TPS54561EVM-555

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TPS54561EVM-555 Application Field and Working Principle

The Texas Instruments TPS54561EVM-555 is an evaluation module for switching mode power supply applications. This evaluation module helps designers to evaluate the performance characteristics of the TPS54561 integrated controller for DC/DC and AC/DC switching mode power supplies. The module is designed mainly for off-line applications and provides an evaluation and development platform for evaluating the TPS54561 before implementing the designs in customer\'s application.

Features

• Evaluates current mode and voltage mode control
• Wide input voltage range of 85V AC to 265V AC
• Includes adjustable soft start and overvoltage protection features
• Integrated MOSFET drivers for enhanced system efficiency
• Small form factor size of 76.2mm x 56.7mm

Applications

The TPS54561EVM-555 evaluation module can be used in a variety of switching mode power supply applications such as:

• Power over Ethernet (PoE) applications
• LED drivers
• AC/DC off-line power supplies
• High power DC/DC converters
• Isolated flyback converters

Working Principle

The TPS54561EVM-555 uses the integrated TPS54561 current mode and voltage mode control Integrated Circuit (IC) to implement a basic flyback topology power conversion circuit. This IC combines high performance, low power loss and low cost. The device is configured with its internal comparator and a current sense resistor providing the basic loop functions of current, voltage and frequency mode control.

The integrated MOSFET drivers, along with the included bootstrap diodes, provide the necessary device turn-on and turn-off capabilities. The high efficiency and low total system cost are provided by the integrated MOSFET drivers which reduce the need for external drivers.

In addition to the basic flyback topology, the EVM also includes a full range of integrated protection and features to help ensure safe operation of the system. These features include adjustable soft start, system enable, overvoltage protection and active current sharing to help maintain good load regulation. The device also includes an external control pin to enable or disable the system.

The TPS54561EVM-555 is an excellent evaluation platform for assessing the performance characteristics of the TPS54561 IC in low current cost DC/DC and AC/DC off-line power supply applications. The integrated protection and features help to ensure safe operation while providing excellent efficiency and total system cost savings.

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