Ok to parallel LM2940''s ?
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Posts: 46,084
Ken,
The trouble is, I'm not sure. The project I am working on is a little
tricky. I need to get a PCB together before the school year starts, but the
project is still in the research phase. We may or may not wind up using a DC
to DC converter that would draw 2-3 amps, or we may not. So my plan was to
make the board with jumpers to able to configure the power supply in
different ways. Hopefully, and ideally, we could use the LM2940's
separately, with a common ground, of course. If we can't, I want to make the
board accommodate this. Are there any low dropout regs that can handle 3-4
amps?
Thanks,
Jonathan
www.madlabs.info
Original Message
From: <smartdim@a...>
To: <basicstamps@yahoogroups.com>
Sent: Saturday, August 16, 2003 7:00 AM
Subject: Re: [noparse][[/noparse]basicstamps] Ok to parallel LM2940's ?
> In a message dated 8/15/2003 7:54:15 PM Pacific Daylight Time,
> jpeakall@m... writes:
>
> >
> > Hi All,
> >
> > Is it OK to parallel LM2940's for greater current output?
> >
> > Thanks,
> >
> > Jonathan
>
> Jonathan,
>
> Do you have one device that is consuming more power than one LM2940, or
the
> sum of many devices consumes the exceeds the current output of one LM2940?
>
> Assuming the latter, and the total current consumption from all your
devices
> is say 1.5 amps, the easiest and most foolproof method would be the
following:
>
> Power some of the devices from one LM2940, and power the rest from the
other
> LM2940 and make sure all components share the same ground (big fat wide
> trace).
>
> So one LM2940 will supply about .75 amps, and the other will supply about
.75
> amps.
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
The trouble is, I'm not sure. The project I am working on is a little
tricky. I need to get a PCB together before the school year starts, but the
project is still in the research phase. We may or may not wind up using a DC
to DC converter that would draw 2-3 amps, or we may not. So my plan was to
make the board with jumpers to able to configure the power supply in
different ways. Hopefully, and ideally, we could use the LM2940's
separately, with a common ground, of course. If we can't, I want to make the
board accommodate this. Are there any low dropout regs that can handle 3-4
amps?
Thanks,
Jonathan
www.madlabs.info
Original Message
From: <smartdim@a...>
To: <basicstamps@yahoogroups.com>
Sent: Saturday, August 16, 2003 7:00 AM
Subject: Re: [noparse][[/noparse]basicstamps] Ok to parallel LM2940's ?
> In a message dated 8/15/2003 7:54:15 PM Pacific Daylight Time,
> jpeakall@m... writes:
>
> >
> > Hi All,
> >
> > Is it OK to parallel LM2940's for greater current output?
> >
> > Thanks,
> >
> > Jonathan
>
> Jonathan,
>
> Do you have one device that is consuming more power than one LM2940, or
the
> sum of many devices consumes the exceeds the current output of one LM2940?
>
> Assuming the latter, and the total current consumption from all your
devices
> is say 1.5 amps, the easiest and most foolproof method would be the
following:
>
> Power some of the devices from one LM2940, and power the rest from the
other
> LM2940 and make sure all components share the same ground (big fat wide
> trace).
>
> So one LM2940 will supply about .75 amps, and the other will supply about
.75
> amps.
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>