LM5050MK-2EVAL/NOPB

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The LM5050MK-2EVAL/NOPB is an evaluation board used to evaluate a Texas Instruments\' LM5050 Voltage Mode DC-DC Converter in 5mm x 6mm DFN package. The LM5050 is a CMOS switch-mode step-down DC-DC converter using a Valley-Current-Mode control topology. It features a high-performance, soft-switching operating frequency up to 1.2GHz, allowing a 100-kHz switching frequency for small, low-profile 2mm tall packaging.

The LM5050MK-2EVAL/NOPB evaluation board is a 8-leadPDI mounted on a 4×1-inch board with different features for different applications:

• 1. Sensing and controlling output voltages, currents, and errors.
• 2. Maintaining the input and output capacitors and inductor values for the step-down regulator/controller.
• 3.Supplying gate drive signals to the LM5050 for peak current-mode control.
• 4. Scaling the regulation accuracy for various applications.

The LM5050MK-2EVAL/NOPB evaluation board is powered by a 5 to 30 VDC input, and the output can range from 0.7 to 2.5V DC. The board features an 18 V output voltage range and a 250 kHz to 1.2 GHz frequency range for the converter\'s control circuitry.

The evaluation board implements the LM5050 voltage mode DC-DC converter to step down the input voltage to an output voltage using the Valley-Current-Mode control topology. The board includes various components to sense and control the output voltage, current, and error. These include resistors, a diode, capacitors, inductors, switches, and a microcontroller (MCU). The microcontroller tracks the current and output voltage, and it provides gate drive signals to the LM5050 for optimized peak current-mode control.

The board implements a buck-boost circuit with an insulated gate bipolar transistor (IGBT) to lower the input voltage while decreasing the power loss through conduction and switching. To maintain the input and output capacitors and inductor values for the step-down regulator/controller, the board includes a relaxation oscillator and two half-bridge oscillators to balance the output voltage over the entire input range.

The board also includes several features to scale the regulation accuracy for various applications. For instance, the board includes an adjustable output resistance to reduce the output voltage ripple, temperature sensors to monitor the operating temperature of the components, and an adjustable oscillator frequency to increase or decrease the switching frequency. The board also provides options for interfacing with an external system and a connection to connect a programming port.

Overall, the LM5050MK-2EVAL/NOPB evaluation board is an excellent tool for evaluating the LM5050 Voltage Mode DC-DC Converter in 5mm x 6mm DFN package. With its various features, it can help engineers to optimize the converter\'s performance for different applications. The board simplifies evaluation of the LM5050, while also providing a cost-effective solution for testing and prototyping.

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