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Synqor has launched the InqorGBP IQ72 series of quarter-brick DC-DC converters.

These next-generation, board-mountable, isolated, fixed switching frequency industrial DC-DC converters use synchronous rectification to achieve power conversion efficiencies of up to 91 per cent at full load.

Each module is supplied completely encased to provide protection from harsh environments.

The 42-110V input-voltage range and the selection of output voltages and power levels makes the IQ72 quarter-brick series suitable for a variety of 72V systems, such as industrial automation, locomotive and railway electronics.

The IQ72 series further expands the Inqor family of fully encased and isolated DC/DC converters for industrial and transportation applications.

With an operating temperature range of -40C to +100C, the quarter-brick format is comprised of nine output voltages, including 1.8V, 3.3V, 5V, 7V, 12V, 15V, 24V, 30V and 48V.

Two converters of different power levels are available for each output voltage for a total of 18 models.

These IQ72 series converters provide output power ratings ranging from 58W to 150W.

The converters address many of the UK BRB/RIA12 and French NFF 01-510 railway standards and the EU EN50155 standard requirements of Railways Applications Electronic Equipment Used on Rolling Stock for 72V batteries with no voltage stabilisation.

The series also meets the three main electrical requirements of permanent input voltage, 100ms brownout and one-second transient.

The use of fixed switching frequency technology provides predictable EMI performance, which simplifies filtering design.

The IQ72 series of DC/DC converters provides on/off control referenced to the input side, remote sense for the output voltage and an output voltage trim range of -20 per cent to +10 per cent.

Protection features include input under-voltage lockout, output current limit and short-circuit protection, active back bias limit, output over-voltage protection and thermal shutdown.

All models have at least 3,000VDC, 100M reinforced input-to-output isolation and calculated meantime-between-failure values in excess of 2MHrs.

They are fully 6/6 RoHS compliant.

The IQ72 series is available immediately from stock for evaluation and qualification.

Production quantities are available with eight- to 12-week lead times, depending upon volumes.

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