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Trend ? High-Side switch

Hi,

I'd hoped to respond to an earlier thread but alas it's been more than
30 days.

Seems like not so many years ago high-side switches were "hot", ads
articles etc. Of course I didn't need one then. Now I'm looking for
one (12V 0.5A 100mOhm) and am finding

= high side switches are readily available for 2.7-5.5V applications

= Infineon has a line of parts, not readily available in small qty.

= IR line of IPS are all marked as not-recommended-for-new-design

= Vishay Si4750 don't know what's the availability

So I'm wondering, what is the trend these days ? (for switching, not
motor drive, application) I'm trying to decide between the Infineon
part and using a solution with separate driver and MOSFET.

Thanks for any help !

-rajeev-
 
J

Joerg

Jan 1, 1970
0
Hi,

I'd hoped to respond to an earlier thread but alas it's been more than
30 days.

Seems like not so many years ago high-side switches were "hot", ads
articles etc. Of course I didn't need one then. Now I'm looking for
one (12V 0.5A 100mOhm) and am finding

= high side switches are readily available for 2.7-5.5V applications

= Infineon has a line of parts, not readily available in small qty.

= IR line of IPS are all marked as not-recommended-for-new-design

= Vishay Si4750 don't know what's the availability

So I'm wondering, what is the trend these days ? (for switching, not
motor drive, application) I'm trying to decide between the Infineon
part and using a solution with separate driver and MOSFET.

Probably I'd opt for the driver and FET solution. If the chip is single
sourced I'd be concerned about availability and obsolescence.
 
J

John Fields

Jan 1, 1970
0
Hi,

I'd hoped to respond to an earlier thread but alas it's been more than
30 days.

Seems like not so many years ago high-side switches were "hot", ads
articles etc. Of course I didn't need one then. Now I'm looking for
one (12V 0.5A 100mOhm) and am finding

= high side switches are readily available for 2.7-5.5V applications

= Infineon has a line of parts, not readily available in small qty.

= IR line of IPS are all marked as not-recommended-for-new-design

= Vishay Si4750 don't know what's the availability

So I'm wondering, what is the trend these days ? (for switching, not
motor drive, application) I'm trying to decide between the Infineon
part and using a solution with separate driver and MOSFET.

Thanks for any help !
 
C

Carl Ijames

Jan 1, 1970
0
DigiKey carries a selection of the infineon parts - search for profet.
 
Y

Yuriy K.

Jan 1, 1970
0
Now I'm looking for one (12V 0.5A 100mOhm)

STM - VNxxx(i.e. VN750).
Infineon - BSP742/752

Digikey has them on stock.
Arrow/Future carry some high-side switches too.
 
M

Martine Riddle

Jan 1, 1970
0
It seems they dropped a High side switch that would have fit the
application. Nothing but 2.7-5.5v parts. I wish I remember what the part was
I used a few years back. But it could Handle 15v.

Cheers
 
R

Robert

Jan 1, 1970
0
A guy has taken the guts from one of those "ion breeze" air cleaners and is
using that to pump air inside a PC case over some passive heatsinks on the
CPU and such. I wouldn't think they would pump much CFM but don't know.
Anyone have any experience with them.

He matches that silent air circulator with a solid state disk and no moving
parts power supply to get a totally silent PC.

http://www.inventgeek.com/Projects/IonCooler/Overview.aspx

Robert
 
L

Little Steve

Jan 1, 1970
0
Robert said:
A guy has taken the guts from one of those "ion breeze" air cleaners and is
using that to pump air inside a PC case over some passive heatsinks on the
CPU and such. I wouldn't think they would pump much CFM but don't know.
Anyone have any experience with them.

He matches that silent air circulator with a solid state disk and no moving
parts power supply to get a totally silent PC.

http://www.inventgeek.com/Projects/IonCooler/Overview.aspx

Robert
Robert, try posting this as a separate thread. It's not good practice to
post a new thread as a response to an earlier one. Also, no one can see it
unless they open the "Trend High Side Switch" thread.

.... Steve
 
J

John Fields

Jan 1, 1970
0
It seems they dropped a High side switch that would have fit the
application. Nothing but 2.7-5.5v parts. I wish I remember what the part was
I used a few years back. But it could Handle 15v.
 
A

AZ Nomad

Jan 1, 1970
0
A guy has taken the guts from one of those "ion breeze" air cleaners and is
using that to pump air inside a PC case over some passive heatsinks on the
CPU and such. I wouldn't think they would pump much CFM but don't know.
Anyone have any experience with them.

s/much/any

The ionic breeze has no pump and doesn't work at all as an air filter.

