MIC28304-1-5V-EV

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MIC28304-1-5V-EV belongs to the evaluation boards of DC/DC & AC/DC (Off-Line) SMPS. It is a low-voltage monolithic 2-A switched-mode power supply (SMPS), operating from a 5-V input voltage. With the help of the MIC28304-1-5V-EV evaluation board, engineers can not only test and develop their designs, they can also use them as reference designs in their applications.

The MIC28304-1-5V-EV is a single-chip, 5-V input voltage, high-frequency, switch mode power supply, optimized for energy efficiency. It is designed to provide a high output voltage accuracy and current output accuracy with an efficient power conversion rate of up to 97%, and to reduce the number of external components.

The main component of the MIC28304-1-5V-EV is the PWM controller, MIC28304. It includes: an adaptive on-time driver, current sensing and control circuits, voltage sensing and control circuits, thermal shutdown circuitry, and a high-level protection circuit. The MIC28304-1-5V-EV also uses the High-Side-N MOSFET switch and the Low-Side-G MOSFET switch. The High-Side-N MOSFET switch is responsible for controlling the main current, while the Low-Side-G MOSFET switch is responsible for controlling the current in the gate-drive circuit.

The MIC28304-1-5V-EV board includes all the components required to develop a complete power supply system. It includes USB connectivity for convenient use and easy connection to a computer. The board also includes a heat-sink, heat-sink mounting bracket and a number of decoupling capacitors.

The MIC28304-1-5V-EV board drastically simplifies the design process of high-frequency switching power supplies. The board contains all the components required to develop a complete power supply system in one package, which eliminates the requirement for external components. The sensitive components are mounted directly onto the board, which makes it easy to make design changes.

The MIC28304-1-5V-EV also has several programmable parameters, such as switching frequency, power limit, start up time and minimum switching duty cycle. It also includes multiple protection features, such as over voltage protection, over current protection, and short circuit protection to prevent damage to the SMPS.

The working principle of the MIC28304-1-5V-EV is based on Pulse Width Modulation (PWM). In a typical SMPS switching circuit, the PWM controller is used to control the voltage and current output. When the current demand increases, the PWM controller increases the duty cycle of the switching pulses, and when the demand decreases, the PWM controller reduces the duty cycle of the switching pulses.

In the MIC28304-1-5V-EV, the MIC28304 PWM controller is the main component which controls the power supply. It uses an adaptive on-time drive to ensure that the switching frequency can remain stable when the input or output voltages are subjected to changes. This helps to maintain the high efficiency of the power supply circuit. Furthermore, the current-sensing and voltage-sensing circuits detect the current and voltage in the system, and can then adjust the switching frequency and the duty cycle to maintain the desired output voltage and current.

In summary, the MIC28304-1-5V-EV is a versatile evaluation board of DC/DC & AC/DC (Off-Line) SMPS, which is ideal for testing and developing designs. It operates with a 5-V input voltage and has a high output voltage accuracy and current output accuracy. The board includes all the components necessary to develop a complete power supply system in one package, drastically simplifying the design process. The MIC28304-1-5V-EV also has several programmable parameters and multiple protection features, to prevent damage to the SMPS.

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