How are made Powersoft Digam amps?

[joseph r]

Hi there, I wanted to know whats inside a powersoft digam amp like the k10. Does anyone have already had a look inside or better a schematic?

 

[MicrosiM]

there is a class-d amp, with SMD chip driving the whole circuit, impossible to identify

A full bridge SMPS, with PFC at output of the SMPS with too many bulk capacitors

Without any bulk capacitor at the input of the SMPS, I like some ideas in the SMPS design, but its not the ultimate solution.

Its just a new idea, for a small amplifier, but I think it sound just OK, not perfect

Regards

 

[joseph r]

ok thanks microsim. But the pfc should be at input of smps and not output?
Isnt all the modulation PWM and error amplifier made by a DSP/microrocessor? Or is it still some analog signal path?

 

[MicrosiM]

ok thanks microsim. But the pfc should be at input of smps and not output?
Isnt all the modulation PWM and error amplifier made by a DSP/microrocessor? Or is it still some analog signal path?

Yes Joseph,

You are right about that, and to tell you truth I was surprized when I saw the schematics.

But dont forget, they are not using any bulk capacitors at the input of the SMPS!

those high voltage caps are not there! but they are using a PFC at the output + 21 capacitors, and it looks to me also, in this way they will regulate the SMPS without using a complex regulation circuit.


the PWM and processor only for the AMPLIFIER circuit, and has nothing to do with the SMPS, SMPS is a FULL Bridge SMPS ( I like the circuit)

Hope that helps


Regards