SynQor's new IQ64 family of half brick DC/DC converters features a super-wide 8:1 input voltage range of 18 to 135V. With one converter, designers can simultaneously satisfy EN50155 requirements for 36V, 48V and 72V railway systems. The IQ64 family uses the company's patented two-stage topology with a constant mid-bus voltage, which enables an optimised isolation stage design based on synchronous rectifiers, reducing heat loss and achieving high efficiency at full load.
The new series expands the InQor family of fully encased and ruggedised isolated DC/DC converters for industrial and transportation applications. The half-brick format is comprised of nine output voltages, including 1.8V, 3.3V, 5V, 12V, 15V, 24V, 28V, 40V and 48V. For each output voltage there are two converters: one with a power rating in the 200W range, and a second cost-optimised unit in the 150W range for lower power requirements.
The range of output voltages and power levels makes the new series suitable for a variety of 24V, 36V, 48V and 72V systems, such as industrial automation, locomotive and railway electronics. The versatile IQ64 series also addresses many of the UK RIA12 and French NFF 01-510 railway standards. The use of fixed switching frequency technology provides predictable EMI performance which simplifies filtering design.
The converters provide on/off control referenced to input side, remote sense for the output voltage and an output voltage trim range of -20%, +10%. Protection features include input under-voltage lockout, input over-voltage shutdown, output current limit and short circuit protection, active back bias limit, output over-voltage protection and thermal shutdown. All models have at least 2250V DC isolation rating between input and output, have calculated MTBF values in excess of 2MHrs, and are fully 6/6 RoHS compliant.
