UCC25600EVM

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UCC25600 is an offline switch-mode power supply (SMPS) controller integrated circuit developed by Texas Instruments (TI). It has been designed for use in wide variety of applications from industrial, consumer and communications systems. The UCC25600EVM is an evaluation board designed by TI to help evaluators and developers of SMPS applications quickly prototype, test, evaluate and demonstrate the use of the UCC25600 IC. In this article, we will take a look at the UCC25600EVM application field and working principle.

The UCC25600EVM is designed for applications such as switch-mode power supplies (SMPS) and adaptors for consumer applications, including laptops, CPUs, and adapters for AC/DC chargers. It is also suitable for secondary-side control of synchronous rectification with phase-shift control, as well as isolated power management for communications and industrial systems. It operates as an interleaved, pulse-width modulation (PWM) controller controller for high efficiency in flyback, buck, and boost SMPS topologies, with a wide range of operating frequencies from 100 kHz to 1 MHz.

The UCC25600EVM also features multiple overload protection circuits such as overvoltage, over-temperature, and current limit. Additionally, it has integrated functions such as leading-edge blanking (LEB) and valley current control, making for a complete SMPS solution. The EVM supports input voltage range of 8-24V DC, and has jumpers which allow for different overload current and voltage limits to be set.

The UCC25600EVM has a 12V/3A-rated SMPS which can provide an output of 5V/2A. This SMPS operates in an interleaved flyback mode, in which the two channels are turned on/off at the same time in order to reduce output ripple voltage. The board also features an integrated low-RDSon MOSFET driver for reduced losses. The EVM also has a high-voltage start-up circuit which helps to reduce the inrush current.

The operating principle of the UCC25600EVM is based on the operation of the UCC25600 IC. The IC uses a fixed frequency regulated pulse width modulation (PWM) architecture to control the output voltage, with integrated functions for unique topologies like interleaved flyback converters. The PWM controller is enabled through an LED voltage regulator (VR) signal, which is used to turn the SMPS on/off. The controller\'s PWM cycle is determined by an external resistor and capacitor, which in turn determine the switching frequency. The integrated valley current control (VCC) and leading-edge blanking (LEB) features are also used to further improve the efficiency of the converter.

The UCC25600EVM board also features a digital controller interface which allows the user to monitor the status of the SMPS. This LED display helps users get real-time feedback on the system\'s performance, such as switching frequency, output voltage, and other parameters. Furthermore, the board has several test points to allow for easier troubleshooting, as well as an evaluation PCB to enable easy evaluation of the various features of the UCC25600 IC.

In conclusion, the UCC25600EVM is an excellent evaluation board that can be used to quickly prototype, test, and evaluate various SMPS applications. With its integrated features, wide operating frequency range, and support for numerous topologies, the UCC25600EVM is a perfect platform for evaluating the performance of the UCC25600 IC.

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