Allegro MicroSystems A8517

  • 24-Sep-2013 08:07 EDT
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Allegro's A8517

Allegro MicroSystems, LLC’s new A8517 is a programmable multi-output LED (light-emitting diode) driver. The A8517 has a current-mode boost converter with internal power switch and 10 I2C programmable current sinks, and it can also provide 5000:1 contrast ratio PWM (pulse-width modulation) dimming at 200 Hz. It operates from 4.5 to 36 V and can withstand up to 40 V load-dump conditions. The I2C allows for LED currents to be set individually, up to 60 mA per LED channel. The PWM dimming duty cycle is also independently controlled, and each channel can be enabled/disabled independently. This product protects against output short and overvoltage, open or shorted diode, open or shorted LED pin, shorted boost switch or inductor, and IC over-temperature. The IC can drive an external P-FET (P-channel field-effect transistor) as input disconnect switch that is triggered by an integrated current sense. The A8517KLPTR-T is available in a 28-pin eTSSOP package.

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