Hi,
Can a class D chipamp, say TPA3116D2, drive a higher power mosfet bridge, say IRF540, to yield higher power?
With 4 external mosfets and 48volt smps as supply, power levels can reach 300watts, if distortion is low that is.
I am aware that all chip protection features become unusable.
Thanks and Regards,
WA
Can a class D chipamp, say TPA3116D2, drive a higher power mosfet bridge, say IRF540, to yield higher power?
With 4 external mosfets and 48volt smps as supply, power levels can reach 300watts, if distortion is low that is.
I am aware that all chip protection features become unusable.
Thanks and Regards,
WA
Generally speaking, there is no good way to interface a chip-amp like TA3116 to external FETs. You do not have access to the internal FET gate connections. Class-D is very timing sensitive so any uS delay becomes a big problem. There are a few chips that are designed for external FETs such as: https://www.infineon.com/dgdl/irs2092.pdf?fileId=5546d462533600a401535675f1be2790
See: https://www.amazon.com/s?k=IRS2092&ref=nb_sb_noss
And many class-D chip-amps can be paralleled and/or bridged.
See: https://www.amazon.com/s?k=IRS2092&ref=nb_sb_noss
And many class-D chip-amps can be paralleled and/or bridged.
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bandwidth
It's not about the audio frequency. It's about the switching frequency and timing, particularly "dead time" and cross conduction.
In any case, the TPA3255 reaches your power requirements and is available in ready made modules at great prices. And you may want to consider a UCD from Hypex. Hypex Electronics B.V.
These class-D amps are getting into SMT and high frequency PCB issues where only experts should try to DIY. Do you have a 3D microscope to do your wiring with? Do you have a 500MHz scope?
It's like lots of car people are restoring 55 Chevys but very few are building Teslas, especially from scratch.
It's not about the audio frequency. It's about the switching frequency and timing, particularly "dead time" and cross conduction.
In any case, the TPA3255 reaches your power requirements and is available in ready made modules at great prices. And you may want to consider a UCD from Hypex. Hypex Electronics B.V.
These class-D amps are getting into SMT and high frequency PCB issues where only experts should try to DIY. Do you have a 3D microscope to do your wiring with? Do you have a 500MHz scope?
It's like lots of car people are restoring 55 Chevys but very few are building Teslas, especially from scratch.
An externally hosted image should be here but it was not working when we last tested it.
The 3116 can be used to drive a transformer power amplifier (instead of V1 and V2))).
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The TAS5634 seems to be equivalent to the output part of a TPA3255, and requires a TAS55xx to drive it. But TI's pages on most of the TAS55xx chips are "locked" and the available TAS55xx chips are 8 channels and may not support analog input. I suspect that TPA3255 has replaced TAS5634 for new designs.
OldDIY, there is a strange problem with your link. It only works from the notification email and not from the web page. TPA3116 is capable of 2x50W by itself so you would need a lot of 2N3055s to make a bigger amplifier. This 2x2n3055 amplifier is about 20 Watts. Here is that circuit:
OldDIY, there is a strange problem with your link. It only works from the notification email and not from the web page. TPA3116 is capable of 2x50W by itself so you would need a lot of 2N3055s to make a bigger amplifier. This 2x2n3055 amplifier is about 20 Watts. Here is that circuit:
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