Suited for backlighting medium LCD displays, the A8501 high-power LED driver with output disconnect integrates a boost converter and four 100-mA current sinks. LED channels can be tied together for up to 400-mA sink capability. Operating frequency can be set up to 2 MHz in order to avoid interference with the AM radio band in automotive applications.
The integrated boost DMOS switch is rated for 40 V at 3.6 A. PWM dimming allows LED currents to be controlled at up to a 1,000:1 ratio. Additional 4:1 dimming can be achieved by using the DIM pin. The A8501 also includes adjustable OVP and provides protection against output connector shorts through an integrated output disconnect switch. Housed in a 28-pin TSSOP package, the part operates from a single power supply of 8 to 21 V and withstands up to 40 V. ($2.36 ea/1,000 — 16 weeks ARO.)
Allegro MicroSystems , Worcester , MA
Sales 508-853-5000
Advertisement
Learn more about Allegro MicroSystems
