ADP2105-BL1-EVZ

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The ADP2105-BL1-EVZ Evaluation Board is an off-line switching mode power supply (SMPS) module with a wide range of applications covering both DC/DC and AC/DC power conversion. It is designed to provide users with a platform to easily evaluate different power supply design parameters, such as power levels, load current and efficiency. The Evaluation Board has a peak output power of 2W, a minimum voltage of 4V, and a maximum critical output current of 5A. The ADP2105-BL1-EVZ Evaluation Board also features an adjustable operating frequency, which allows users to experiment with different switching frequencies to optimize efficiency and reduce noise.

The working principle of the ADP2105-BL1-EVZ Evaluation Board depends on the synchronous rectification technique. The device uses a regulating oscillator to generate pulses to drive a pair of MOSFETs in an interleaving circuit. The MOSFETs are then switched on and off in synchronization with the input voltage, maintaining a consistent peak current flowing through the inductor. The inductor stores the energy in the form of a magnetic field and the energy is transferred to the output capacitor, which delivers the smoothened output voltage.

In order to obtain the maximum efficiency from the ADP2105-BL1-EVZ Evaluation Board, it is important to choose an appropriate diode for the output current. The diode should be selected based on the circuit requirements, such as the peak output current, minimum pulse width, maximum voltage and correct current transfer ratio. The power diode should also be chosen carefully in order to minimize the voltage drop across the diode and to ensure the circuit operates stably.

The ADP2105-BL1-EVZ Evaluation Board also features an over-current protection (OCP) circuit with an adjustable current limit. This circuit can be used to protect the board from excessive current, in case the output current exceeds the set limit. The OCP circuit uses a resistor connected in parallel to the output train, to detect the output current. When the output current exceeds the set limit, the OCP circuit will be triggered, which will interrupt the device and disable the output voltage.

Overall, the ADP2105-BL1-EVZ Evaluation Board is an ideal solution for both DC/DC and AC/DC power conversion. It provides excellent efficiency and offers excellent protection against excessive current. The adjustable operating frequency provides users with the flexibility to experiment with different switching frequencies to optimize efficiency and reduce noise.

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