> C1,C2 are 10uF. V1 and V2 are outputs from an H-bridge running at
> 10kHz (12Vp-p, 10A). Direction of current into peltier can be changed
> (V1-V2 and V2-V1) to either heat or cool. Aim of this LC filter is to
> filter output of H-Bridge to less than 10% voltage ripple.

> Murata: 16V,10uF in SMD1210. Dielectric X7R. Tolerance +/-10% and
> change across -55C to 125C +/-15%.

If by 12V p-p you mean the h-bridge can supply +6 or -6 volts across the
peltier, then I'd say you are marginally OK. But if you can get + or -12
volts to the peltier then you should probably have higher voltage caps.

Capacitor data sheets don't represent the type of stress you will put
these to... Ceramic caps are only one step up from electrolytics in terms
of perfection. They really like to have the same polarity all the time, or
else low ripple current. But you are reversing polarity and having high
ripple current.

Cheerful regards,

Bob


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