"Phil Allison" wrote in message
...

"Arny Krueger" = Compewter Geek Know All


People like Crown and QSC have been building 5+ KW audio power amps with
SMPS for years.

** But they are not regulated PSUs - but simple square wave inverter
supplies that have no voltage regulation and output 50/60 Hz ripple.

Not necessarily true. I have before me the QSC service manual for their
Powerlight series of power amps with SMPS. Referring to the power supply
schematic on page 80:

(1) The IRGPC50U IGBT power amplifiers in the amp's power supply that
convert line voltage to 100 KHz square waves derive their power from
filtered DC from a 40 amp full wave bridge rectifier.

(2) The IRGPC50U IGBT power amplifiers in the amp's power supply are
controlled by a SG2535 PWM that provides voltage regulation, etc.