Diodes Inc.’s Low-Dropout Linear LED Driver-Controller Features Enhanced Dimming

July 9, 2019 Alix Paultre

Diodes Incorporated released the AL5814Q automotive-compliant linear LED driver-controller with low dropout voltage and open LED detection for automotive linear-driven LED lamps. Suitable for automotive applications requiring specific change control, the AEC-Q100 qualified, device has a grade 1 temperature rating, is PPAP capable, and is manufactured in IATF16949:2016 certified facilities.

Accepting an input voltage from 4.5V to 60V, the device has up to 15mA drive and uses an external drive transistor, MOSFET or BJTs, minimizing power dissipation. The AL5814Q’s VSET pin can be used to adjust output current feedback level for a lower dropout via resistor divider, analog dimming and thermal fold-back, the latter being implemented using an NTC resistor.

PWM dimming is supported through applying a PWM signal to the VFAULT pin, and over-temperature protection is also included, along with input under-voltage lockout. Open-LED detection, via the VFAULT pin, can also be supported with its activation via the SFAULT pin. The AL5814Q’s 0.4V reference voltage (±5 percent across temperature) provides a high level of thermal stability and matching between lamps.

The AL5814Q is available in the exposed MSOP-8EP package and is priced at $0.25 each in 1,000 piece quantities.

Learn more at www.diodes.com.

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