If you're lucky, you might get some convection, but it won't anything to do
with the IB's snake oil.
 
J

Jim Thompson

Jan 1, 1970
0
s/much/any

The ionic breeze has no pump and doesn't work at all as an air filter.

If you're lucky, you might get some convection, but it won't anything to do
with the IB's snake oil.

Duller Image sued Consumer Reports for calling IB worthless. Consumer
Reports prevailed, yet Duller Image keeps advertising that
piece-a-crap.

...Jim Thompson
 
People,

Thanks all for your posts and valuable suggestions...

= HighSideDriver+Discrete... might still do this.

= BSP742/752... I think I veered away from these when I saw that they
are not RoHS compliant, and Infineon ISP parts are all RoHS compliant.
For better or for worse, I have been using RoHS availability as a kind
of proxy for recommended-for-new-designs.

= Micrel, I'll investigate both parts.

= VN750, that's good to know about.

Let me investigate and report back. Btw my OP said 100 mOhm, my
mistake: the 0.1 on my mind was V, could probably go higher if needed,
only I'm already concerned about resistive line drop and 5% tolerance
on the power supply.

Thanks !

-rajeev-
 
R

Robert

Jan 1, 1970
0
AZ Nomad said:
s/much/any

The ionic breeze has no pump and doesn't work at all as an air filter.

If you're lucky, you might get some convection, but it won't anything to
do
with the IB's snake oil.

The ionic breeze type cleaner claims it circulates air **and** cleans it.
The guy is apparently using the guts as a silent air circulation system
across the passive heatsinks on the CPU and other components. He includes
CFM numbers in the table of the last section. I just don't know whether to
believe the high numbers he quotes.

Robert
 
R

Robert

Jan 1, 1970
0
Jim Thompson said:
Duller Image sued Consumer Reports for calling IB worthless. Consumer
Reports prevailed, yet Duller Image keeps advertising that
piece-a-crap.

...Jim Thompson

Yeah, I heard about that. I don't remember him quoting that brand but it's a
similar type. I'm just surprised it can move air by the amount he says in
the table at the end. He's just using it as a silent air mover over the
passive heatsinks with no "cleaning" going on. The most likely explanation
is he's wrong in his measurements.

Robert
 
A

AZ Nomad

Jan 1, 1970
0
The ionic breeze type cleaner claims it circulates air **and** cleans it.
The guy is apparently using the guts as a silent air circulation system
across the passive heatsinks on the CPU and other components. He includes
CFM numbers in the table of the last section. I just don't know whether to
believe the high numbers he quotes.

It doesn't circulate anything. It can precipitate a little dust into
little ionized clumps. It can put some ozone in the air. But it doesn't
circulate anything. The ads and claims are bullshit.
 
R

Rich Grise

Jan 1, 1970
0
The ionic breeze type cleaner claims it circulates air **and** cleans it.
The guy is apparently using the guts as a silent air circulation system
across the passive heatsinks on the CPU and other components. He includes
CFM numbers in the table of the last section. I just don't know whether to
believe the high numbers he quotes.

I don't see why an "ionic breeze" couldn't theoretically work - with the
right electrode design, I'd think that a plasma stream might entrain air,
or maybe it's just a combination of static and inertia.

I'm also thinking about stuff like those "levitator" ideas, which AFAIK
were just ionic jets of some kind.

Anybody got the straight poop?

Thanks,
Rich
 
A

AZ Nomad

Jan 1, 1970
0
I don't see why an "ionic breeze" couldn't theoretically work - with the
right electrode design, I'd think that a plasma stream might entrain air,
or maybe it's just a combination of static and inertia.

Look up the word "static" sometime. :) The ionic breeze generates
some static electricity; it can't generate a continuous flow.


I'm also thinking about stuff like those "levitator" ideas, which AFAIK
were just ionic jets of some kind.
Most of them are just magnetic revulsion.
Anybody got the straight poop?

Why not just get a quiet case and a quality cpu fan?
 
R

Rich Grise

Jan 1, 1970
0
Look up the word "static" sometime. :) The ionic breeze generates
some static electricity; it can't generate a continuous flow.

Most of them are just magnetic revulsion.


Why not just get a quiet case and a quality cpu fan?

Well, I meant the straight poop about ionizing air, accelerating the ions
through an electric field, and entraining ordinary un-ionized[1] air in
the resulting ion stream, but thanks anyway! :)

Cheers!
Rich

[1] Unionized air won't work for those kinds of wages. ;-)
 
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