AL8400 Datasheet, PDF (1/12 Pages) Diodes Incorporated – 0.2V LINEAR LED DRIVER CONTROLLER

AL8400
0.2V LINEAR LED DRIVER CONTROLLER
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 0.2V FB pin, it
controls the regulation of LED current with minimal power
dissipation when compared to traditional linear LED drivers.
This makes it ideal for medium to high current LED driving.
The AL8400 open-collector output can operate from 0.2V to
18V enabling it to drive external MOSFET and Bipolar
transistors. This enables the MOSFET and Bipolar selection
to be optimised for the chosen application. It also provides
the capability to drive longer LED chains, by tapping V_CC from
the chain, where the chain voltage may exceed 18V.
It is available in the space saving low profile SOT353
package.
Features
• Low reference voltage (V_FB = 0.2V)
• -40 to 125ºC temperature range
• 3% Reference voltage tolerance at 25°C
• Low temperature drift
• 0.2V to 18V open-collector output
• High power supply rejection
• (> 45dB at 300kHz)
Pin Assignments
E1 1
(Top View)
GND 2 _AL8400
VCC 3
Applications
• Isolated offline LED converters
• Linear LED driver
• LED signs
• Instrumentation illumination
Typical Application Circuit
5 OUT
4 FB
AL8400
Document number: DS35115 Rev. 1 - 2
1 of 12
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December 2010
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