DIOAL8861QMP-13
Overview
The AL8861QMP-13 is an AEC-Q100 qualified hysteretic mode step-down LED driver designed for high-efficiency automotive and industrial applications. It features an integrated 40V NDMOS switch capable of delivering up to 1.5A of continuous output current while maintaining up to 95 percent efficiency. The device operates from a wide 4.5V to 40V input range and supports both analog and PWM dimming through a single control pin.
Why Choose This Part
The integrated NDMOS switch reduces external component count and simplifies PCB layout compared to external FET controllers. Its high-side current sensing and hysteretic control architecture provide excellent transient response and 5 percent current accuracy without the need for complex loop compensation. The MSOP-8EP package includes an exposed pad for enhanced thermal dissipation, allowing for sustained 1.5A operation in high-temperature environments.
Applications
Key Specifications
Getting Started
To implement a design, calculate the sense resistor value using the 0.1V nominal threshold to set the target LED current. Select an inductor that maintains the switching frequency below 1MHz and ensures peak current does not exceed the 1.5A rating. Place the input decoupling capacitor and the freewheeling Schottky diode as close to the VIN and SW pins as possible to minimize EMI.
