LED driver integrated circuits

  • 01-Nov-2011 07:51 EDT
A8502-A8514 text logo 300rgb.jpg

Allegro MicroSystems’ A8502 and A8514 are multi-output LED drivers for liquid crystal display backlighting. The devices integrate a current-mode boost converter with internal power switch and multiple current sinks. The LED sinks can be paralleled together to achieve even higher LED currents. The A8502 and A8514 can operate from a single power supply from 5 V to 40 V, which allows the part to withstand a load dump condition encountered in automotive systems. The devices, coupled with the external PMOS (positive metal-oxide semiconductor) disconnect switch, provide protection against output short and over voltage, open or shorted diode, open or shorted VLED pin, and over temperature.

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