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Allegro MicroSystems driver makes the auto grade
The A6260 from Allegro MicroSystems Europe is a high-brightness constant-current LED driver IC to operate over typical automotive voltage/temperature ranges.
Input voltage range is specified down to 6V, and the device will operate at up to 40V. The linear constant-current output can be adjusted to deliver up to 350mA in a typical application.
An ‘enable’ input is used to activate the LED drive and can also be driven with a pulse-width-modulated input to dim the LED brightness. To help minimise electromagnetic interference, the slew rate of the output current is controlled during switching. In addition, the ‘enable’ pin will cause the IC to enter into a low quiescent sleep mode if held low.
Several automotive-grade protection features are included: the IC is fully protected against short circuits to ground or battery, and a thermal shutdown circuit disables the IC if the junction temperature reaches +165°C. In addition, integrated reverse battery protection eliminates the need for an external reverse battery diode.
Typical applications for the A6260 include automotive interior lighting such as map lights and dome lights, and exterior lighting such as rear indicator and brake lights. Industrial and consumer LED lighting applications will also benefit from the device’s feature set.
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