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Old 4th September 2014, 06:24 PM   #1
Ensoniq is offline Ensoniq  United States
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Default Minimal power supply for tpa3116d2

I'm making 3 channel (2 ICs) amp (~20w x2, 40w).
I wanna built simplest/ cheapest power supply for it, without toroidal transformer. But not too cheap that it will make the amp noisy or anything
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Old 4th September 2014, 06:58 PM   #2
rayma is offline rayma  United States
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Quote:
Originally Posted by Ensoniq View Post
I'm making 3 channel (2 ICs) amp (~20w x2, 40w).
I wanna built simplest/ cheapest power supply for it, without toroidal transformer. But not too cheap that it will make the amp noisy or anything
The PS rejection is 60-70dB, and it needs only a single supply, so maybe a single 35A 100V bridge rectifier and a 22,000uF 35V cap will do.
The 75VA or larger transformer needs a 15VAC winding with a 5A secondary. Use a 5A slow blow fuse on the input.

http://www.mouser.com/ProductDetail/...enpPUkEqNXI%3d

http://www.mouser.com/ProductDetail/...oSXR2hvvc9Iw==

http://www.mouser.com/ProductDetail/...HCgoEm5oZfeg==

Last edited by rayma; 4th September 2014 at 07:15 PM.
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Old 4th September 2014, 07:31 PM   #3
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take an ac-dc adapter from an old laptop or printer - they deliver a stable dc voltage and are SECURE. I would not endorse DIY-AC-Adapters for safety reasons.
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