Hello fellow switchmode fans
I recently made some Amplifier modules to use it in several Projects of mine...
Like the title says its UCD style, with dual power supply.

I studied Bruno Putzeys paper + the UM10155 application note from Philips
and developed my version of an discrete class d.
The biggest change was a simple buck with 2 Transistors to generate the 12V for the mosfet drive.
The pcb is only ~ 5 x 7 cm but with smd on both sides.
Used fets are: IPP147N12N3GXKSA
Inductors are t-106-2

Until now the only test i did, was drivng a 8 ohm PA sub with two modules bridged at +-48V at full power.
In idle 2 amps drain ca 6w.
Nothing overheated, but i will add a fan to keep the pcb cool.
The heatsink is really oversized, it didnt even get warm

The audio signal is managed by an ADAU1701.

Here some pictures:

IMG_20190409_114243.jpg
IMG_20190409_114300.jpg
IMG_20190409_174359.jpg
IMG_20190409_174344.jpg

Greetings
David