New medical power supply series

The addi­tion of 15V, 19V, 28V, 36V and 48V out­puts and mod­els with an inte­gral fan to the TDK-Lamb­da brand series was announced by the TDK cor­po­ra­tion. Rat­ed at 400W with forced air cool­ing and 250W when con­vec­tion cooled, the fam­i­ly now cov­ers 12 to 48V out­puts. A broad choice of mechan­i­cal con­fig­u­ra­tions is also avail­able, includ­ing open frame ver­sions in the indus­try-stan­dard 3” x 5” footprint.
When con­vec­tion cooled, the pow­er sup­ply has a peak pow­er capa­bil­i­ty of up to 400W. The dura­tion peri­od of that peak is up to 30 min­utes (40°C ambi­ent, 230Vac input) with a max­i­mum duty cycle of 50% — con­sid­er­ably longer than most prod­ucts on the mar­ket. This fea­ture makes it ide­al for med­ical appli­ca­tions with a rel­a­tive­ly low qui­es­cent pow­er con­sump­tion and occa­sion­al peak demand, includ­ing hos­pi­tal beds, den­tal chairs and incubators.
It has an 85 to 264Vac input range and an off-load pow­er con­sump­tion of less than 1.3W, when the out­put is inhib­it­ed. As an option, the units can be fit­ted with a 5V 2A or 12V 1A stand­by volt­age, remote on/off, remote sense, AC fail, and an out­put good signal.
The under­side of the pow­er sup­ply is fit­ted into a ther­mal­ly con­duc­tive, insu­lat­ed plas­tic base (patent pend­ing). This allows heat-gen­er­at­ing pow­er com­po­nents to be con­duc­tion cooled via a cold plate or the sys­tem chas­sis. Oth­er mechan­i­cal con­fig­u­ra­tions include a met­al base­plate, U‑channel, enclosed or inte­gral top-mount­ed fan.
Input to out­put iso­la­tion is 4,000Vac, input to ground iso­la­tion 1,500Vac and the out­put to ground iso­la­tion is 1,500Vac for suit­abil­i­ty in B and BF rat­ed med­ical equip­ment. Leak­age cur­rent is a max­i­mum of 250µA, and the touch cur­rent is less than 100µA. The oper­at­ing, trans­porta­tion and stor­age alti­tude is up to 5,000m, which sup­ports glob­al use and sales of end-equipment.