Allegro's Hall-effect current sensors

[Winfield Hill]

Allegro's Hall-effect current sensors are interesting small ICs,
with 1.1kV-peak electrical isolation from the current-carrying
wire, http://www.allegromicro.com/sf/0704/index.asp

I bring this up only because I found an Allegro app note with
a fascinating illustration of the construction of these ICs,
http://www.allegromicro.com/techpub2/an/an26030.pdf

 

[Tim Shoppa]

Allegro's Hall-effect current sensors are interesting small ICs,
with 1.1kV-peak electrical isolation from the current-carrying
wire, http://www.allegromicro.com/sf/0704/index.asp

Very interesting. I've seen larger-current parts, obviously for large
motor drives/hybrid vehicles, but never available off-the-shelf or so
affordably. Newark's price is about $3 in small quantity and I can
think of all sorts of things that this makes feasible to me now.

Tim.

 

[John Larkin]

Allegro's Hall-effect current sensors are interesting small ICs,
with 1.1kV-peak electrical isolation from the current-carrying
wire, http://www.allegromicro.com/sf/0704/index.asp

I bring this up only because I found an Allegro app note with
a fascinating illustration of the construction of these ICs,
http://www.allegromicro.com/techpub2/an/an26030.pdf

Hmmm, now I can compute the instantaneous junction temperature of
*every fet* in a power amp.

John

 

[Joerg]

Hello Win,

Allegro's Hall-effect current sensors are interesting small ICs,
with 1.1kV-peak electrical isolation from the current-carrying
wire, http://www.allegromicro.com/sf/0704/index.asp

I bring this up only because I found an Allegro app note with
a fascinating illustration of the construction of these ICs,
http://www.allegromicro.com/techpub2/an/an26030.pdf

Thanks! I took the liberty to post a similar message in the German
electronics newsgroup. Of course not without quoting you as the source.

Digikey states $1.62 for 3000qty. That comes dang close to the usual
toroid solution except that it is unlikely that there'd be a 2nd source
for a long time.

Regards, Joerg

 

[legg]

Hello Win,



Thanks! I took the liberty to post a similar message in the German
electronics newsgroup. Of course not without quoting you as the source.

Digikey states $1.62 for 3000qty. That comes dang close to the usual
toroid solution except that it is unlikely that there'd be a 2nd source
for a long time.

http://www.zetex.com/3.0/3-3-2b.asp?rid=77&pno=ZMY20#ZMY20

http://www.zetex.com/3.0/3-3-2b.asp?rid=76&pno=ZMC20#ZMC20

RL

 

[Marte Schwarz]

Hi all,

http://www.zetex.com/3.0/3-3-2b.asp?rid=77&pno=ZMY20#ZMY20

www.lem.de OK take www.lem.com instead
www.sensitec.de I don't know the english page
I remember, there is a company named LUST around, too. But trying to search
something using this word produces too much shit...

I used them 6 years ago... whats new in this topic?

Marte

 

[Joerg]

Hello Marte,

www.lem.de OK take www.lem.com instead
www.sensitec.de I don't know the english page
I remember, there is a company named LUST around, too. But trying to search
something using this word produces too much shit...

ROFL! I bet it did, huh? It's scary what's out on the web these days,
especially when thinking about kids who could come across that.

Anyway, try:
http://www.lust-drivetronics.de/cgi-bin/page.pl?idx=2&detail=&l=1

I used them 6 years ago... whats new in this topic?

To me it's the really low price of the Allegro parts that Win mentioned.
This might allow their use in situations where so far cost had ruled out
a good Hall sensor solution.

Regards, Joerg