TPA3116 2x50W vs 2x100W

[walpha]

What class d amplifier board should i get if focussing onto a 2.0 System while using Speakers that are 6ohm (as alternative 8Ohm)

I've read that 2x100W with dual TPA3116 is just bridged so 2Ohm Speakers can be used and do not provide more Power with 6Ohm Speakers than single TPA3116

is that true?

I want to order this one as dual TPA3116:

Bluetooth Verstarker Board HiFi Stereo 2.0 TPA3116D2: Amazon.de: Elektronik

or that one as single TPA3116:

Bluetooth Verstarker Board HiFi Stereo 2.0 TPA3116D2: Amazon.de: Elektronik

than i have read that coils with 33mH (as used mostly on dual TPA3116) is not ideal for 6ohm speakers

the dual one above has 15mH coils and the single tpa3116 has 10mH coils

 

[FauxFrench]

I've read that 2x100W with dual TPA3116 is just bridged so 2Ohm Speakers can be used and do not provide more Power with 6Ohm Speakers than single TPA3116
is that true?
True!

I want to order this one as dual TPA3116:
Bluetooth Verstarker Board HiFi Stereo 2.0 TPA3116D2: Amazon.de: Elektronik
or that one as single TPA3116:
Bluetooth Verstarker Board HiFi Stereo 2.0 TPA3116D2: Amazon.de: Elektronik
than i have read that coils with 330ohm (as used mostly on dual TPA3116) is not ideal for 6ohm speakers
the dual one above has 150ohm coils and the single tpa3116 has 100 ohm coils
The normal value of such coils is in milliHenry. Thus 10mH, 15mH, 22mH or 33mH. For 6 Ohm loads, NXP generally use 15mH and 1uF in the output filter.
33mH coils of such small physical size have a problem with the saturation limit. 15mH or eventually 10mH are better choices.

I do not know the boards you show.

 

[walpha]

yeah your right epic fail thats "henry" not ohm for coils


So beside that the dual chip version may have more ideal coils (15mH) than single chip (10mH) for 6 ohm speakers, is there any other advantage?

How about functionality if one chip is burned does it still work?

 

[multisync]

I think you mean uH as in micro Henry not milly Henry. There is a difference of 1000x

 

[FauxFrench]

Well spotted and replied! microHenry.
My wife has forced me to do too much garden-work in a very hot garden lately. I start forgetting the class D design details.
Mes excuses.

 

[bucks bunny]

We are not multi-tasking enabled😀

 

[walpha]

So no advantage using the dual TPA3116 model here? Like better stability or does not burn to fast?

 

[Mark Tillotson]

i have read that coils with 330ohm (as used mostly on dual TPA3116) is not ideal for 6ohm speakers
the dual one above has 150ohm coils and the single tpa3116 has 100 ohm coils

This presumably is a misunderstanding upon seeing "330", "150" or "100"
printed on top of the inductors. These mean 33µH, 15µH and 10µH respectively
as the last digit is the multiplier, just as with resistor and capacitor codes, and
the µH is implied. "101" would be a 0.1mH inductor.


Yes inductance will be less (and capacitance more) for a lower impedance load
in these filters.