VI-21H-MW-B1

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DC DC Converters

DC-DC converters are widely used to provide isolated and regulated DC power supplies. The VI-21H-MW-B1 is designed with a high efficiency, high power density, up to 900W, and low cost that make it the ideal solution for a variety of applications.

Application Fields

The VI-21H-MW-B1 is capable of operating from 9~36Vdc input with up to 900W of power. It is an ideal solution for motor control, lighting systems, security systems, and other applications where high efficiency and a wide range of operation are essential. It can be used in industrial, automotive, medical, telecommunications, and other harsh environments.

The VI-21H-MW-B1 is also a suitable choice for applications such as automotive lighting, ignition systems, airbag control systems, alternator control systems, and other systems that require isolated regulated DC power.

Working Principle

The VI-21H-MW-B1 is a voltage-mode based isolated DC-DC converter. It employs a pair of power MOSFETs in a full-bridge configuration to convert an unregulated higher voltage DC input to a lower voltage DC output. The operating frequency of the converter is set by an integrated oscillator connected to the control section of the bridge. The control section manages the current flow within the circuit by utilizing an inner loop current controller and an external voltage reference.

The input voltage is first fed into the transformer, where it is stepped down, and then applied to the bridge. The bridge is then driven by the voltage controllers, which keeps the output voltage at the desired level, and the current through the MOSFETs is automatically adjusted according to the external voltage reference. The output voltage is then filtered and regulated by the output filter and protection circuit.

The VI-21H-MW-B1 also includes a number of protection features such as over-voltage, over-current, and short-circuit protection. This protects the device from being damaged due to unforeseen conditions such as a sudden surge in current or a voltage spike. The device also provides a number of Soft Start features that allow the device to ramp up the output voltage in a smoother and more controlled fashion.

The VI-21H-MW-B1 can be used in a wide range of applications, and its high efficiency rating makes it an ideal choice for power conversion applications. It is designed to be very reliable, durable, and cost effective, making it an excellent choice for both commercial and industrial applications.

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