al8400 Diodes, Inc., al8400 Datasheet
al8400
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al8400 Summary of contents
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... Description The AL8400 is a 5-terminal adjustable Linear LED driver- controller offering excellent temperature stability and output handling capability. The AL8400 simplifies the design of linear and isolated LED drivers. With its low 200mV current sense 2V FB pin, it controls the regulation of LED current with minimal power dissipation when compared to traditional linear LED drivers ...
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... Document number: DS35115 Rev LINEAR LED DRIVER-CONTROLLER with 200mV CURRENT SENSE VOLTAGE Figure 1. Block Diagram Function Values Unit -0.3 to+0.3 V -40 to 150 °C -55 to 150 °C P DIS T = 25° 150° 310mW www.diodes.com AL8400 to GND. CC March 2011 © Diodes Incorporated ...
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... T = 125° 25° 15mA A OUT f < 1kHz T = -40 to125° 300kHz 0. 25° 25° 25° www.diodes.com AL8400 Min. Typ. Max. Units 0.194 0.2 0.206 V 0.210 3 0.1 1 -45 nA -200 0 0. 1.5 0.1 µ ...
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... Supply current with load current -40 -45 -50 -55 - 110 125 -60 -40 FB input current with Temperature www.diodes.com AL8400 T = 25º 1mA OUT OUT (V) CC Line regulation V =18V CC V =12V ...
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... MOSFET driving Application Information Description The AL8400 Linear LED driver controller uses an external pass element to drive the LEDs and uses its FB pin to sense the LED current through an external resistor R allows the pass element to be either an NPN transistor or N-channel MOSFET. An external resistor, R connected from the OUT pin to V ...
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... R B max + . 0 0003 . 0 0003 To ensure that the output capability of the AL8400 is not exceeded at maximum V values should be substituted back into the about 1200 @ I = 100mA, and a temperature of 85˚C which results in: FEmax C 150 = I = 0.125mA B min 1200 AL8400 Document number: DS35115 Rev ...
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... DNLS320E datasheet graph, is approximately 0.4V at 85°C and assuming V BE then the bias resistor value is: − − 516Ω this is less than 11kΩ and so the AL8400 output current is within its ratings. B min + . 0 015 . 0 000125 The value so: SET ...
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... Typical Transfer and Normalized (7.6 – 3.8 - 0.2) / 0.0003 = 12kΩ Bmax To ensure that the output capability of the AL8400 is not exceeded at maximum V substituted back into the R equation to determine the minimum allowable value for R B The maximum recommended I for the AL8400 is 15mA. The minimum V OUT − ...
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... Ground. CC OFFLINE LED LAMPS The configuration of the AL8400 also makes it suitable for controlling the current of an offline (mains) isolated LED lamp by way of an opto-coupler to drive the feedback pin of the primary-side switching controller. The current sensing of the LED current is done via R coupler ...
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... The AL8400 also provides the capability to drive longer LED chains as the voltage across the LED chain is determined by the external switch. The lower supply voltage for the AL8400 can be derived from the supply to the LED chain either by putting a series resistor to the AL8400’s V ...
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... Quantity SOT353 3000/Tape & Reel Identification code Y : Year 0 Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green 2 3 Package Identification Code SOT353 (All Dimensions in mm www.diodes.com AL8400 7” Tape and Reel Part Number Suffix -7 B4 March 2011 © Diodes Incorporated ...
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... 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 AL8400 Document number: DS35115 Rev LINEAR LED DRIVER-CONTROLLER with 200mV CURRENT SENSE VOLTAGE IMPORTANT NOTICE LIFE SUPPORT www.diodes.com AL8400 March 2011 © Diodes Incorporated ...