MAX6979AUG+T

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The MAX6979AUG+T is a low dropout dot-matrix LED driver. It belongs to the category of PMIC (power management integrated circuit) – LED drivers. This device is designed for \'out-of-the-box\' line matrix or 3D display driver applications, providing superior display performance, particularly in terms of energy-efficiency.

The MAX6979AUG+T comes with 16-bit Gray-scale PWM Controller that enables captivating animations to be created. This device also integrates a high-voltage shift register and current sink drivers that achieve superior display performance with higher accuracy and increased efficiency. With its common analog and serial interfaces, it provides versatility, easy configuration and a user friendly experience.

It is suitable for automotive, industrial and consumer display applications. Some of the features include: a 34V voltage regulator, LED open and LED short detection, LED open-circuit time limit, LED overload and LED failure protection, integrated cascadable diode, thermal shutdown and a self-shift register scan mode. The operating current of this device is only 8.6-58mA, making it a great choice for energy-efficient applications.

The MAX6979AUG+T is based on the MAX6979 chip, which is capable of driving up to 1,000 LEDs in a single 34V supply rail. The number of LED drivers is determined by the die size, so it is not limited to just 1,000 drivers. This LED driver is capable of driving pixel arrays up to 5″ x 3″. The LED drivers can be arranged in an array of any size via the on-chip shift register, allowing for multiplexing and scalability.

Regarding the working principle of the MAX6979AUG+T , the integrated voltage regulator provides a support voltage equal to the VDD input voltage. This voltage is used by the internal circuitry to regulate the current through the LEDs. The current programmed into each of the LEDs is quantized in increments of 0.5mA. In addition, the device also features a disconnect switch, which can be used to disconnect the LEDs in order to save power.

The data for the LEDs is organized in groups of 32, and is controlled using a low voltage serial interface. Each of these groups can be configured with a 16-bit PWMgray-scale controller, which allows for multiplexing and animation control.

Overall, the MAX6979AUG+T is an excellent choice for LED driver applications, due its low power consumption, high ‘out-of-the-box’ performance and its scalability. The integrated voltage regulator and on-chip shift register provide an easy way to configure and scale pixel arrays, while the 16-bit PWM gray-scale controller enables captivating animations for display applications.

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