QHW075F1

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DC-DC converters are electronic devices that move electrical energy from one supply voltage to another. The QHW075F1 from VICOR is a DC-DC converter module that enables high-speed, constant-voltage conversion in settings from 24V to 48V input. The module allows for a variety of configurations, with high efficiency, high power density, and successful EMI performance.

Features

• VICOR’s Zero-Current-Switching technology provides high-efficiency at light and full-load
• Wide 24 to 48V input range accepts industry VDC buses
• Low input current ripple in all modes of operation
• On/off input control, with over-voltage protection or without for higher efficiency
• Low quiescent current in standby mode
• Optional external trim for precise output voltage setting without using external resistors

Applications

The the QHW075F1 from VICOR is ideal for applications that require high-efficiency, low noise, and high power density. The module can be applied to 24V to 48V input VDC buses and sectors such as telecommunications, power electronics, telecom, renewable energy, electronics systems, and more. The module is suitable for powering systems where the accuracy, reliability, and uniformity of the output voltage is important.

Working Principle

The QHW075F1 operates on the zero-current-switching (ZCS) principle implemented in VICOR’s PWM rectifiers. ZCS eliminates the need for gate drive resistors and primary clamping circuits. This improves power density, reduces thermal load, and increases system efficiency. ZCS reduces input current ripple, removes switching losses, and reduces thermal stress. The module also provides output voltage output trimming for adjusting voltage accuracy without using external resistors.

The module operates in three different modes: continuous, bursty, and bursty-simplified. In continuous mode, the regulator operates in continuous draw mode and provides improved transient response. In bursty mode, the regulator operates in constant-voltage mode, providing better noise performance. In bursty-simplified mode, the regulator operates in constant-voltage on/off mode, providing the highest efficiency.

Conclusion

The QHW075F1 from VICOR is a DC-DC converter module that enables high-efficiency, low noise, and high power density in a wide range of applications. The module features Zero-Current-Switching technology that provides high-efficiency at light and full-load and features a wide 24 to 48V input range, low input current ripple in all modes of operation, on/off input control, and optional external trim for precise output voltage operation. The QHW075F1 is suitable for powering systems where the accuracy, reliability, and uniformity of the output voltage is essential.

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