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Chip Amps Amplifiers based on integrated circuits

80-100W Class A or AB 24V amp existing ?
80-100W Class A or AB 24V amp existing ?
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Old 17th February 2019, 11:22 AM   #11
FauxFrench is offline FauxFrench  France
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Hi Tanguy,
I included two links in posting #4. The first is to a TDA7498E board that is foreseen for modification into PBTL (mono). This thread describes the modification: 7498E BTL Mode Question
The second link is to a TAS5630 based mono amplifier that is stated to handle 20Vdc-50Vdc.
Perform searches in Google including "diyaudio" if you want to find your way around in this forum.
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Old 17th February 2019, 11:25 AM   #12
Yatsushiro is offline Yatsushiro  France
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Totally OT, but I couldn't let this pass. FF, you have a way with words, whether technical or otherwise:

Quote:
Originally Posted by FauxFrench View Post
One small detail - “twitter" is where energetic politicians tell the world about their talents...
Unfortunately the world now accepts and celebrates politicians mostly talking, rather than doing.
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Old 17th February 2019, 06:57 PM   #13
TanguyClt is offline TanguyClt  France
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You proposed me the TAS5630 DC20 50 v amp,

My bad I didn't see that the output power (600W) was given for 2 Ohms speakers, however I think that even with 36V the output will be higher than 100W for 8 Ohms, witch is too much for me.

Endeed they predict 200W for 8 Ohm with 50V DC so if we divide by 2 it will be 100W with 8 Ohm for 25V DC, so I will be at the limit of my speakers with only the minimum I want to get.
Plus, if I choose this one I will have to deliver a lot of intensity, they endeed said that "the proposed range is the best 24-45V, current 6A or more (the bigger the better)",it is really too much form my battery, even 3A would be too much.

Thanks
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Old 17th February 2019, 08:33 PM   #14
tomchr is offline tomchr  Canada
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Another question to ask is: Why on earth do you need 80-100 W from a boombox? How large batteries are you willing to carry? Or how short runtime are you willing to accept?

Tom
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Old 17th February 2019, 08:47 PM   #15
TanguyClt is offline TanguyClt  France
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Endeed it is a bit excessive, I wanted the greater sound possible no matter what the size of the boombox had to take. I came with these speakers :
-Visaton TW 6 NG, 8 ohm
-FaitalPRO 3FE22
-Monacor SPH-210

I wanted to do it even if I knew that the autonomy was low (bc remember that I will mostly use it on a fix place). My batterry is 2 packs in parallele of 6 18650 li-ion in series.
Actually I expect arround 3 hours as runtime.
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Old 17th February 2019, 11:12 PM   #16
FauxFrench is offline FauxFrench  France
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Quote:
Originally Posted by TanguyClt View Post
You proposed me the TAS5630 DC20 50 v amp,

My bad I didn't see that the output power (600W) was given for 2 Ohms speakers, however I think that even with 36V the output will be higher than 100W for 8 Ohms, witch is too much for me.

Endeed they predict 200W for 8 Ohm with 50V DC so if we divide by 2 it will be 100W with 8 Ohm for 25V DC, so I will be at the limit of my speakers with only the minimum I want to get.
Plus, if I choose this one I will have to deliver a lot of intensity, they endeed said that "the proposed range is the best 24-45V, current 6A or more (the bigger the better)",it is really too much form my battery, even 3A would be too much.

Thanks

Hi Tanguy,

It may not be what you want. Just remember what I wrote before - any BTL coupled class D amplifier gives the same output power with the same supply voltage. Thus, also this amplifier gives 80W in 8 Ohm with 36V supply and 35W i 8 Ohm with 24V supply. The change in output power is not proportional to the supply voltage, it increases with the square of the supply voltage (double supply voltage -> 4 times the output power).

Last edited by FauxFrench; 17th February 2019 at 11:15 PM.
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