Class D amps and Switch mode power supplies.

[Chris Berry]

Hi Folks,

I'm looking for a good place to get acquainted with Class D amps and Switch
mode power supply design.

My key interest areas are high power (500W+) Audio/PA amps and power
supplies for both these amps, class AB and valve amps (if that's at all
possible).

I'd like to start on a couple of projects such as a 40 - 0 - -40V power
supply for my 200W practice amp and maybe build a 500W+ amp if the
weight/performance/cost warrants it.

I hope this is the right forum for discussing this - otherwise, tell me
where to go ;-)
Thanks.
cb

 

[[email protected]]

Hi Folks,

I'm looking for a good place to get acquainted with Class D amps and Switch
mode power supply design.

My key interest areas are high power (500W+) Audio/PA amps and power
supplies for both these amps, class AB and valve amps (if that's at all
possible).

I'd like to start on a couple of projects such as a 40 - 0 - -40V power
supply for my 200W practice amp and maybe build a 500W+ amp if the
weight/performance/cost warrants it.

I hope this is the right forum for discussing this - otherwise, tell me
where to go ;-)
Thanks.
cb

Try these companies:

A&I Robotics, Acoustic Reality, Apogee Technology, B&O, Behringer, Bel
Canto, Champion Microelectronic (Taiwan), Compact Power Company,
D2Audio, Deton, Flying Mole, JAM Tech, JRC, MAXIM, Micro Analog
Systems, Microsemi/Linfinity,
Mitsubishi, Motorola, Mueta, National Semiconductor, NeoFidelity,
nPhysics, Orvelle Technologies, Philips, Power Physics, Power Soft,
Pristine Audio, PS Audio, Pulsus, PWM Systems, Radical Electronics,
Rebix, Sanken, Sanyo,
Sound Labs Group / ZAPpulse, Soundmatters, Spectron, ST
Microelectronics, Stewart Audio, Texas Instruments, Tripath, Zetex

Some of the above, like Texas instruments and Tripath, make some chips
for what you want to do. Their application notes are very informative.
Other companies in the above list have amplifier products (PWM Systems,
Power Physics) and there is some useful data on their websites.

Regards,

Frank Raffaeli
http://www.aomwireless.com/

 

[Ban]

Try these companies:

A&I Robotics, Acoustic Reality, Apogee Technology, B&O, Behringer, Bel
Canto, Champion Microelectronic (Taiwan), Compact Power Company,
D2Audio, Deton, Flying Mole, JAM Tech, JRC, MAXIM, Micro Analog
Systems, Microsemi/Linfinity,
Mitsubishi, Motorola, Mueta, National Semiconductor, NeoFidelity,
nPhysics, Orvelle Technologies, Philips, Power Physics, Power Soft,
Pristine Audio, PS Audio, Pulsus, PWM Systems, Radical Electronics,
Rebix, Sanken, Sanyo,
Sound Labs Group / ZAPpulse, Soundmatters, Spectron, ST
Microelectronics, Stewart Audio, Texas Instruments, Tripath, Zetex

Some of the above, like Texas instruments and Tripath, make some chips
for what you want to do. Their application notes are very informative.
Other companies in the above list have amplifier products (PWM
Systems, Power Physics) and there is some useful data on their
websites.

Regards,

Frank Raffaeli
http://www.aomwireless.com/

extensive list, but some addition:
I use the Hypex UcD400 module http://www.hypex.nl/ . But they do not have
SMPS, they sell normal transformer based supplies though. +/-40V is too low
for it, I use +/-60V.
Valve amps are not high power and won't sell for a 150$(w/o supply) either.

 

[Chris Berry]

Thanks for the replies, I'm well on my way now.
WRT valves, you can get a start for under $150 (without PSU that is)
http://www.ceriatone.com/
Oh... There's the small matter of the output transfoermer as well... you can
get lucky looking round for some junk though.
cb