TPS92515QDGQTQ1 Integrated Circuits (ICs)

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The TPS92515QDGQTQ1 is one of the many power management IC (PMIC) products from Texas Instruments, and it is a buck LED driver. The driver IC has an integrated linear current regulator, an inductor-less design, and is available in a 7-pin wafer-level chip scale package. It is designed to drive multiple sets of LED strings with the same input voltage in series or parallel configuration, and features both programmable current regulation and LED string open LED protection to help improve system reliability and extend LED lifetime.

Features

The TPS92515QDGQTQ1 features a high precision 500mV linear current regulator. This means that the current to each LED string can be programmed precisely and accurately, resulting in a more uniform illumination level over the entire LED array. The device also features a variety of useful features including LED string open LED protection, over current protection, over temperature protection, and over voltage protection. Furthermore, a low quiescent current of only 9μA helps keep the LED driver IC cool, which helps to improve system reliability and extend LED lifetime. The driver IC is available in a 7-pin wafer-level chip scale package, which makes it a great solution for designers looking for a compact solution for driving multiple sets of LEDs.

Applications

The TPS92515QDGQTQ1 offers many advantages in terms of driving LEDs, making it a great choice for a wide range of applications. Due to its precision current regulation and low quiescent current, the TPS92515QDGQTQ1 is well suited for applications such as LED backlighting, ambient light sensing, traffic signal applications, area lighting, and automotive lighting. Additionally, the driver IC’s over current, over temperature, and over voltage protection make it suitable for use in many other applications such as LCD backlighting and cardiovascular monitoring.

Working Principle

The TPS92515QDGQTQ1 is designed to drive multiple sets of LED strings with the same input voltage in series or parallel configuration. The LED driver IC operates on a “boost-buck-boost” principle, where an external capacitor is charged using the input voltage before being switched to the LED strings. This switching process is done in an efficient manner and helps to maximize the LED’s lifetime by avoiding peak currents and increasing the life of the strings. The external capacitor also helps to reduce ripple current and thus improve the overall efficiency of the device. Once the external capacitor is charged, the current regulator is used to control the current in each string, while the over current protection and the over voltage protection help to protect the external capacitor from damage.

Conclusion

The TPS92515QDGQTQ1 is a buck LED driver IC from Texas Instruments, and is designed for driving multiple sets of LED strings with the same input voltage in series or parallel configuration. It features a high precision 500mV linear current regulator, LED string open LED protection, over current protection, over temperature protection, and over voltage protection, which help to improve system reliability and extend LED lifetime. Additionally, its low quiescent current of only 9μA helps to keep the driver IC cool, making it a great choice for a wide range of applications such as LED backlighting, ambient light sensing, traffic signal applications, area lighting, and automotive lighting.

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