BUZ11 complemary P channel?

[Jamie]

I would like to know if any one happens to know
the complement P channel to the BUZ11 which is a
Sieman's series of an N-Channel..
I'd be happy with the BUZ10 which has better
on R.,I know that I can find an equivalent via another
maker how ever, I would like to keep both N and P channels
with the BUZ... number series.
I can't find a complete linked list with the BUZ.. for me
to check out.
Maybe one of you guys have that list they can point me
to.

Thanks.

 

[Ross Herbert]

I would like to know if any one happens to know
the complement P channel to the BUZ11 which is a
Sieman's series of an N-Channel..
I'd be happy with the BUZ10 which has better
on R.,I know that I can find an equivalent via another
maker how ever, I would like to keep both N and P channels
with the BUZ... number series.
I can't find a complete linked list with the BUZ.. for me
to check out.
Maybe one of you guys have that list they can point me
to.

Thanks.

It won't be easy finding a direct P-channel complement to the BUZ11
purely because the manufacturers didn't elect to make one. Since you
would like to stick to the European pro-electron typing system then it
is even more difficult to suggest a suitable complementary device. It
will depend to some extent upon your application.

BUZ11 data sheet
http://www.ortodoxism.ro/datasheets/stmicroelectronics/2947.pdf

In the BUZ series all I can find is a BUZ271 which is close but not
all that close. It has Idmax = 22A an RDson = 0.15 ohms.

I would suggest that you move away from the BUZ series and go for a
suitable device such as the STB80PF55 which should complement the
buz11 without any problems.
http://www.st.com/stonline/products/literature/ds/8177/stp80pf55.pdf

If you are prepared to ditch the BUZ11 I would replace the N-channel
with a STB80NF55 which would be a perfect match for the STB80PF55.
This would be the preferred approach if I were in your boat.
http://www.st.com/stonline/products/literature/ds/8260/stb80nf55-06.pdf

 

[Eeyore]

I would like to know if any one happens to know
the complement P channel to the BUZ11 which is a
Sieman's series of an N-Channel..
I'd be happy with the BUZ10 which has better
on R.,I know that I can find an equivalent via another
maker how ever, I would like to keep both N and P channels
with the BUZ... number series.
I can't find a complete linked list with the BUZ.. for me
to check out.
Maybe one of you guys have that list they can point me
to.

The only true power mosfet complements I know of are the audio parts originated
by Hitachi and now also made by Semelab and Exicon.

Expect Ron to be in the 1 ohm region with these.

Graham

 

[Winfield]

... I would suggest that you move away from the BUZ series and
go for a suitable device such as the STB80PF55 ...
http://www.st.com/stonline/products/literature/ds/8177/stp80pf55.pdf
... a STB80NF55 which would be a perfect match for the STB80PF55.
http://www.st.com/stonline/products/literature/ds/8260/stb80nf55-06.pdf

The stp80nf55 and stp80pf55 are a nice pair of complementary-
switching-capability power MOSFETs, both rated at 55V and 80A,
and amazingly cheap at Mouser, $35 buys you 10 pairs. They have
a Ciss of about 5nF, pretty high, yes, but par for the course
for such large-die MOSFETs (rated 300W at 25C, RthJC = 0.5C/W).

But I agree with Graham, if Jamie has a linear use in mind,
like an audio amplifier, he'd be better off choosing lateral
power MOSFETs, with their superior tempco characteristics.
OTOH, if he wants to make complementary linear regulators,
say for +/-24V, etc., then the ST parts are a great choice.

 

[Fred Bloggs]

The stp80nf55 and stp80pf55 are a nice pair of complementary-
switching-capability power MOSFETs, both rated at 55V and 80A,
and amazingly cheap at Mouser, $35 buys you 10 pairs. They have
a Ciss of about 5nF, pretty high, yes, but par for the course
for such large-die MOSFETs (rated 300W at 25C, RthJC = 0.5C/W).

But I agree with Graham, if Jamie has a linear use in mind,
like an audio amplifier, he'd be better off choosing lateral
power MOSFETs, with their superior tempco characteristics.
OTOH, if he wants to make complementary linear regulators,
say for +/-24V, etc., then the ST parts are a great choice.

What do you care about tempco when they're not in parallel and inside a
control loop?

 

[Phil Allison]

"Fred Bloggs"

What do you care about tempco when they're not in parallel and inside a
control loop?

** My god, you ARE fucking stupid.



........ Phil

 

[Fred Bloggs]

"Fred Bloggs"




** My god, you ARE fucking stupid.



....... Phil

No doubt, why don't you answer the question and show me just how
"stupid" I am, tosser?

