With an operating voltage range of 4.5V to 60V, the AL5816Q supplies an output drive current of 15mA to 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 optimise the external transistor makes the AL5816Q suited for a range of 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, means that automotive manufacturers can achieve a significantly lower BOM for a wide range of automotive applications using the AL5816Q. 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 minimising the drop-out voltage and reducing the LED system power dissipation, particularly when compared against traditional linear LED controllers.
The high-output drive current allows the AL5816Q to drive a single LED, an LED chain or multiple LED channels, as required by automotive manufacturers. The PWM dimming input accepts a signal operating at up to 50kHz. The device also features a number of protection features including input under-voltage lock-out and overtemperature shutdown.
