AAT2439AISX-T1

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The AAT2439AISX-T1 is a PMIC-LED driver from Skyworks Solutions, Inc. It is specifically designed to drive LEDs in automotive and other applications. The integrated circuit provides a Thermally-Enhanced, Power MOSFET Driver with over-temperature protection, fault reporting and short circuit protection for Wire Bond, solder and plastic-based light emitting diode (LED) packages. It provides the necessary power, precision and flexibility for automotive, industrial, and other lighting applications.

The AAT2439AISX-T1 is a three channel high-side current regulator designed to drive high power LEDs. It supports both linear and pulse-width-modulation (PWM) based LED dimming. Each LED is individually adjustable and has a standby current mode. The device is optimized for LED strings with voltages up to a 48V open-circuit and can drive up to 5A with an output voltage up to 25V when a low side current sense resistor is added. Additionally, the device imposes no restriction on the number of LEDs per string.

This device has built-in features to drive LEDs at the desired lumens with high accuracy. A VCC supply voltage of 7V to 48V is required for linear and 11V to 48V for PWM mode. A VCC regulator internal short-circuit protection is provided to detect and suspend LED current through the LED string. A programmable LED current limit from 0.75A to 5A can be achieved by setting the external current sense resistor (R_ISNS). An overvoltage protection circuit is also included to detect and protect the output if it goes beyond the 24V rating. Overall, the device is designed to operate in a wide range of temperature conditions (-40°C to +85°C).

The AAT2439AISX-T1 also has integrated over-temperature protection and fault reporting mechanisms. The over-temperature protection works in an open-loop operation and has an adjustable fault threshold trip point. If the device exceeds the threshold, it will shut off the outputs and trip the over-temperature fault flag. The fault flag can be reset manually or when environment temperatures return to normal. The thermally-enhanced housing of the device ensures that it achieves a thermal performance beyond the requirements of automotive applications. The device also has a short-circuit protection circuitry to protect LEDs from the short-circuits. This feature ensures that LEDs do not draw too much current and overheat.

The AAT2439AISX-T1 is a highly integrated and easy-to-use device for LED driving applications. It has a wide operating range and integrated over-temperature protection and fault reporting mechanisms. The device is capable of driving up to 5A in a wide range of temperature conditions (-40°C to +85°C). It is designed to achieve a thermal performance beyond the requirements of automotive applications, and is suitable for both linear and PWM LED control. This device provides a high degree of flexibility and precision for automotive, industrial, and other lighting applications. It is ideal for a wide range of applications such as headlight, taillight, sensing indicators and fog lamps.

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