The PKM7200W series has a wide input range of 16 to 160V (185V/second), which is suitable for rail applications around the world, says the company. Modules provide 150W continuous output power and 12, 24 or 54V DC fully regulated single outputs in a 62 x 40 x 13mm (2.44 x 1.57 x 0.51 inch) case. Efficiency is up to 89% and the modules feature 4kV DC isolation, meeting the requirements of EN 50155 for rail, as well as IEC/EN/UL 62368-1 for IT and audio/visual applications.  

The PKM7200W series has a VBUS pin. This input-referenced connection is boosted to around 100V, irrespective of the input voltage. This can be used to charge a user-supplied capacitor which the DC/DC switches in when the input power is interrupted. This feature enables long hold-up time with a relatively small capacitor, to meet the 10 to 30ms requirements of the rail standard EN 50155.

The products comply with the rail fire safety standard EN 45545-2 and have been qualified to EN 61373 and the IEC 60068 series of standards for environmental testing. EN 50121-3-2 for EMC in rail applications is met, as well as EN 55011 and the EN 61000-4 series of standards for EM immunity. EMI conducted emissions meet EN 55032, CISPR 32 and FCC part 15J ‘Class B’ with an external filter.

The PKM7200W series operates from -40 to 100°C baseplate temperature with derating, depending on attached heatsink and airflow. Typically, the parts provide full load with a 20mm attached quarter brick heatsink up to 60°C ambient air temperature in natural convection and to around 90°C with 3m/s airflow.

There is also programmable input under-voltage lockout, remote control, output trim and remote sensing. Comprehensive protection includes over-temperature, and output short-circuit, over-voltage and over-current.