Switching topologies for power electronics

[Matthew Langille]

What is the difference between a full or half bridge constructed out
of MOSFETs, and one constructed out of IGBTs? What are the pros and
cons of each, and which would be more suitable for a high frequency
switching circuit for a low-power application?

Thank you!

 

[Phil Allison]

"Matthew Langille"

What is the difference between a full or half bridge constructed out
of MOSFETs, and one constructed out of IGBTs? What are the pros and
cons of each, and which would be more suitable for a high frequency
switching circuit for a low-power application?

**Wrong newsgroup - pal.

Homework questions like that should be posted on "sci.electronics.design".

The folk there know just what to do with people like you.



..... Phil

 

[Jon Slaughter]

Matthew Langille wrote:

What is the difference between a full or half bridge constructed out
of MOSFETs, and one constructed out of IGBTs? What are the pros and
cons of each, and which would be more suitable for a high frequency
switching circuit for a low-power application?

Thank you!

IGBT's are generally slower and for larger voltages/high power applications.
They are BJT's with an insulated gate. Hence the CE part acts like a BJT but
the gate/base acts like a mosfet(lower power and voltage controlled).

For low voltage/low power/high switching you go with mosfets. (although
IGBT's are starting to compete well with mosfets speed they are usually more
expensive)

 

[Frederick Williams]

Matthew Langille wrote:

What is the difference between a full or half bridge constructed out
of MOSFETs, and one constructed out of IGBTs? What are the pros and
cons of each, and which would be more suitable for a high frequency
switching circuit for a low-power application?

Thank you!

Why is the word 'topologies' used in this question?

--
Which of the seven heavens / Was responsible her smile /
Wouldn't be sure but attested / That, whoever it was, a god /
Worth kneeling-to for a while / Had tabernacled and rested.

 

[John Larkin]

On Wed, 25 Nov 2009 16:03:37 -0800 (PST), Matthew Langille
<skinnyluigi@gmail.com> wrote:

What is the difference between a full or half bridge constructed out
of MOSFETs, and one constructed out of IGBTs? What are the pros and
cons of each, and which would be more suitable for a high frequency
switching circuit for a low-power application?

Thank you!

IGBTs are big and slow. Fets are faster and come in all sorts of
sizes.

So: fets.

John