LM3502ITL-35/NOPB

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Integrated circuits have become increasingly important in modern electronics as they offer simplicity and reliability. The LM3502ITL-35/NOPB is a Pulse Width Modulation (PWM) current regulator integrated circuit (IC) optimized for driving high current LED strings. This Power Management Integrated Circuit (PMIC) is part of TI\'s LED Driver family, which includes LED controllers, LED backlights, and LED drivers, among others. It provides protection against LED shorts, over-temperature conditions, and current limiting. This IC is typically used to control high-current LED loads in a variety of applications, such as edge-lit signs, automotive lighting, high-power LED lighting, and LCD backlighting.

The circuit\'s operating principle is based on pulse-width modulation (PWM), which is a form of digital modulation used for controlling the amount of power supplied to a load. This is accomplished by pulse-width modulation of the supply current, with a shorter pulse width providing less power and a larger pulse width providing more power. The LM3502ITL-35/NOPB is designed with built-in current regulation, thermal protection, and short circuit protection to ensure that the load is not over-driven. The IC features a fixed frequency of 500 kHz, which provides the benefits of improved efficiency and EMI reduction. Additionally, the IC offers adjustable current control, enabling users to set the driver to produce a constant current for the LEDs.

The LM3502ITL-35/NOPB IC provides a wide range of integrated features for LED drive applications. It is packaged in a compact 5-pin SOT-23 package, which minimizes board space. The circuit features wide Vin range from 4.5V to 26.5V, with a wide adjustable output current range of 6mA to 200mA. It also provides protection against LED shorts and over-temperature conditions, and it includes circuit protection against reverse current, over-voltage and under-voltage conditions. Moreover, the IC includes slew rate control, which reduces the voltage and current noise, while still providing the necessary current regulation. Finally, the IC also includes LED current regulation accuracy of ±10%, which ensures precise LED drive.

The LM3502ITL-35/NOPB is an ideal choice for LED driver applications due to its high-efficiency, low noise operation and advanced safety features. It provides reliable and consistent current control for up to 200mA of output current at a PWM frequency of 500 kHz. Additionally, the IC features adjustable slew rate, integrated short circuit and over-temperature protection, and precise LED drive accuracy. The IC is a great choice for applications that require precise current regulation, such as edge-lit signs, automotive lighting, high-power LED lighting and LCD backlighting.

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