This is a new class D two channel integrated switch IC from infineon, doesn't seem to be available with distributors yet. Its an improvement over previous IC's like the IR4301. Its particularly exciting for me as it has the following features:
Datasheet:
MA5332MS - Infineon Technologies
Single supply reference design:
REF_MA5332BTLSPS - Infineon Technologies
I have contacted Infineon to fix the illegible schematic in the manual however they refused, claiming "Unfortunately, this is only what is available at the moment.". Apparently if you register the dev board there are additional documents available however as you can't buy this board yet this may be somewhat difficult.
Simulation BTL implementation:
Infineon Designer powered by TinaCloud
Conventional split supply reference design:
EVAL_AUDAMP25 - Infineon Technologies
Power output in the datasheet is rated upto:
RL= 8ohms, 10%THD+N, Vbus = ± 36.5 V 400 W
My suspicion is that more is possible using a higher supply voltage, better thermal management in the PCB and perhaps an output inductor with a higher saturation current. The inductors listed in the audamp25/ref_ma5332btlsps reference designs saturate around 15A.
Infineon don't make very good datasheets compared to companies like TI. I found the documentation for the IRS2092 useful when working with their integrated ICs as it's the same modulator:
IRS2092SPBF - Infineon Technologies
particularly "IRS2092 and IRS2092S Functional Description".
I also found these app notes useful:
https://www.infineon.com/dgdl/Infin...N.pdf?fileId=5546d46258fc0bc101598b13dd7d2d56
https://www.infineon.com/dgdl/Infin...N.pdf?fileId=5546d462533600a40153559b1bcc115c
https://www.infineon.com/dgdl/an-1164.pdf?fileId=5546d462533600a40153559a9bd31120
Here is a thread on the previous generation IR4301:
IR4301
- 100V breakdown voltage, increased from 80V in IR4301
- FET rdson typical = 24.4mohm, reduced from 39mohm in IR4301
- Single supply bridged operation possible using a single IC
- FET current limit increased from 17A (ir4301) to 40A
- built in clip comparator!
- low idle power consumption (only a few 10's mA quiescent)
Datasheet:
MA5332MS - Infineon Technologies
Single supply reference design:
REF_MA5332BTLSPS - Infineon Technologies
I have contacted Infineon to fix the illegible schematic in the manual however they refused, claiming "Unfortunately, this is only what is available at the moment.". Apparently if you register the dev board there are additional documents available however as you can't buy this board yet this may be somewhat difficult.
Simulation BTL implementation:
Infineon Designer powered by TinaCloud
Conventional split supply reference design:
EVAL_AUDAMP25 - Infineon Technologies
Power output in the datasheet is rated upto:
RL= 8ohms, 10%THD+N, Vbus = ± 36.5 V 400 W
My suspicion is that more is possible using a higher supply voltage, better thermal management in the PCB and perhaps an output inductor with a higher saturation current. The inductors listed in the audamp25/ref_ma5332btlsps reference designs saturate around 15A.
Infineon don't make very good datasheets compared to companies like TI. I found the documentation for the IRS2092 useful when working with their integrated ICs as it's the same modulator:
IRS2092SPBF - Infineon Technologies
particularly "IRS2092 and IRS2092S Functional Description".
I also found these app notes useful:
https://www.infineon.com/dgdl/Infin...N.pdf?fileId=5546d46258fc0bc101598b13dd7d2d56
https://www.infineon.com/dgdl/Infin...N.pdf?fileId=5546d462533600a40153559b1bcc115c
https://www.infineon.com/dgdl/an-1164.pdf?fileId=5546d462533600a40153559a9bd31120
Here is a thread on the previous generation IR4301:
IR4301
Last edited:
Yes battery powered operation from single supply is my primary motivation as well. I have a prototype using IR4301 I have been working on but this will be considerably neater and lower cost. I need 8 amp channels to run my PA comfortably. My Battery is a 16S Lithium Ion so around 64V.
Looking at the REF_MA5332BTLSPS the method of setting the DC bias of the output to mid supply doesn't seem suitable for applications where the supply voltage varies. Instead of the attached design I would create a mid supply reference voltage and supply V+in with that and delete RDCIN. I guess the Reference board uses the attached arrangement to reduce component count.
Looking at the REF_MA5332BTLSPS the method of setting the DC bias of the output to mid supply doesn't seem suitable for applications where the supply voltage varies. Instead of the attached design I would create a mid supply reference voltage and supply V+in with that and delete RDCIN. I guess the Reference board uses the attached arrangement to reduce component count.
