A new family of constant-current LED driver ICs designed to address the emerging requirements of internal and external illumination applications in the automotive market is now available from Allegro MicroSystems Europe.
The new A6261/62/64 devices have been fully qualified to the highest levels of automotive quality standards and robustness. A single device offers four channels, each providing up to 100 mA LED current, which can be paralleled for higher currents. The driver ICs operate with a low dropout voltage to minimise power dissipation, and do not require any ballast resistors.
The user-selected current is provided to four outputs with each output equally sharing the load. The A6261/62/64 family also features short-circuit to ground protection which disables the shorted channel, allowing the others to continue to operate. An open LED situation on any channel is also detected.
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