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isolated DC to DC converter for -5.2V

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ballimo

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dc to dc converter

Hello All,

I am using a optical module that required 5, 3.3 and -5.2V. the current needed at the -5.2 V rail is 4A, I was searching a -5.2V non-isolated DC to DC converter with an output current up to 4A I did not find any because the input voltage to this non-isolated DC to DC converter is 5V (the board have only a single 5 V supply).

I am planning to use an isolated DC to DC converter for the -5.2V, but I don't know how to design this circuit, the only thing I know is to connect the positive to GND.
can anyone help me with this design? if I use this isolated converter the ground of the -5.2V will be different from the module ground (5V, 3.3V...) does this work?
did anyone have some material about this issue?

Thanks,

Ballimo
 

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