A6276ELW-T

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The A6276ELW-T is a high-power white-LED driver from Allegro MicroSystems, first introduced in 2006. This integrated circuit is designed for use with low-power MCUs, offering an efficient solution for driving high-power LEDs. The A6276ELW-T is well-suited for automotive, industrial, consumer, and medical applications. As part of the Allegro µPower family, it offers low power consumption, high efficiency, and high accuracy current regulation.

The A6276ELW-T is a PMIC (Power Management IC) in the category of LED (Light Emitting Diode) drivers. It is a Hi-Side synchronous buck driver and provides a complete solution for driving high-power white LEDs. It can drive up to 25 LEDs in series with a maximum total voltage of 13.5V. The device is intended to work with a voltage source of 4.5V to 40V. It is capable of driving up to 6A of current with a wide dimming range and fast response time.

The device features an internal buck-Boost converter for constant current regulation with an accuracy of ±10%. Its current monitoring and cycling functions protect LED strings from overheating, short circuits, and over-current. It also has an over-temperature protection shut-off that keeps the LED current in check when the temperature exceeds its threshold. The device is capable of operating at a wide switching frequency range from 200kHz to 1MHz with very low distortion and noise.

One of the most interesting features of the A6276ELW-T is its low operating current. The device is designed to consume only 50µA of quiescent current when idle. This, along with its low power dissipation, makes it an ideal LED driver for energy-efficient applications.

The A6276ELW-T is a highly efficient driver with an input voltage range of 4.5V - 40V, an output voltage up to 13.5V, and a current range of 4mA - 6A. It is designed to accurately regulate and control the current to the LED strings, allowing the user to maintain a consistent brightness level. It also offers a wide dimming range and fast response time, making it a great option for applications requiring rapid and fine-tuning control. The device is rated for an operating temperature range of -40C to 150C, making it suitable for a wide range of applications.

In conclusion, the A6276ELW-T is a great option for driving high-power white LEDs in automotive, industrial, medical, and consumer applications. It is a PMIC (Power Management IC) in the category of LED drivers and offers a complete solution with low operating current, high efficiency, and high accuracy current regulation. It is especially well-suited for applications that require rapid and fine-tuning control, as well as a wide dimming range. The device is highly reliable and offers a wide operating temperature range of -40C to 150C.

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