Other Parts Discussed in Thread: SN6505B, AMC1400
Tool/software:
Hi,
I am interesting in using the AMC1411 in an application where a working voltage of 2200 VDC is applied continuously across the isolation barrier. This just falls within the spec of the device, which has a maximum isolation working voltage of 2260 VDC. The issue I am running into is that finding a DC-DC converter that is rated for a continuous working voltage of 2200 VDC to power the AMC1411. So far, I have identified two potential approaches. One approach is to buy an off the shelf galvanically isolated DC-DC converter, such as the RHV2-0505S/R20 from Recom Power. While the isolation voltage rating is 20kV (tested for 1 second), the working voltage for continuous operation is only 1400 Vrms. If I assume that the equivalent DC working voltage rating corresponds to the peak voltage of an AC sinusoidal waveform, then the working voltage is 1400 VRMS *sqrt (2) = 1980 VPK. While this is close to my requirement of 2200 VDC, it does not meet it. The other approach is to design my own isolated DC-DC converter with a transformer driver such as the TI SN6505B, such as in the typical application circuit in the datasheet for the AMC1400:
This approach would then require a transformer with continuous working voltage voltage rating of 2200 VDC. So far, I have not been able to find a transformer that has a suitable working voltage rating. Does anyone have a suggestion for powering the AMC1411 in a way that is rated for 2200 VDC continuously across the isolation barrier. So far, the only idea I have had is to put two DC-DC converters in series so that each only has 1100 VDC across it.
