INN2025K-TL

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INN2025K-TL is an integrated switch mode power supply (SMPS) for offline AC-DC power supplies and converters that adds programmable current-limiting and slope compensation features to traditional step-down converter designs. Started as a reverse-polarity protection+ load switch design, the INN2025K-TL is now a complete power system that takes an input voltage of up to 1500VAC and supplies a precisely regulated 1.2V to 150V output voltage at up to 5A current output.

The INN2025K-TL is ideal for powering high-performance, cost- and energy-efficient electronics such as computing, consumer, medical and other end-equipment appliances. The power system has a high-efficiency, low-ripple, high-precision step-down switching feature and comprehensive output protection, which makes it suitable for a wide range of applications.

Working Principle

The INN2025K-TL is a synchronous buck converter with a typical constant voltage loop. The power system has a Zero Volt Quick Turn-On (ZVQTOR) feature, which enables it to turn on within 0-V DC input, allowing it to retain its preset output voltage even when the power fails or input voltage drops to zero.

The main components in the INN2025K-TL’s synchronous buck converter include a master control IC, two MOSFETs, a current-sense resistor, an inductor, and two capacitors. The master control IC eliminates the need for a secondary loop, providing better voltage regulation and stability.

The master control IC has a current-limiting feature that is programmable by a pair of resistors. This achieves current-limiting accuracy within 3%. The master control IC also has a slope compensation feature that enables a fine-tuned compensation cycle to be programmed to reduce output voltage deviation from the preset value due to the input current.

The MOSFETs and the current-sense resistor both have a high level of integration and provide reliable current sensing. The synchronous rectifier MOSFETs have a low-charge threshold, which keeps conduction losses to a minimum. The inductor also has a high level of integration, with high power-handling and low DC resistance that ensures high accuracy in the system\'s output voltage.

The power system also includes a pair of low-ESR output capacitors that provide stable output voltages over a wide range of input voltages and load conditions. The output capacitors also reduce input/output voltage ripple and provide circuit protection from transients.

In addition, the power system has built-in thermal protection to prevent it from overheating and a ZVQTOR circuit that helps provide quick and reliable startup.

Application Field

The INN2025K-TL is a highly integrated, efficient and high-precision power supply for offline AC-DC applications. It is suitable for a wide range of applications, including computing, communications, consumer electronics, industrial and medical equipment, automotive electronics, and point-of-sale systems.

The INN2025K-TL is also well-suited for high-performance and cost-effective applications. It has a high degree of integration and can provide stable, low-ripple output voltages for a wide range of input and load conditions. In addition, it is designed for low-noise operation, making it ideal for IoT and wearable device applications.

The power system has low component count and low component height. It is designed for surface mounting and can be used in a wide range of industrial and consumer electronics applications. It is also RoHS- and REACH-compliant.

Overall, the INN2025K-TL is an ideal solution for powering cost- and energy-efficient electronics. It is highly integrated, efficient, reliable and suited for a wide range of applications. With its high-precision regulation, current-limiting and slope-compensation features, it is an ideal choice for a wide range of AC-DC applications.

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