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-   -   Infineon MA12070 Class D (https://www.diyaudio.com/forums/class-d/347422-infineon-ma12070-class.html)

xrk971 1st January 2020 08:03 PM

Infineon MA12070 Class D
 
1 Attachment(s)
Just saw this new amp IC being used in the SMSL SA300. The specs look impressive. 45uV noise with audio source off. 0.004% THD at higher power (not sure what power but not max). Max power in the usual 40w range for 24v supplies. Built in I2C serial data bus for DSP programming and basic controls.

https://www.infineon.com/export/site...1634788313.jpg

Features from website:
Quote:

Summary of Features

https://www.diyaudio.com/forums/atta...1&d=1577909587

Multi-level switching technology with 3-level and 5-level modulation
2×80W peak output power (26V PVDD, RL = 4Ω, 10% THD+N level)
Supply voltages: +4V to +26V (PVDD) and +5V (A/DVDD)
Suitable for 2.0, 2.1, 4.0, 1.0 output stage configurations
4th order feedback error control
<160mW Idle power dissipation (26V PVDD, all channels switching)
>80% efficiency at 2W power (1kHz sine, 8Ω)
>91% efficiency at full Power (1kHz sine, 8Ω)
Audio performance (PMP2): >110dB SNR (A-w, rel. to 1% THD+N power level)
45µV output integrated noise (A-w)
0.004% THD+N at high output levels
I2C control (four selectable addresses)
Built-in protection: under-voltage-lockout, over-temperature warning/error, short-circuit/overload protection, power stage pin-to-pin short-circuit, error-reporting through serial interface (I2C), DC protection

MA12070 - Infineon Technologies

https://www.infineon.com/dgdl/Infine...64b750002861a5

Uses the so-called Multilevel Class D topology for the highest power efficiency, greater than traditional Class D - whitepaper:
https://www.infineon.com/dgdl/Infine...69b4f8f7524db9

Applications:
https://www.infineon.com/dgdl/Infine...67bba4f4e81abd

The SMSL SA300 which has got to be the highest feature packed per dollar DAC/amp I have seen.

If anyone has experience with this new chip please share. Getting the SA300 is less expensive than getting the Eval board from Infineon.

Is this the new “TPA3116 Juggernaut” of the 2020 decade?

FauxFrench 1st January 2020 09:08 PM

Looks interesting with impressive specs but for DIY a horror to solder.

xrk971 1st January 2020 10:08 PM

Must use solder paste and hot plate and skillet. Or preferably, hot plate on bottom and hot air pencil on top. The pads are self-aligning via surface tension of molten solder when liquidus. Many state of the art parts are now in this format, so we as DIY'ers, are going to have to expand our repertoire of construction to match if we want to play with state of the art parts. It is not that hard really. Watch some videos on YouTube, get solder paste in syringe, get a $10 hot plate and an old frypan.

QFN64 with thermal pad down package looks like this on bottom side:
https://www.mouser.com/images/mouser...FN_64_EP_t.jpg

Reactance 1st January 2020 10:27 PM

Quote:

Originally Posted by FauxFrench (https://www.diyaudio.com/forums/class-d/347422-infineon-ma12070-class-post6028639.html#post6028639)
Looks interesting with impressive specs but for DIY a horror to solder.

drag solder, lots of flux and a usb microscope. something any DIY modern workshop should have.

FauxFrench 1st January 2020 10:53 PM

I have managed with the fine soldering iron tip to let a solder-drop run along the sides and remove any excessive solder that way. Leads on 4 sides I still find difficult to handle with traditional soldering gear. OK, this is a chip that is not meant to be used with a heatsink. Once on the board, it is not meant to leave again.
My main irritation is chips like TDA7498E with very tiny leads. The TDA7498E anyway needs a solid heatsink on top so why not use an SMT chip housing like for TDA8932 or TDA8954 that is somewhat bigger but much easier to handle.

irribeo 1st January 2020 11:26 PM

1 Attachment(s)
Quote:

Originally Posted by xrk971 (https://www.diyaudio.com/forums/class-d/347422-infineon-ma12070-class-post6028729.html#post6028729)
Must use solder paste and hot plate and skillet. Or preferably, hot plate on bottom and hot air pencil on top. The pads are self-aligning via surface tension of molten solder when liquidus. Many state of the art parts are now in this format, so we as DIY'ers, are going to have to expand our repertoire of construction to match if we want to play with state of the art parts. It is not that hard really. Watch some videos on YouTube, get solder paste in syringe, get a $10 hot plate and an old frypan.

QFN64 with thermal pad down package looks like this on bottom side:
https://www.mouser.com/images/mouser...FN_64_EP_t.jpg

ok as attachment the size seems near real size, tiny, will have to wait for mini ampboards

KaffiMann 2nd January 2020 08:04 AM

It seems the output stages PMP0 and PMP3 have more noise around 6khz, the figures for PMP1 and PMP2 are much better.
Further down in the BTL sections you see the numbers on PMP1 are also starting to look better than PMP2.
I would expect about 20 decent quality watts in 8ohms/BTL 26V.

Page 38 onwards for 8ohms 26v BTL, page 53 onwards for 8ohms 24v BTL.
https://www.infineon.com/dgdl/Infine...64b750002861a5

No SQ competition for TPA3250/TPA3251 IMO, but a very good start. Better than TPA3118?
Seems a little bit easier to DIY perhaps.

lithoc 2nd January 2020 08:27 AM

Imho, this chip is impressive for battery operated as it's a very efficient chip.

If looking for powerful chip and not battery operated ,I will stick with TPA3255

Unfortunately , we have have to wait for TPA3126 or TPA3156 to compare with since it's consider newer generation / improved design

xrk971 2nd January 2020 09:44 AM

Quote:

If looking for powerful chip and not battery operated ,I will stick with TPA3255
Depends on what battery, I can run 7hrs at 100wrms with a couple of big gel cells and DC-DC step up. Here is my 3255:
https://www.diyaudio.com/forums/atta...ic-caps-01-jpg

KaffiMann 2nd January 2020 01:26 PM

Quote:

Originally Posted by lithoc (https://www.diyaudio.com/forums/class-d/347422-infineon-ma12070-class-post6029183.html#post6029183)
Imho, this chip is impressive for battery operated as it's a very efficient chip.

If looking for powerful chip and not battery operated ,I will stick with TPA3255

Unfortunately , we have have to wait for TPA3126 or TPA3156 to compare with since it's consider newer generation / improved design

I would actually prefer the TPA3251 to any of these low-ish power chips (3116, 3118, 3126, 3156 etc), even the TPA3250 (the TPA3250 is a really good one, but it's not quite so versatile and very slightly worse noise figures).

TPA3251 - Good noise figures, works from 12-36vdc (38v max!), can be asked to give about 50 watts very clean power in 8 ohm.

The TPA3255 is the top dog in the right conditions, but I think the TPA3251 is a better "all rounder" all things considered.
Would like to see a 2 x TAS3251 implementation in one board, 4 channels BTL, DSP filters and EQ, and one of those "HD bluetooth" receivers.
Not better, only less clutter.


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