DIOAL8843SP-13
Overview
The AL8843SP-13 is a hysteretic mode DC-DC step-down converter designed for driving LEDs with a constant current up to 3A. It operates from an input voltage range of 4.5V to 40V and integrates a high-side output switch to minimize external component count. The device supports both PWM and analog dimming through a single control pin.
Why Choose This Part
The SO-8EP package features an exposed pad for enhanced thermal dissipation, allowing the device to maintain 4 percent output current accuracy at up to 3A. Integrated protection features like Soft-Start and LED short-circuit protection reduce the need for external safety circuitry. Its high-side current sensing and hysteretic control simplify loop compensation and circuit design.
Applications
Getting Started
To begin development, ensure the exposed pad is soldered to a large PCB copper area for optimal thermal performance. Use a low-ESR ceramic capacitor for input decoupling and a fast-recovery Schottky diode for the freewheeling circuit. Dimming can be implemented by applying a PWM signal (up to 2kHz for high linearity) or a DC voltage to the CTRL pin.
