https://www.infineon.com/dgdl/irs20965sp...761d8b279b
https://www.infineon.com/dgdl/Infineon-I...5a8fa04a9b
Both chips are PWM input and capable of driving IGBTs. Last chip should allow us to draw current directly from AC without violating isolation hazards.
All the power supply we need is some tiny isolated 2-3€ switching DC to DC converter for the chip. Everything else will be connected directly to rectified AC, ground will be neutral, floating design, some diodes here and there, some zeners to make sure, some bootstrap, few resistors, nothing serious.
In order to isolate speaker for safety reasons or go "tube", we could build up multiple chips to create conditions for centertapped transformer.
PRO thing is that we loose that bulky high-expensive transformer from the powersupply and use 2 diodes only for RECT. There will be only 2 diode sound on the speaker.
Can be made all digital too. Analog only in speaker cables.
So my point is that all this costs nothing and should be researched into.
Approx size could be 15x15cm for PWM.
A very attractive and fancy design, suitable for 2022. Super green too :), maybe sound close to tubes. You can put it into ur pocket, take a walk to friends house and easily compare amps.
Also, can be used as a battery powered amp with a boost converter, for headphones.
Is someone interested ?
Protsessor tut toze jest, ADC ili PWM signal sasdavat.
Davaite, zdelajem stote sovremennoe i malenkoje i prosto ahujetitelno zvuk
