(Top View)
SOT26
Applications
Linear LED Drivers
LED Signs
Offline LED Luminaries
Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
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
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Résumé du contenu

Page 1 - © Diodes Incorporated

AL5801 Document number: DS35555 Rev. 3 - 2 1 of 11 www.diodes.com July 2012© Diodes Incorporated AL5801100V, ADJUSTABLE CURRENT SINK LINEAR LED DRI

Page 2

AL5801 Document number: DS35555 Rev. 3 - 2 10 of 11 www.diodes.com July 2012© Diodes Incorporated AL5801 Ordering Information Part Number Qualifi

Page 3

AL5801 Document number: DS35555 Rev. 3 - 2 11 of 11 www.diodes.com July 2012© Diodes Incorporated AL5801 IMPORTANT NOTICE DIODES INCORPORATED MAK

Page 4

AL5801 Document number: DS35555 Rev. 3 - 2 2 of 11 www.diodes.com July 2012© Diodes Incorporated AL5801 Pin Descriptions Pin Number Pin Name Funct

Page 5

AL5801 Document number: DS35555 Rev. 3 - 2 3 of 11 www.diodes.com July 2012© Diodes Incorporated AL5801 Package Thermal Data Characteristic Symbol

Page 6

AL5801 Document number: DS35555 Rev. 3 - 2 4 of 11 www.diodes.com July 2012© Diodes Incorporated AL5801 Pre-Bias Transistor Electrical Characteris

Page 7

AL5801 Document number: DS35555 Rev. 3 - 2 5 of 11 www.diodes.com July 2012© Diodes Incorporated AL5801 Typical Performance Characteristics 0.050.

Page 8

AL5801 Document number: DS35555 Rev. 3 - 2 6 of 11 www.diodes.com July 2012© Diodes Incorporated AL5801 Typical Performance Characteristics (cont.)

Page 9 - PWM Dimming

AL5801 Document number: DS35555 Rev. 3 - 2 7 of 11 www.diodes.com July 2012© Diodes Incorporated AL5801 Application Information Figure 13 Typical

Page 10

AL5801 Document number: DS35555 Rev. 3 - 2 8 of 11 www.diodes.com July 2012© Diodes Incorporated AL5801Constant LED Current Temperture Compensation

Page 11

AL5801 Document number: DS35555 Rev. 3 - 2 9 of 11 www.diodes.com July 2012© Diodes Incorporated AL5801 PWM Dimming (a) (b) Figure 16 Applicat

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