multiple voltage regulators on same hatsink ?????

- M
- mark krawczuk
  
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posted
15 years ago

Fri, Oct 31, 2008 2:49 PM

hi, i`m making up a power supply , with four 78 XX series regulators and lm317 adjustable reg.

is it ok to bolt all these on the same heatsink without insulating washers ?

thanks, mark k

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- C
- cassiope
  
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posted
15 years ago

Fri, Oct 31, 2008 3:02 PM

egulators

NO!

- L
- Lostgallifreyan
  
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posted
15 years ago

Fri, Oct 31, 2008 3:39 PM

"mark krawczuk" wrote in news:-5CdnXf6U-

5uh5bUnZ2dnUVZ snipped-for-privacy@adnap.net.au:

It's probably ok with the 78xx types, if they all ground to the same place because GND is on the tab and centre pin. Mount the LM317 on insulators though. If in ANY doubt about the chassis potential, insulate all devices.

- E
- Eeyore
  
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posted
15 years ago

Sat, Nov 1, 2008 2:02 AM

NO.

Graham

- E
- Eeyore
  
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posted
15 years ago

Sat, Nov 1, 2008 2:03 AM

Just be careful about where currents flow to and from.

Graham

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