Attachments
Should be possible to implement post filter feedback on this IC using the information from the systemd-liteamp thread. I read the whole thread and think the following posts are the most important:
System_D_MD thead has a reference list for reading about class-D amplifiers and tutorial information:
System_D_MD, Class D is like chocolate
Control loop diagram
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp.html#post3899546
Some discussion on minimising noise from IRS2092:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp.html#post3903873
Analog equivlent model of control loop and more hints on loop:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-2.html#post3911111
Gommer LTSPICE model:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-6.html#post3946346
More details on spice model (another thread):
https://www.diyaudio.com/forums/class-d/120100-irs2092-customizable.html#post1469185
Schematic of finished amp with post filter feedback:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-23.html#post4204292
Chocoholic simulation of systemD_Lite amp:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-29.html#post4342759
Higher res schematic:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-37.html#post4394842
Averaged AC model (LTSPICE):
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-42.html#post4468957
Updated info posts (schematics/sims):
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-49.html#post4780702
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-50.html#post4780710
Some simulation hints on stability:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-62.html#post5036172
There was also some talk about using the IR4301 in the systemd-liteamp schematic on that thread so I'm presuming designs are almost directly applicable without looking at it in more detail.
System_D_MD thead has a reference list for reading about class-D amplifiers and tutorial information:
System_D_MD, Class D is like chocolate
Control loop diagram
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp.html#post3899546
Some discussion on minimising noise from IRS2092:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp.html#post3903873
Analog equivlent model of control loop and more hints on loop:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-2.html#post3911111
Gommer LTSPICE model:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-6.html#post3946346
More details on spice model (another thread):
https://www.diyaudio.com/forums/class-d/120100-irs2092-customizable.html#post1469185
Schematic of finished amp with post filter feedback:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-23.html#post4204292
Chocoholic simulation of systemD_Lite amp:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-29.html#post4342759
Higher res schematic:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-37.html#post4394842
Averaged AC model (LTSPICE):
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-42.html#post4468957
Updated info posts (schematics/sims):
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-49.html#post4780702
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-50.html#post4780710
Some simulation hints on stability:
https://www.diyaudio.com/forums/class-d/255046-systemd-liteamp-62.html#post5036172
There was also some talk about using the IR4301 in the systemd-liteamp schematic on that thread so I'm presuming designs are almost directly applicable without looking at it in more detail.
Not only is post filter feedback possible, as the feedback path isn't integrated to the IC, but adding an integrator, a la Ncore, should also be possible too. Theoretically adding an integrator to the TPA325x is possible but the single supply operation makes it a little more involved. The split supply of this chip helping to simplify things. Not only that but the integrated clip indicator makes for an easy way of deactivating the integrator during moments of instability.
Mouser now has stock listed as arriving 15/02/2022: https://www.mouser.co.uk/ProductDet...=sGAEpiMZZMv0NwlthflBi26gG3DmJC3WDOLFOewA6fc=
Hello,
Through two month, my new board with MA5332 almost finished debug, and it will comming soon. I think MA5332 is a very nice amplifier.
Attachments
Looking good. What type of amplifier is this? single channel? stereo? single supply? split supply? voltage rails? number of board layers?
Great great...
Michel Xiao's amplifier board is available!
https://fr.aliexpress.com/item/1005...416659069233076360e3a3d!12000030614120619!rec
I can't wait to try it!!! It still lacks a lot of info on the possibilities and wiring of this card.
Michel Xiao's amplifier board is available!
https://fr.aliexpress.com/item/1005...416659069233076360e3a3d!12000030614120619!rec
I can't wait to try it!!! It still lacks a lot of info on the possibilities and wiring of this card.
Card received today!
It seems really good quality.
Go hop, I connect it quickly...
Balanced 36v power supply, 8 ohm test speaker.
Well I'm very surprised by the power of this tiny chip...7 mm *7.
The quality of sound and power seems to be stunning!
The inductors are of good size, slightly warm.
The chip also, the radiator is at the same temperature, a sign of good heat transfer.
I admit, I had a doubt, the heat must cross the pcb...
Hate trying on my living room speakers.
Thanks Michael !
It seems really good quality.
Go hop, I connect it quickly...
Balanced 36v power supply, 8 ohm test speaker.
Well I'm very surprised by the power of this tiny chip...7 mm *7.
The quality of sound and power seems to be stunning!
The inductors are of good size, slightly warm.
The chip also, the radiator is at the same temperature, a sign of good heat transfer.
I admit, I had a doubt, the heat must cross the pcb...
Hate trying on my living room speakers.
Thanks Michael !
