A synchronous step-down LED driver with high-side current sensing, Diodes’ AL8891Q drives up to 2 A of continuous current from a 4.5-V to 65-V input. It also supports up to a 95% duty cycle, enabling the driver to power longer LED chains in various automotive lighting applications.
The AL8891Q uses constant on-time control for simple loop compensation and cycle-by-cycle current limiting, offering fast dynamic response without needing an external compensation capacitor. Its adjustable switching frequency, ranging from 200 kHz to 2.5 MHz, optimizes efficiency or enables a smaller inductor size and more compact form factor. Spread spectrum modulation further enhances EMI performance and aids compliance with the CISPR 25 Class 5 standard.
Two independent pins control PWM and analog dimming. PWM dimming, from 0.1 kHz to 2 kHz, enables high-resolution dimming. Analog dimming, ranging from 0.15 V to 2 V, supports soft-start and other adjustments. The AL8891Q also features comprehensive protection with fault reporting.
The AEC-Q100 Grade 1 qualified AL8891Q driver costs $0.78 each in lots of 1000 units.
Find more datasheets on products like this one at Datasheets.com, searchable by category, part #, description, manufacturer, and more.
The post 2-A driver powers automotive LEDs appeared first on EDN.