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DC/DC converter to 6V 40A peak

Other Parts Discussed in Thread: TPS40422

Hi guys and girls,

I'm trying to create a project with 4 servo's but the peak current of the individual servo's can get 8A or more.

Now i would like to do it with a single SMPS to convert the input voltage from a 4c lipo battery to 6V with a peak current of 4*8A + 25% = 40A

I couldn't find any circuit that could realize the following specs:

input: 12,8-16,8V

output: 6V 40A

The cooling is not really a problem because it going in a case that is submerged in water.

tnx for the help