| Ductapemaster |
Hi, I'm new to the forum...I'm working on a preamp based around the TI PGA2310 attenuator chip and I need some help with picking out a transformer that will supply sufficient current to power the chip. I have a +/- 15 volt regulator schematic already and I just need the xformer. How much power does the PGA require? My LM317/337's can't supply more than 1.5 amps each so I know I need that much or less from a transformer. Is an amp per rail sufficient? I'm trying to keep my preamp in a 2 inch tall box and I need to use the smallest transformer possible (and toroidal ones are really expensive for the specs I want).
Any suggestions?
Thanks!
-Dan |
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| peufeu |
Read the datasheet ;)
A very small transformer will probably be sufficient. |
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| ifrythings |
| + 100mA would be over kill for that chip. It's idle current isn't even 15mA. |
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| peufeu |
| Yeah the power LED will draw more current than the PGA2310, lol. |
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| Ductapemaster |
Thanks a lot guys. I looked through the datasheet a few times and I didn't see anything like those numbers (except the idle current) but it's probably in there somewhere...
Awesome. This will save me some $$$
-Dan |
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| theAnonymous1 |
Dan,
I have some small dual secondary transformers that would be suitable. They are Zettler Magnetics 44215. You can find them on this page.
You can have a few of them for just the cost of shipping. |
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