UCC25702D

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UCC25702D Application Field and Working Principle

UCC25702D is an advanced, high-performance, integrated DC-DC switching controller, belonging to the category of PMIC (Power Management Integrated Circuits) – Voltage Regulators – DC DC Switching Controllers. Specifically, it is a bipolar chopper regulator that integrates a high voltage, controllable series switch with an on-chip, low voltage reference and regulated output driver.

This device is designed as a direct replacement for linear LT Series LDO (low-dropout linear regulator) and provides the user with improved system performance and efficiency compared to its counterparts. Its low operating temperature enables the device to be used in high-power 7/24 operating environments without any additional cooling measures such as heat sinks or additional fans.

Applications

The UCC25702D is mainly employed in applications requiring regulation of a wide range of input voltages as well as tight output voltage accuracy. These applications may include but are not limited to:

• Motor Drives
• Industrial Automation
• Lighting Control
• Power Supplies
• Telecommunication Equipment
• Medical Equipment

Working Principle

The UCC25702D is designed to operate in synchronization with an external clock signal. Internally, it utilizes a high-voltage series switch that is driven by an optimized PWM (pulse width modulation) algorithm. The device can then quickly and accurately control the output voltage of the device with minimal distortion.

The power is delivered to the output terminals through an internal pass transistor, which is configurable and controlled via the external clock signal. The dynamic voltage regulation of the UCC25702D is triggered by the external sensing circuit and by errant load amplitudes, thus providing dynamic protection against output voltage spikes.

The UCC25702D offers a wide range of output voltage capabilities, from 2.5 to 28V. It can also provide up to 2A of output current, making it suitable for various applications. It also offers short circuit protection and thermal shutdown capability that is enabled by an integrated thermal warning and shutdown circuit.

Summary

The UCC25702D is a high-performance, integrated DC-DC switching controller belonging to the PMIC category. It provides improved system performance and efficiency compared to its linear LT series LDO counterparts, suitable for applications requiring regulation of a wide range of input voltages, such as motor drives, industrial automation, lighting control and power supplies. It has an operating temperature of -25 to 125°C, with a maximum of 2A of output current, wide range of output voltage requires (2.5V to 28V) and features like overcurrent protection and thermal shutdown.

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