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Q factor of LC filter for TEC driver
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ogden:

--- Quote from: Kleinstein on April 26, 2019, 08:12:24 pm ---At 5 A 33 µH is already a lot.

--- End quote ---

Good point. When you have enough money to buy inductor - you better build current-regulated buck converter to power TEC. Obviously at higher than 40KHz, frequency.
Gibson486:
I thought about using a switcher to control this, but all the circuits I saw for this look huge. Granted, I did a search with Texas instruments power supply configurator.
ogden:

--- Quote from: Gibson486 on April 26, 2019, 09:52:33 pm ---I thought about using a switcher to control this, but all the circuits I saw for this look huge.

--- End quote ---

In what sense they look huge? Some regulators are not much bigger than mosfet transistor+driver needed for PWM. Just an example:

Gibson486:
I just looked at the amount of components and the area spec it gives. Perhaps they do a bad at conveying this?

Edit.....my tec is 24V and my supply is 24V....
T3sl4co1l:
If you forgot to include the area of your existing filter, it may look overly significant... :)

Tim
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