VI-25B-CV-S

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DC-DC converters are commonly used in a variety of applications for providing power from DC sources to DC loads. The VI-25B-CV-S is a family ofDC-DC converter modules from Vicor Corporation. The VI-25B-CV-S converter has a nominal input voltage from 24 - 28VDC and a nominal output voltage from 1.8 - 24Vdc. It is designed for applications requiring power conversion of greater than 2 Watts and up to 25 Watts in 2x2 inch package.

The VI-25B-CV-S converter is designed to operate with minimum output ripple and high power factor while meeting EN61000-3-2 harmonic current limitations. The device also features a comprehensive input protection function, as well as under-voltage and over-voltage lockout. Additional features include soft start, built-in EMI filtering and energy efficiency above 90%.

VI-25B-CV-S converters are used in a wide range of applications, such as powering industrial automation equipment, portable medical devices, and photovoltaic solar systems. The device is ideal for applications requiring high performance power conversion in limited space.

VI-25B-CV-S converters use an interleaved bridgeless PFC converter topology with universal AC input. This topology uses two full bridges, two diodes and two inductors, and a fixed frequency control to achieve active power factor correction. The full bridges are connected back-to-back with the AC line voltage, allowing the current drawn from each half to be cancelled out, resulting in a low THD and high power factor. The diodes and inductors are used to rectify and store the DC energy while the MOSFET switches regulate the output voltage.

The switching frequency of the VI-25B-CV-S converter can be adjusted via an external resistor to meet harmonic current and other application requirements. The power supply also utilizes advanced digital control amps to maintain stability and precision control of the output voltage. The digital control also allows for soft start and output over-voltage protection. The VI-25B-CV-S uses intelligent digital FIR filters to reduce EMI noise from the output.

The VI-25B-CV-S DC-DC converter series from Vicor Corporation is ideal for applications requiring efficient and reliable high power conversion in space-limited designs. The comprehensive protection and high efficiency of the device make it well-suited to a wide range of applications, from medical to industrial.

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