AL8860 LED regulator provides up to 40-W output

By Debbie Sniderman

The AL8860 hysteresis-mode DC/DC step-down converter is designed for driving single or multiple series‑connected LEDs efficiently from a voltage source higher than the LED voltage. With an integrated MOSFET, it targets low-voltage industrial and automotive LED lighting applications as well as illuminated signs and backlighting, and it replaces low-voltage halogen lamps in LED retrofits.

Operating with a 4.5- to 40-V input supply, the AL8860 can directly source a 1-A output current in either a five-pin TSOT25 package or up to 1.5 A in a more thermally efficient eight-pin MSOP8-EP package. It provides up to 40 W of output power depending on supply voltage and external components. It offers a power-saving standby mode, deep dimming from 0% to 100%, soft-start operation, and protection against overtemperature and LED short and open circuits.