DC-DC converters optimised for intermediate bus architecture

27 August 2003 Power Electronics / Power Management

Power-One offers three DC-DC converters specifically designed to convert a 36-75 V d.c. input into a fully-regulated 12 V d.c. Intermediate bus architecture (IBA) output for DPA applications. In industry-standard footprints, these bricks offer a comprehensive range of currents: the ¼-brick QBC11ZH, ½-brick HBC25ZH, and full-brick FBC42ZH provide 11, 25, and 42 A, respectively. All products feature low profiles: 11 mm for the ¼ brick and 12,7 mm for the ½ and full bricks.

These products are ideal for powering non-isolated point-of-load converters. Output voltages are tightly regulated over the entire input voltage and output load ranges, greatly reducing the amount of buffer capacitance required on the intermediate bus. High efficiencies, up to 94%, reduce power dissipation and simplify system-level thermal management.

Other features include 1500 V d.c. input-to-output isolation, basic insulation, high capacitive-load capability, wide-output voltage trim, and low conducted and radiated EMI. Protection features include back drive, output overvoltage, output overcurrent, and overtemperature. The converters also offer remote-sense capability, and positive or negative logic primary-referenced remote on/off.

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