LM5073HE-EVAL

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The LM5073HE-EVAL evaluation board is designed to evaluate the LM5073 high-voltage, synchronous-buck controller. The Evaluation Board performs as a step-down (buck) standard configuration using synchronous rectification. It is ideal for applications in the fields of DC/DC and AC/DC off-line SMPS.

The LM5073HE-EVAL evaluation board consists of two features: the main board and the evaluation board. The main board includes the power stage components: the MOSFET, Schottky diode, and all other necessary components for building a buck converter application. The evaluation board includes the LM5073 high-voltage, synchronous-buck controller, and the required supporting circuitry components and external protection devices. With the evaluation board, it is possible to evaluate the performance of the LM5073 in a typical buck application.

The LM5073HE-EVAL evaluation board is highly versatile, making it particularly suitable for prototyping a wide range of buck DC/DC and AC/DC off-line SMPS. The evaluation board is designed to help users quickly study and optimize the system performance of the power converter. It also enables system designers to rapidly verify and adjust the operating parameters of the system. This board is ideal for power supply applications such as lighting, LED displays, and DC power supply systems. Furthermore, the board is equipped with protection features that guard the filter inductor against overcurrents and saturation.

The operating principle of the LM5073HE-EVAL evaluation board is fairly simple. The board incorporates a power stage consisting of two power transistors, a Schottky diode in a conventional buck topology. The power stage is then driven by a controller, the LM5073. The LM5073 controller acts as a switching voltage regulator which controls the switching of the transistors. The switching voltage regulator is fed by two input sources, one from the output of the transformer and one from the output of the power supply. The switching voltage regulator controls the switching cycles by providing a pulse width modulated (PWM) signal to the power transistors that modulates the output current in response to changes in input voltage.

The LM5073HE-EVAL evaluation board features a comprehensive array of integrated protection features. The board is designed to protect against overload As well as under voltage and short-circuit conditions. The protection features include an an over-temperature shutdown, an over-current comparator, a low-voltage comparator, and programmable trip points as well as an external fault signal generator. Additionally, the evaluation board features an integrated ESD protection circuitry that protects the IC against static discharge, an over-voltage inhibitor that limits the output voltage, and an adjustable line under-voltage lockout to prevent system startup under unsafe levels of input voltage.

The LM5073HE-EVAL evaluation board is an ideal tool for testing and prototyping DC/DC and AC/DC off-line SMPS. The board is suitable for applications in the fields of lighting, instrumentation, LED displays, and battery-powered systems. In combination with the LM5073, the board provides a reliable and robust platform for power supply control and protection. With its integrated protection features, the board is able to protect the system from overload and short-circuit conditions, while offering a high level of accuracy and efficiency.

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