EMRFD Message Archive 2171

Message Date From Subject
2171 2008-10-03 09:29:20 timshoppa TDA1013B
Others here have talked about, and I've succesfully used, TDA7052A's
as speaker amplifiers in homebrew receivers.

But it has one little feature that bothered me: it has a "BTL"
output stage, which means that neither side of the speaker is
grounded. That's actually not a bug, it's a feature, to most folks,
because you get more available power. But accidentally ground one
side of the amp and funny things happen. The TDA7052A is also
optimized for 6V use, and while it works fine on 12V or 13.8V it
doesn't seem perfect.

Last night, an order came in from Digikey, and it had a TDA1013B in
it that I wanted to try. Within ten minutes I had ripped the
TDA7052A out of my homebrew MX and subbed in the TDA1013B. The
TDA1013B is intended for 12V/13.8V supplies. It has a different (and
IMHO more sensible) DC control voltage range. It is not BTL output.
Meaning that one speaker lead is grounded, and the other has an
electrolytic capacitor. And it has more power (2W at exquisitely low
distortion, 4W at 10% distortion) available than the TDA7052A which
had a lot more than a LM386.

So, if you've got 12V available, I think the TDA1013B is to be
2175 2008-10-03 19:25:09 jr_dakota Re: TDA1013B
You can bridge about any of the audio amp IC's (Unless it's already a
bridge circuit like the TDA7052), it's a good way to get twice the
power from the same voltage ... This was popular in the first car
audio "booster" amps where you were limited to working with 12VDC
before everyone went to DC-DC converters to get higher voltages, the
LM383/TDA2002 was used in a bridge in those old Audiovox and other

One nice thing about a Bridge (BTL) circuit is as you noted neither
speaker lead is tied to ground so you don't have those output currents
introducing noise into the circuit ground


2179 2008-10-04 01:23:43 cwfingertalker Re: TDA1013B

Thanks for the review on the TDA1013B. I will check that chip out and
maybe consider it in future projects. Good information.

Bill N7EU