Communications Power

Isolated 3W D2Ds Reduce Board Space in Industrial Applications

CUI Inc. announced two isolated dc-dc converter families for industrial, test and measurement, and telecommunication applications. The rugged and compact PQMC3-S and PQM3-M families increase total efficiency across the entire load curve and give improved performance at light and no loads. The converters are suited for battery-powered applications where power draw under these conditions are a concern. Rated at 3 Watts, the PQMC3-S Series is available with input ranges of 4.5- to 9-Vdc, 9- to 18-Vdc, 18- to 36-Vdc, and 36- to 75-Vdc while the PQM3-M Series offers input ranges of 9- to 18-Vdc, 18-to 36Vdc, and 36- to 75-Vdc.

Both families come equipped with an operating temperature range of -40 to + 85 degrees C at 100% load, allowing the dc-dc converters to work reliably in harsh environments. The PQMC3-S Series is housed in a compact 8 pin SIP package measuring 0.86″ x 0.37″ x 0.47″ (22 mm x 9.5 mm x 12 mm) and the PQM3-M series is housed in a 16 pin SMT package measuring 0.94″ x 0.54″ x 0.30″ (23.86 mm x 13.70 mm x 7.50).

Both families are available in single output voltages of 5-, 12-, or 15-Vdc while the SIP version PQMC3-S is also available in dual output voltages of ±5-, ±12-, or ±15-Vdc. Outputs are fully regulated to within ±0.2% (typical) for all line and load conditions. Input to output isolation of 1,500 Vdc is provided across the range of models.

Protections include continuous short circuit and over current. The dc-dc converters meet CISPR22/EN55022 Class B standards with limited external components. The PQMC3-S and PQM3-M Series are available now through distribution starting at $11.42 for 100 pieces.

CUI Inc.
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