60V linear LED controller offers fast dimming to car lighting

April 01, 2019 //By Julien Happich
60V linear LED controller offers fast dimming to car lighting
Diodes Incorporated’s AL5816Q is an automotive-compliant linear LED controller with an operating voltage range of 4.5V to 60V for an output drive current of 15mA.

The chip can control LED lights through an external BJT, delivering a constant current of a few mA up to 1.5A, or higher LED current if a MOSFET is used. This ability to optimize the external transistor makes the AL5816Q well-suited for many automotive LED lighting applications, such as rear light clusters, interior illumination, instrument panels, and license plate lighting. The combination of a high-input voltage and high-output drive current, coupled with a versatile high-voltage PWM dimming feature (taking a signal up to 50kHz) allows significantly BOM savings for a wide range of automotive applications. The 5-pin SOT25 package requires very few external components and does not need a separate switching inductor. It features a high-voltage PWM input for LED light dimming. The feedback pin operates at just 200mV, enabling the AL5816Q to control the LED drive current precisely while minimizing the drop-out voltage and reducing the LED system power dissipation, particularly when compared against traditional linear LED controllers.

Diodes Incorporated - www.diodes.com


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