25 November 2016 I have built a 1kW Class D amp for none linear digital transmissions around 136kHz. My Dave Pick designed amp uses four MOSFETS, two in parallel each side driven by a dedicated drive
Hi Chris, A H bridge can handle the 320V DC much easier. It is a question of the availability of high voltage rated MOSFETs. In a H bridge you can use normal 500V types, like the cheap IRFP460A. For
Quite simple. Same number of FETs for given power, you either parallel them in half-bridge, or use singly in H bridge But H-bridge give you four times the impedance, and high Z is always good new
continuing... The gate resistor just has to swamp teh Xc of the gate capacitance in a linear amp, to make it look clean and resistive at the input. So, for example, assume 2000pF Cgs at 475kHz. X
Forget my comments about gate resistors, you said for a non linear (switching) design. I was talking about linear amps As the last post said, small values to damp oscillations if any are needed at a
Hello Stefan and Andy, Friday, November 25, 2016 Thanks for the replies, I see now how similar they are to an H Bridge in a SMPS, and I have also found some good info from the audiophile world on H B
Chris The Decca 5501 amp modules use a H bridge class D configuration followed by a series resonant PA circuit and this is probably one of the most reliable amplifiers about. Use suitable rated FET'S
My experiences with class E single ended amplifiers is similar to that reported by Mal. The only caveat I would add is that you should be quite sure that you have the right driving waveform. During m
