The A8518 and A8519 LED driver ICs integrate a current-mode boost converter with internal power switch with either two current sinks (dual string) in the A8518 or four current sinks (quad string) in the A8519. Both devices target the automotive and industrial markets with end applications to include automotive infotainment and instrument cluster LCD backlighting, heads-up displays, interior lighting, accent lighting and commercial and industrial backlighting and lighting applications.
The A8518, the boost converter can drive up to 22 white LEDs, 11 LED per string, at 200 mA. The LED sinks can be paralleled together to achieve higher LED currents up to 400 mA. The A8519 boost converter can drive up to 44 white LEDs, 11 LED per string, at 100 mA each. Both devices contain high dimming ratio, string current matching, frequency dithering and fault detection. They also contain input current sensing and gate drive to control an optional input disconnect MOSFET.
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