Choosing the MOSFET for a flyback converter
Choosing the MOSFET for a flyback converter
(OP)
Hi all,
I have to design a converter that input voltage that varies from 12 to 48 Volts DC. The output has to be 24 Volts DC at 150 Amps. I am thinking to design a flyback converter. My question is: At 12 Volts input, the primary peak current is about 600 Amps. How can I choose a MOSFET that is able to switch that much current?
Thanks all,
Fabio Pereira
I have to design a converter that input voltage that varies from 12 to 48 Volts DC. The output has to be 24 Volts DC at 150 Amps. I am thinking to design a flyback converter. My question is: At 12 Volts input, the primary peak current is about 600 Amps. How can I choose a MOSFET that is able to switch that much current?
Thanks all,
Fabio Pereira






RE: Choosing the MOSFET for a flyback converter
Greetings:
Mosfets are easily paralled from what i have read.
So you can pick a large standard mosfet and
add enough in parallel to do the trick.
Also some companies make very high power devices
POWEREX and IXYS I think make them.
RE: Choosing the MOSFET for a flyback converter
TTFN
RE: Choosing the MOSFET for a flyback converter
You are probably better looking at an IGBT for that sort of current, otherwise consider using parallel MOSFETs. IR have a good range of high current, low voltage MOSFETs intended for automotive type applications.
RE: Choosing the MOSFET for a flyback converter
There are lots of other topologies more suitable for your application. Try to find some basic literature.
Design a converter of rating which can be achieved without paralleling of devices and then connect several of these converters in parallel.Operate the different converters with phase sgifted clock signals.