AL5801
100V, ADJUSTABLE CURRENT SINK LINEAR LED DRIVER
Description
The AL5801 combines a 100V N-channel MOSFET with a p...
AL5801
100V, ADJUSTABLE CURRENT SINK LINEAR LED DRIVER
Description
The AL5801 combines a 100V N-channel MOSFET with a prebiased
NPN transistor to make a simple, small footprint LED driver. The LED current is set by an external resistor connected from REXT 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.
Pin Assignments
(Top View)
REXT
ADVANCE INFORMATION
SOT26
Features
Feedback pin reference voltage VRSET = 0.56V at +25ºC -40 to +125ºC temperature range 1.1V to 100V open-drain output Negative temperature VRSET co-efficient automatically reduces the LED current at high temperatures Lead-Free Finish; RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Low thermal impedance SOT26 package with copper lead frame
Applications
Linear LED drivers LED signs Offline LED luminaries
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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 Incorpor...