The A6812SA is a serial-input, constant-current LED driver with an integrated shift register, manufactured by Allegro MicroSystems. It's designed to control LED displays and lighting applications efficiently.

Applications

• LED matrix displays
• Backlighting for displays
• Automotive lighting (e.g., dashboard indicators)
• Signage
• General LED lighting control

Features

• Constant-current outputs for uniform LED brightness
• Serial input interface for easy control
• Integrated shift register
• Output voltage up to 50V
• PWM dimming control

Benefits

• Provides consistent LED brightness across the display due to constant-current outputs.
• Simplifies control and reduces microcontroller overhead with the serial input interface.
• Reduces external component count with the integrated shift register.
• Suitable for a wide range of LED lighting applications with a high output voltage.
• Enables adjustable LED brightness with PWM dimming control.

Additional Details

The A6812SA supports a wide input voltage range, typically from 3V to 5.5V for the logic supply and a higher voltage for the LED supply. It often includes built-in protection features such as over-temperature protection and open-circuit LED detection. Datasheets include detailed timing diagrams for the serial interface, as well as recommended external components for optimizing performance and ensuring proper thermal management. The number of constant current outputs is a key specification to consider when selecting this driver for a specific LED display application.