PYQ50 and PYQ75 DC/DC converters have wide input range for industry and rail

Two series of DC/DC converters by TDK-Lambda have wide input ranges. The PYQ50 and PYQ75 30 to 75W DC/DC converters are packaged in the industry standard, quarter brick format measuring 57.9 x 36.8 x 12.7mm. The PYQ50 has 30 to 50W output and features a 12:1 input range of 14 to 160V DC. The PYQ75 has a 75W output and 8:1 input of 9.0 to 75V DC. 

They are silicone potted for shock and vibration resistance. They are suitable for applications according to EN 50155 for electronic equipment on railway rolling stock vehicles. They can also be used for industrial and measurement equipment which requires battery back up or a DC source.

The PYQ50 series includes a choice of four nominal outputs, 5.0, 12, 24 and 48V while the PYQ75 has 5.0, 12, 15, 24, 28 and 48V options. The DC/DC converters are adjustable over a -20 to +15 per cent range for non-standard voltages. 

All models have over-current, output over-voltage and over-temperature protection and standard functions such as remote sense and remote on/off. Efficiencies are up to 90 per cent. The DC/DC converters can operate with an ambient air temperature of up to -40 to +105 degrees C or +100 degrees C for the PYQ50 series. Optional heatsinks for convection cooling, forced air cooling are available, or the modules can be conduction-cooled using a cold-plate.

Input to output isolation for the PYQ50 is 3000V DC input to output, 2500V DC input to baseplate and the output to baseplate is 500V AC. The PYQ75 has 3000V AC input to output, 2100V AC for input to baseplate, and 1500V AC for output to baseplate. 

All models are certified to the IEC/UL/CSA/EN 62368-1 safety standards with the CE and UKCA marks for the Low Voltage and RoHS Directives. 

The PYQ, in combination with a typical test setup, has been tested to meet the EN 50155, EN 45545-2, EN 61373, and EN 50121-3-2 railway standards.

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