AAT2823TIBK-T1

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The AAT2823TIBK-T1 is a white LED driver PMIC, purpose-designed for high output current operation and extremely low power consumption. It provides a constant LED current output and dimming control of LED brightness. The AAT2823TIBK-T1 is a highly integrated solution consisting of a 39V BCDMOS power stage, a 200mA current regulator, high/low side channel selectable shift registers and other components which are optimized for white LEDs and other controlled area light sources.

The AAT2823TIBK-T1 is ideal for applications requiring narrow regulated LED currents on up to 16 strings of white LEDs. With the integrated dual color shift registers, the user can easily select one of the two built-in sequences to accurately control the brightness of each string of LEDs. The AAT2823TIBK-T1 can provide both constant current and pulse width modulation (PWM) dimming control.

In terms of applications, the AAT2823TIBK-T1 can be used for automotive, industrial, and consumer lighting applications. Examples of potential applications include but are not limited to exterior and interior vehicle lighting, backlighting for LCD and OLED displays, decorative lighting, door lights, and general illumination in industrial and home applications.

The working principle of the AAT2823TIBK-T1 LED driver is as follows. The LED control interface first sets up the LED control parameters like LED current level and PWM dimming Duty cycle. The internal operating parameters are programmed according to the LED control parameters. The internal control stage calculates the desired programmed LED current level and uses the auto-zero function to safeguard the LED current level when the external conditions change, ensuring that the LED current level remain consistent over varying supply and temperature conditions. Finally, current sources are used to drive the LEDs connected to each of the 16 LED string outputs.

The AAT2823TIBK-T1 LED driver integrates the LED current source, LED control registers, and MOSFET power stages into a single PMIC. This simplifies the design process and helps reduce overall cost and size. Additionally, the high output current and low quiescent current allows the AAT2823TIBK-T1 to be used in a wide variety of applications. The AAT2823TIBK-T1\'s integrated auto-zero circuitry, low-noise switching architecture, and low quiescent current draw makes this LED driver an ideal choice for automotive, industrial, and consumer lighting applications.

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