LMZ21700EVM

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Texas Instruments\' LMZ21700EVM evaluation module (EVM) is a DC/DC & AC/DC (Off-Line) switch-mode power supply (SMPS) evaluation board. It is targeted at customers who need to evaluate high-efficiency, high-voltage AC/DC and DC/DC power converters.

Application Field:

The LMZ21700EVM is ideal for use in automotive, medical, and OCP (open computing platform) applications. To meet the demands of various applications, TI also offers a wide selection of controller designs, along with pre-designed schematics, bill of materials, simulation models, and other technical documents. By leveraging these resources, system designers can speed up their development time and minimize their design risks.

Working Principle:

The LMZ21700EVM works by applying various control techniques to an AC/DC or DC/DC SMPS. First, an input voltage is provided. A PWM controller regulates the voltage and current output by applying a duty cycle to the switch inside the SMPS. The switching mechanism is typically based on pulse width modulation (PWM) or pulse frequency modulation (PFM). PWM controls the amount of power flowing through the switches in the SMPS to regulate the output voltage and current. PFM, on the other hand, controls the frequency of the switching, which, in turn, controls the output voltage and current.

In addition to these basic features, the LMZ21700EVM also offers protection features such as over-voltage, over-current, and over-temperature protection. These features help keep the system operating safely and efficiently.

In addition to the PWM and PFM capabilities, the LMZ21700EVM also has a wide range of integrated peripherals. These include a 5 Amp MOSFET, a 32 kHz programmable oscillator, a relay driver, an I2C bus, and even a programmable digital potentiometer. This array of peripherals allows designers to create a robust and highly-customizable power supply solution.

Conclusion:

The LMZ21700EVM is an ideal solution for power supply evaluation applications. It offers a range of features, including a 5 Amp MOSFET, a 32 kHz programmable oscillator, a relay driver, an I2C bus, and a programmable digital potentiometer. The evaluation board also includes protection features such as over-voltage, over-current, and over-temperature protection. This combination of features and peripherals makes the LMZ21700EVM a great choice for system designers who need to evaluate high-efficiency, high-voltage AC/DC and DC/DC power converters.

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