Peltier on a voltage regulator, TO BE or NOT TO BE

[Demon]

Peltier musings:

I'm looking at ways to cool a LR1084 and tempted to try a tiny peltier sandwich on the front and back of a TO220 VR. I found this guy; 10mmx10mm peltier, TEC1-00703 rated 0.85V 3A:
https://www.aliexpress.com/item/1005007689267535.html

So far I see 2 challenges:

1. Getting a very low voltage power source. The common design I'm seeing is using diodes, but there are comments that they introduce "noise" from the constant clipping action.

...my go-to idea would be to PWM a logic-level MOSFET to get the low voltage.

2. Reducing the current, I don't plan on using the peltier at 100% (3A). According to the datasheet, lowering the voltage brings down the current consumption. I'd just need a source of very low voltage that could "possibly" supply up to 1A (off the top of my head, maybe I need more, maybe I need less).

3. Getting a reliable thermal adhesive since I can't use the screw, and that chinesium thermal tape looks like crap (unless a 3M product from a known supplier is worth it).

4. Learning to count.

Has anyone played with these yet?

[richard]

i would suggest a google of Peltier efficiency before you go down that dead end path. you don't see Peltier's used to cool anything that is above ambient temp for good reasons.
you would need to apply 3w to a typical Peltier device to get 2w of cooling heat transfer that means you now have 5w of heat to dissipate.
The device you linked could never cope with the heat you need to dissipate either.

[amgen]

you have easier options..... 5 volt, 5 amps
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[Ioannis]

Forget peltier.

What are you going to do with the extra heat that peltier will generate? You obviously will need a massive heatsink with fans to get rid of that heat, outside of your case. You can't do that within your enclosure for obvious reasons. Too complicated, too expensive, bad efficiency.

Things are simple. Do not complicate it.

Use either something like the above power supply of a reputable brand, or use bigger aluminum heatsinks. Or design your own SMPS for better control of the quality of the design.

Ioannis

[amgen]

This is an electronic intervention here for you!.....

[Demon]

Duly noted.

Forget about peltier.