Extra wide input quarter-brick DC/DC converters

27th June 2019
Alex Lynn

Powerbox has announced the launch of three new series of extra-wide input voltage range, 40W to 100W board-mounted DC/DC converters for the railway, transportation and defence industries. The converters have an extra wide input voltage range of 14 to 160V and nine to 75V.

The PQAE40U (40W), PQAE60U (60W) and PQAE100U (100W) have been developed to provide systems designers with a single part number that is able to power a large range of applications (e.g. railway, industrial automation and automotive, remote radio-control), thus reducing inventory, time to market and documentation.

Designed for use in harsh environments, the PQAE40/60/100U series meet thermal shock and vibration requirements as specified in EN61373 and MIL-STD-810F, and also meet the fire and smoke EN45545-2 standard.

The PQAE40/60/100U series can be operated from -40 up to +105°C case temperature, meeting the very demanding, ruggedised requirements such as found in construction vehicles, mining equipment and heavy machinery process control.

Industrial and railway power designers often face very demanding challenges to optimise board power solutions when designing standardised equipment for worldwide operation on a very large variety of system bus voltages. 

In the railway industry, designers are permanently seeking the best power architecture to operate within the overall EN50155 input voltage range, from 24V up to 110V, including continuous operation in the 14.4V brownout condition and 154V transients.

To guarantee board power designers the highest level of flexibility, the PQAE40/60/100U series has been developed to deliver full and stable power within an extended input voltage range from 14 up to 160V. For lower bus voltages, the nine to 75V versions cover the main battery voltages, sustaining peak voltage and continuous operation up to 75V.

The PQAE40/60/100U series is available in seven output voltages of five, 12, 15, 24, 28, 48 and 53V, and exhibit an efficiency figure of up to 90%, which considering the extra-wide 12:1 input range, is an outstanding efficiency figure.

All models within the PQAE40/60/100U series feature full protection level sets including over voltage, short-circuit, over load protection, and thermal shutdown. All units operate at a fixed switching frequency and including PI type input filters.

The operating temperature range is from -40 to +105°C baseplate, and storage is from -55 to +125°C.

Designed for ruggedised environments, the PQAE40/60/100U series meet thermal shock and vibration requirements as specified in EN61373 and MIL-STD-810F. All products comply with IEC/UL/EN-60950, EN62368-1 and the railway standards EN50155 and EN45545-2.

The PQAE40/60/100U series are available in an industry standard quarter-brick (36.8x57.9x12.7mm).

All units are housed in a plastic case with an aluminium baseplate and are potted with a UL94-V0 silicon compound.

Four optional heatsinks with different height and airflow orientations are available on request.

The nine to 75VDC modules feature an input to output basic insulation of 2,250VDC and the 14 to 160VDC modules a reinforced insulation of 3,000VAC.

PQAE40/60/100U series converters are RoHS compliant.

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