AAT1236IRN-T1

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PMIC LED drivers are electric circuits that are used to power light emitting diodes (LEDs). The AAT1236IRN-T1 integrated circuit (IC) is an adjustable driver for white LED backlight applications that supports a wide range of LED lighting devices. It offers a constant current, wide input voltage range, small footprint, and flexibility for any application type, making it a good choice for a variety of lighting projects.

AAT1236IRN-T1 Application Field

The AAT1236IRN-T1 is best used in LED lighting products that need a wide input voltage range such as mobile phones, LCDs, camcorders, and others. It features an adjustable LED current, low current ripple, low noise, small foot print, and a wide adaptive range, making it ideal for PLCC-6, SOP-8, and TDFN-8 type package. It also provides an ultra-low start-up current making it suitable for very small to large power supplies.

The AAT1236IRN-T1 is also suitable for driving external high power LEDs in both single and multiple channels. It supports a wide range of configurations from 200mA to 1A and from a single to 4 channels. The adjustable current range and its high load regulation ensure a precise light output for a wide variety of LEDs, such as surface mount device (SMD) LEDs and power LEDs.

AAT1236IRN-T1 Working Principle

The AAT1236IRN-T1 is an integrated switch-mode LED driver. It has two input pins, a current sense input pin (VSNS) and a drain voltage pin (VOUT). The current sense pin (VSNS) provides feedback from the LED backlight to the driver, regulating the LED driver\'s current output. The drain voltage pin (VOUT) monitors the output of the LED driver and provides feedback to the driver.

The AAT1236IRN-T1 has a voltage loop for output voltage regulation and a current loop for current sensing. The voltage loop senses the output voltage of the LED backlight and regulates it by adjusting the pulse width of the switch. The current loop senses the current flowing through the LED backlight and adjusts the pulse width accordingly.

In this way, the constant output current of the LED backlight is maintained while the voltage loop maintains the output voltage of the LED backlight. This also enables the AAT1236IRN-T1 to maintain a wide range of LEDs current in various operating conditions. The IC is also designed to provide high efficiency and low EMI, thanks to the optimized regulation scheme.

Conclusion

The AAT1236IRN-T1 is an efficient, adjustable driver for white LED backlight applications. It has a wide input voltage range, adjustable current range, low start-up current, and high load regulation that make it ideal for any lighting application. Its constant current and voltage loops ensure a precise light output for a wide variety of LEDs. With these features, the AAT1236IRN-T1 is an excellent choice for powering any LED lighting product.

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