AAT3156ISN-T1

The AAT3156ISN-T1 is a charge-pump based, high-efficiency LED driver. It is designed to provide efficient and precise current regulation in a compact space-saving package. The device is ideal for driving a wide variety of LEDs from white, red and blue for backlighting and general illumination.

The device is designed with three differential inputs, VIN+, VIN–, and a high-speed Shutdown (SD) control pin that allows dimming down the LEDs to zero charge. The device features high-side current regulation with an adjustable range of 10mA to 320mA. The voltage at the cathode of the LED is clamped to a typical value of 8.50V (9.50V max).

The AAT3156ISN-T1 features a fixed-frequency charge-pump architecture with a minimum frequency of 1MHz. The low current ripple at high frequencies allows the device to provide high efficiency while saving board space. It also provides high accuracy current regulation over wide line, load, temperature and time variations.

The device is rated for operation from the 2.7V to 5.5V input voltage range and is capable of delivering up to 160mA of continuous current to the LED. The device can survive input reverse polarity and short-circuit condition for a short period of time. The device also features over-temperature protection.

The AAT3156ISN-T1 is available with a 0.5mm pitch 2x3 DFN package that allows for simple PCB layout with an area savings of more than 50% compared to SOT23 packages. It provides excellent temperature performance over its entire operating range. The device is suitable for a wide variety of applications, such as LCD and LED backlighting, battery-powered applications, and automotive lighting.

In summary, the AAT3156ISN-T1 is a high performance, space-saving charge-pump based LED driver designed for general illumination and backlighting applications. It features adjustable current regulation from 10mA to 320mA, high-speed shutdown control pin and over-temperature protection. The device is available in a 0.5mm-pitch 2x3 DFN package that offers more than 50% area saving compared to SOT23 packages.