 

[Winfield]

No doubt, why don't you answer the question and show
me just how "stupid" I am, tosser?

There's just no understanding Phil, something drives
him to respond with vitriol instead of conversation.

As for my comment - I was thinking of the class-AB
biasing of audio power amplifiers, where an ordinary
power MOSFET's high Vgs vs Id tempco (at the desired
moderately-low drain current) adds to the difficulty
of setting and keeping the desired quiescent current.
As a result, the output stage's quiescent current may
either eventually drift too low, causing excessive
distortion, or too high, causing excess heating (warm
up that room some more, in the middle of summer!) or
early failures. The lateral MOSFETs have their zero
tempco point near common Id quiescent current levels,
and they also have rather low Vgs voltages, further
easing the job of class-AB bias. This means the
designer can set the quiescent current higher than
otherwise, so the amplifier can have less distortion,
without high feedback levels.

 

[Phil Allison]

"Fred Bloggs Fucking PITA TROLL" "

No doubt, why don't you answer the question

** Cos you did not ask one.

Cos you did not what to learn anything.

You fucking ARROGANT cunthead.





....... Phil

 

[Fred Bloggs]

There's just no understanding Phil, something drives
him to respond with vitriol instead of conversation.

As for my comment - I was thinking of the class-AB
biasing of audio power amplifiers, where an ordinary
power MOSFET's high Vgs vs Id tempco (at the desired
moderately-low drain current) adds to the difficulty
of setting and keeping the desired quiescent current.
As a result, the output stage's quiescent current may
either eventually drift too low, causing excessive
distortion, or too high, causing excess heating (warm
up that room some more, in the middle of summer!) or
early failures. The lateral MOSFETs have their zero
tempco point near common Id quiescent current levels,
and they also have rather low Vgs voltages, further
easing the job of class-AB bias. This means the
designer can set the quiescent current higher than
otherwise, so the amplifier can have less distortion,
without high feedback levels.

OIC, interesting. I ran a google on "class AB MOSFET amplifier quiescent
current stabilization", turns up a few patents. Apparently this is an
ongoing issue at RF. Thank you

 

[Fred Bloggs]

"Fred Bloggs Fucking PITA TROLL" "




** Cos you did not ask one.

Cos you did not what to learn anything.

You fucking ARROGANT cunthead.





...... Phil

I really love the similes involving monkeys and dead donkeys, can't you
do better?

 

[John Devereux]

I really love the similes involving monkeys and dead donkeys, can't
you do better?

Try it with an aussie accent.

 

[Michael A. Terrell]

Try it with an aussie accent.

Didn't help. It still sounds like the words of a very sick aussie
idiot.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Jamie]

It won't be easy finding a direct P-channel complement to the BUZ11
purely because the manufacturers didn't elect to make one. Since you
would like to stick to the European pro-electron typing system then it
is even more difficult to suggest a suitable complementary device. It
will depend to some extent upon your application.

BUZ11 data sheet
http://www.ortodoxism.ro/datasheets/stmicroelectronics/2947.pdf

In the BUZ series all I can find is a BUZ271 which is close but not
all that close. It has Idmax = 22A an RDson = 0.15 ohms.

I would suggest that you move away from the BUZ series and go for a
suitable device such as the STB80PF55 which should complement the
buz11 without any problems.
http://www.st.com/stonline/products/literature/ds/8177/stp80pf55.pdf

If you are prepared to ditch the BUZ11 I would replace the N-channel
with a STB80NF55 which would be a perfect match for the STB80PF55.
This would be the preferred approach if I were in your boat.
http://www.st.com/stonline/products/literature/ds/8260/stb80nf55-06.pdf

Ok, I took a look at the specs.
They look like they'll do the job. Even the Vgs is better than I was
hoping for.
The fact that they come in the old 220 style is a plus because I
already have a board put together that houses a 220 body. (4).
This will be used in a 48 volt DC motor system where i'll need a
bridged output to control the direction and speed.
The AVR and driving circuit is already in place awaiting the outputs.

I've already done this before using much smaller output bridged
components. This application will be much more power hungry and is
design to allow the battery to drop way down in the valley before shut
down.
I have an onboard inverter to drive the Fets for this.

Thanks for the numbers.

 

[Phil Allison]

"Fred Bloggs"


** My god, you ARE fucking stupid.




........ Phil

 

[Fred Bloggs]

"Fred Bloggs"


** My god, you ARE fucking stupid.




....... Phil

Okay, thanks for pointing that out...