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Class D Switching Power Amplifiers and Power D/A conversion

SystemD_2kW, any interest for an open design?
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Old 21st October 2017, 05:45 PM   #521
ChocoHolic is offline ChocoHolic  Germany
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Join Date: Dec 2003
Location: Munich
Quote:
Originally Posted by VolunteerSoundGuy View Post
Well, according to Choco (and I believe it), there's a fair amount of extra complexity involved with bridging class D, mostly from coordinating the switching times.
...scratching my head, because I am not aware of warning against bridged classD.
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Old 21st October 2017, 06:11 PM   #522
ChocoHolic is offline ChocoHolic  Germany
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Location: Munich
Quote:
Originally Posted by kartino View Post
Fullbridge vs high volt halfbridge definitely fullbridge more simple in term of switching behaviour because of working in low level voltage.
Yup, fully agree for our todays silicone MosFets.
SiC or GaN open the door for easy handling of higher voltages in class D.
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Old 21st October 2017, 08:13 PM   #523
VolunteerSoundGuy is offline VolunteerSoundGuy  United States
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Quote:
Originally Posted by ChocoHolic View Post
...scratching my head, because I am not aware of warning against bridged classD.
Quote:
Originally Posted by ChocoHolic View Post
Full bridge tells about the hardware, while BTL names a drive pattern.
Common drive patterns of a full bridge are:
- Inverse PWM signal for the opposite halfbridge
- BTL
- Phase shift
- Pulse density
Not a warning against doing it at all; just more options to choose from than for a linear amp, all of which have to do with switching patterns.
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Old 21st October 2017, 08:17 PM   #524
VolunteerSoundGuy is offline VolunteerSoundGuy  United States
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Join Date: May 2015
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Quote:
Originally Posted by ChocoHolic View Post
Yup, fully agree for our todays silicone MosFets.
SiC or GaN open the door for easy handling of higher voltages in class D.
I wasn't really thinking *that* high because my country's 120V mains rectify directly to Choco's DC supply, which is not a problem at all for ordinary silicon FETs.

How high are you going, kart?!?
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Old 21st October 2017, 09:52 PM   #525
ChocoHolic is offline ChocoHolic  Germany
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Location: Munich
Usually I am doing electronics in the low voltage range. Means below 1kV.
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