UCC28704EVM-724

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The UCC28704EVM-724 is an evaluation module (EVM) that serves as a platform for designing and evaluating off-line SMPS (Switch Mode Power Supplies) using the UCC28704 integrated circuit. It is a high performance, low cost SMPS controller device specifically designed to achieve superior efficiency and provide fast transient response. The UCC28704EVM-724 belongs to the evaluation boards category of DC/DC & AC/DC (Off-Line) SMPS.

The UCC28704EVM-724 is designed to operate the converter in two modes. The first mode uses a fixed 150 kHz switching frequency and utilizes an isolated flyback converter topology. It is used to quickly assess the basic performance of the UCC28704 device in a simple circuit.The second mode gives the designers flexibility to explore the full performance of the UCC28704 by allowing the switching frequency to be adjusted between 50 kHz and 350 kHz. This mode uses a non-isolated, forward converter topology and requires the designers to make changes on the control circuitry.

The UCC28704EVM-724 is equipped with 12 test points and four button switches located on the board along with several connectors to aid easy setup and evaluation. It also has an on-board, two-axis magnetic field sensor, a 3-axis accelerometer, LEDs, and a potentiometer. The UCC28704EVM-724 also includes a Bluetooth transceiver to allow wireless communications with a laptop. All these features make it a perfect platform for designing and validating designs in various applications.

The working principle of the UCC28704EVM-724 is similar to that of other SMPS devices. The main components of this EVM are the UCC28704 integrated circuit, an inductor, an output capacitor, and the other control circuitry. The power will enter the UCC28704EVM-724 through an input lead and is delivered to the primary windings of the transformer through a switching transistor. The UCC28704 integrated circuit receives its power from the auxiliary winding of the transformer and provides logic signals to turn the transistor on and off. When the transistor is on, energy is stored in the inductor and when it is turned off, energy is delivered to the output capacitor thus providing regulated output voltage at the output.

The UCC28704EVM-724 has a wide range of applications in the industrial, consumer and automotive markets. Due to its ultra low standby power, the UCC28704EVM-724 is ideal for applications that require frequent start-up from a ‘cold’ state like laptops, cell phone chargers, and digital TVs. It is also suited for controlling the LED lighting of displays or automotive headlights. Moreover, with its improved features, it is applicable in many more applications such as Wi-Fi routers, home security systems, industrial automation, white goods, and renewable energy sources.

In summary, the UCC28704EVM-724 is a comprehensive and versatile platform designed to help users develop SMPS solutions that demand the highest levels of performance, reliability, and cost efficiency. The UCC28704EVM-724 exhibits fast transient response, tight line regulation, an ultra low standby power consumption, and other advantages that make it suitable for use in various off-line applications. Therefore, it is classified as an Evaluation Boards product under the DC/DC & AC/DC (Off-Line) SMPS category.

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