I have a DC-DC converter (input rating 9-36V/5.9A and output 12V/3.4A). I am supplying power to this DC-DC converter using a power supply rated (12V/10A).
This power supplied by this DC-DC converter (12V) is then relayed on three 24AWG conductors (max current capacity of 577mA).
What should be the rating of the fuse which I should be placing at the input of the DC-DC convertor?
Help or suggestions would be greatly appreciated.
Cheers,
Shri.
6.8 A fuse at the input would be sufficient for performing the protection function such that the coordination is preserved.
Dear researcher
the amount of fuse value completely is in relationship with your load. For example if your load value is small (high current will be on that), so because of high value of current on load this strongly effect on input current. For example for a conventional boost converter(Iin=Io/(1-d)). It means for duty cycle=0.5 for 1A for load current you will have 2A as input current. So you should consider the maximum value of load current and calculate your input current accordingly and then put a fuse with a bit haigher that your input current.
Sincerely
It is recommended to refer to the relevant standard such as the IEC for proper selection of fuses, and other protective devices.
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