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Class D Switching Power Amplifiers and Power D/A conversion

Class D with GaN FETs & IC  PE29102  (GaN FET) driver
Class D with GaN FETs & IC  PE29102  (GaN FET) driver
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Old 13th April 2019, 05:23 AM   #1
NMOS is offline NMOS  Germany
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Default Class D with GaN FETs & IC PE29102 (GaN FET) driver

Hello

Class D Audio Using the PE29102 driver IC

here reference design

https://www.psemi.com/pdf/app_notes/an72.pdf

Class-D Audio Amplifiers


GaN FETs Devices for audio applications. coming in the market.

GaN FETs are preferred as the switching devices because they offer significant advantages over
MOSFETs. Because GaN FETs are faster, smaller and do not have a body diode, they have fewer switching
losses versus conduction losses, resulting in superior linearity and efficiency


Does somebody already have expereince ?
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Old 15th April 2019, 01:13 PM   #2
NMOS is offline NMOS  Germany
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Nobody interested to start wit new device tecnology GAN-Fets ?

GAN FETS will replace silicon Mosfet in Class D and many mosfet switching circuits

class D amp will have 99 - 100 % efficiency,

no need additional heatsink anymore
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Old 16th April 2019, 12:48 PM   #3
ramp3 is offline ramp3
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I did listen to a prototype GaN class D amp, really good sounding. Bested any other cheapo class D amps I own.

However, quality comes at a price.
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Old 16th April 2019, 01:46 PM   #4
NMOS is offline NMOS  Germany
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Quote:
Originally Posted by ramp3 View Post
I did listen to a prototype GaN class D amp, really good sounding. Bested any other cheapo class D amps I own.

However, quality comes at a price.
which prototype ? manufacturer ,...where to order ?

can you give me more information ?
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Old 16th April 2019, 03:19 PM   #5
Osvaldo de Banfield is offline Osvaldo de Banfield  Argentina
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I also read some about Germanium MOSFETs, but no one I saw at my surround. Perhaps in 20 years we see them in practical uses.
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Old 16th April 2019, 07:23 PM   #6
ramp3 is offline ramp3
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Quote:
Originally Posted by NMOS View Post
which prototype ? manufacturer ,...where to order ?

can you give me more information ?
Soundigital, a brazilian manufacturer. It was a state of the art limited edition car amplifier.

I don't think they are available anymore, perhaps you can find one used online, I've seen an north american guy on DIYMA using it.
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Old 16th April 2019, 11:02 PM   #7
e_fortier is offline e_fortier  Canada
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Class D with GaN FETs & IC  PE29102  (GaN FET) driver
You can try with this evaluation board but it’s very expensive for what it is.

EPC9106 EPC | Development Boards, Kits, Programmers | DigiKey

The Gerber files are available from the above digikey link.
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Last edited by e_fortier; 16th April 2019 at 11:06 PM.
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Old 18th April 2019, 08:25 PM   #8
atmasphere is offline atmasphere  United States
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The trick with GaNs is that they are a lot harder to place on a circuit board. You can put together surface mount stuff pretty easily with a normal soldering station but all the GaN transistors I've seen require that you flow the solder to make connections to them.
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