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PDF AL5802 Data sheet ( Hoja de datos )
| Número de pieza | AL5802 | |
| Descripción | ADJUSTABLE CURRENT SINK LINEAR LED DRIVER | |
| Fabricantes | Diodes | |
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AL5802
30V, ADJUSTABLE CURRENT SINK LINEAR LED DRIVER
Description
The AL5802 combines a high gain NPN transistor with a pre-
biased NPN transistor to make a simple small footprint LED
driver.
The LED current is set by an external resistor connected to
from REXT pin (6) to GND pin (4), the internal high gain
transistor develops approximately 0.6V across the external
resistor.
The AL5802 open-collector output can operate from 0.8V to
30V enabling it to operate from 5V to 24V power supplies
without additional components.
PWM dimming of the LED current can be achieved by either
driving the BIAS pin (2) with a low impedance voltage
source, or driving the EN pin (3) with an external open-
collector NPN transistor or open-drain N-channel MOSFET.
The AL5802 is available in a SOT26 package and is ideal for
driving 20mA to 120mA LED currents.
Pin Assignments
(Top View)
654
Q1
Q2
123
SOT26
Features
• Reference voltage VRSET = 0.65V
• -40 to 125ºC temperature range
• 0.8V to 30V open-collector output
• Negative temperature co-efficient – automatically reduce the LED
current at high temperatures
• Low thermal impedance SOT26 with copper leadframe
• SOT26: Available in “Green” Molding Compound (No Br, Sb)
• Qualified to AEC-Q101 Standards for High Reliability
Applications
• Linear LED driver
• LED signs
• Offline LED luminaries
Typical Application Circuit
AL5802
Document number: DS35516 Rev.4 - 2
1 of 11
www.diodes.com
November 2011
© Diodes Incorporated
1 page  
AL5802
30V, ADJUSTABLE CURRENT SINK LINEAR LED DRIVER
Typical Performance Characteristics
Fig. 5 Output Current vs. Vout
Fig. 6 Output Current vs. REXT
Fig. 7 Output Current vs. Vout
Fig. 8 Output Current vs. Vout
Fig. 9 Output Current vs. Vout
Fig. 10 Output Current vs. Vbias
Notes 7.Vout in the “Output current Vs Vout“ graphs limited by power dissipation in the device
AL5802
Document number: DS35516 Rev.4 - 2
5 of 11
www.diodes.com
November 2011
© Diodes Incorporated
5 Page 
AL5802
30V, ADJUSTABLE CURRENT SINK LINEAR LED DRIVER
Suggested Pad Layout
C2 C2
G
Z
Y
X
C1
Dimensions
Z
G
X
Y
C1
C2
Value (in mm)
3.20
1.60
0.55
0.80
2.40
0.95
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall
assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes
Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales
channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify
and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of,
directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and
markings noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the
express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause
the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems,
and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-
related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and
its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or
systems.
Copyright © 2011, Diodes Incorporated
www.diodes.com
AL5802
Document number: DS35516 Rev.4 - 2
11 of 11
www.diodes.com
November 2011
© Diodes Incorporated
11 Page | ||
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| PDF Descargar | [ Datasheet AL5802.PDF ] | |
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