[NewCLassD NCD4] Need your opinion and help please

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daniboun

daniboun

Member
Joined 2019
#1
Need help for wiring Class D amp (VGATE)

Hi amigos,

I need some help to get the right diagram to wire my NewClass D double Mono amplifier. The problem is : My SMPS 800W PSU does not have any Aux voltage. I need to add another 24V DC PSU for the Vgate...

Can you help me to complete / correct this diagram ? I just need to know how to connect the V+ / V- from the 24V PSU into the Amplifier Vgate input.

This is my actual Setup

Newclass-Dwiring.jpg


Thanks for helping
 
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#2
Hi Daniboun,
I've had a look to the amp user manual and to the smps800 specs as well.
That Vgate voltage was kind of weird to me at first sight but turns out to be a simple low voltage (20..22V theoretically) just needed to feed the driver circuits of the amp's power mosfets.
I suppose this voltage is then properly filtered further on onto the amps PCBA.
It looks from the smps800re datasheet tech spec that the two 15V outputs are totally separated one wrt the other, which is what you need so as to avoid ground loops and/or sub-optimum wiring.
I think your wiring will work good, though for best channel separation you may want one supply ofr each of the power amp, but this would be useless if final use is not intended to offer highest sound quality.
All the best.
 
#3
Kalamin said:
Hi Daniboun,
I've had a look to the amp user manual and to the smps800 specs as well.
That Vgate voltage was kind of weird to me at first sight but turns out to be a simple low voltage (20..22V theoretically) just needed to feed the driver circuits of the amp's power mosfets.
I suppose this voltage is then properly filtered further on onto the amps PCBA.
It looks from the smps800re datasheet tech spec that the two 15V outputs are totally separated one wrt the other, which is what you need so as to avoid ground loops and/or sub-optimum wiring.
I think your wiring will work good, though for best channel separation you may want one supply ofr each of the power amp, but this would be useless if final use is not intended to offer highest sound quality.
All the best.
Click to expand...

Thanks for the feedback. The problem is that I don't want to buy the SMPS 800R specially... I already own a 800W SMPS PSU but without auxiliary...
This why I shared the above diagram (this is my setup): I have my 800W PSU + that 24V PSU. I have no idea how to connect the 24V PSU to the Vgate, any idea ?? can you show me into the diagram ? (V+ or V- to the Vgate input, or both ?)
 
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