Mutiplexing high current?

[EROMLIGNOD]

Hi kids,

I have a number of audio amplifiers (16) that I need to individually multiplex
to a single output.

Unfourtunately, because of the situation, I cannot multiplex the unamplified
signals to a single amp using an ordinary analog mux. I have to have 16
separate amps and multiplex the *amplified* signals. The amps put out 2.5
watts at 1.3 amps.

Is there such a thing as a power mux? Or do I have to use power transistors?

Thanks for all replies.

Don

 

[Baphomet]

"EROMLIGNOD" <eromlignod@aol.com> wrote in message
news:20030911003718.17885.00001039@mb-m05.aol.com...

Hi kids,

I have a number of audio amplifiers (16) that I need to individually
multiplex
to a single output.

Unfourtunately, because of the situation, I cannot multiplex the
unamplified
signals to a single amp using an ordinary analog mux. I have to have 16
separate amps and multiplex the *amplified* signals. The amps put out 2.5
watts at 1.3 amps.

Is there such a thing as a power mux? Or do I have to use power
transistors?

Don -

I'm curious. What is your application?

 

[CFoley1064]

Hi kids,

I have a number of audio amplifiers (16) that I need to individually
multiplex
to a single output.

Unfourtunately, because of the situation, I cannot multiplex the unamplified
signals to a single amp using an ordinary analog mux. I have to have 16
separate amps and multiplex the *amplified* signals. The amps put out 2.5
watts at 1.3 amps.

Is there such a thing as a power mux? Or do I have to use power transistors?

Thanks for all replies.

Don

Not knowing too much about your application, my first instinct would be 16 N.O.
relays.

Good luck.
Chris

 

EROMLIGNOD wrote:

Hi kids,

I have a number of audio amplifiers (16) that I need to individually multiplex
to a single output.

Unfourtunately, because of the situation, I cannot multiplex the unamplified
signals to a single amp using an ordinary analog mux. I have to have 16
separate amps and multiplex the *amplified* signals. The amps put out 2.5
watts at 1.3 amps.

Is there such a thing as a power mux? Or do I have to use power transistors?

Thanks for all replies.

Don

Use 16 DPDT relays that are suitable for the power required. You can switch them
by either using a 16 pole rotary switch (you can do the search), or design a circuit
that uses 16 pushbuttons to latch each of the relays.

--

David

 

[John Fields]

On Sat, 13 Sep 2003 13:16:25 +1000, dmmilne@ozemail.com.au wrote:

EROMLIGNOD wrote:

Hi kids,

I have a number of audio amplifiers (16) that I need to individually multiplex
to a single output.

Unfourtunately, because of the situation, I cannot multiplex the unamplified
signals to a single amp using an ordinary analog mux. I have to have 16
separate amps and multiplex the *amplified* signals. The amps put out 2.5
watts at 1.3 amps.

Is there such a thing as a power mux? Or do I have to use power transistors?

Thanks for all replies.

Don

Use 16 DPDT relays that are suitable for the power required. You can switch them
by either using a 16 pole rotary switch (you can do the search), or design a circuit
that uses 16 pushbuttons to latch each of the relays.

---
Why DPDT?

Form A (SPSTNO) would work and be cheaper.

--
John Fields

 

[Peter Bennett]

On Sat, 14 Feb 2004 15:49:37 -0600, John Fields
<jfields@austininstruments.com> wrote:

On Sat, 13 Sep 2003 13:16:25 +1000, dmmilne@ozemail.com.au wrote:

Use 16 DPDT relays that are suitable for the power required. You can switch them
by either using a 16 pole rotary switch (you can do the search), or design a circuit
that uses 16 pushbuttons to latch each of the relays.

---
Why DPDT?

Form A (SPSTNO) would work and be cheaper.

Double throw relays seem to be more common that single throw. Perhaps
the previous poster was thinking of stereo, which would require two
poles (and DPDT relays are pretty common, anyway...)





--
Peter Bennett, VE7CEI
peterbb (at) interchange.ubc.ca
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