AAT2823AIBK-T1

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AAT2823AIBK-T1 (AAT2823), which belongs to the PMIC - LED Drivers family, is an adjustable device that provides constant current support and brightness control to LED circuits. It has a wide input voltage range from 2.8V up to 6.9V, allowing it to be used as a forward voltage source for LED lighting applications. The device offers two current range selections: 50mA to 1A and 100mA to 1.7A. It also features a wide dimming range of 0.1% to 40%, with a wide adjustment range of 64-steps. With these features, AAT2823 is suitable for a variety of LED lighting applications.

The working principle of AAT2823 can be defined as a straightforward linear current regulation process using a sense resistor. When the SENSE pin is connected to ground, the device will monitor the voltage and current draw from the LEDs. The SENSE pin senses the voltage across a series resistor, and a control circuit will automatically adjust the current based on the input voltage. This will result in a constant current going through the LEDs and keep their brightness consistent.

Apart from its linear current regulation feature, AAT2823 also features a Pulse-Width Modulation (PWM) dimming function. This means that the device can be used to dim or brighten the LEDs with a PWM signal of up to 1MHz. The duty cycle of the PWM signal can be adjusted to control the intensity of the LED brightness. In addition, the device has an open-drain output to indicate the status of the LED which helps designers to know whether the LED is on or off.

AAT2823 is suitable for use in a wide range of LED lighting applications such as general purpose backlighting, accent lighting, billboard displays and car headlights. It is also suitable for OLED displays, as its wide dimming range allows it to control the display brightness without sacrificing image quality. Moreover, the device can also be used for LED backlighting for liquid crystal displays.

In conclusion, AAT2823 can provide efficient, adjustable current regulation for LED lights, offering an optimized solution for a variety of lighting applications. Its linear current regulation and PWM dimming features make it a versatile device that can be used for a wide range of LED lighting applications. As such, it is an excellent choice for designers of LED lighting solutions.

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