0
\$\begingroup\$

I am constructing my own H-Bridge to control a high current motor (24V at 25A), as such I was looking to use high current MOSFETs for each quadrant of the H-bridge. My go too MOSFETs for these applications is the IRF1405 unfortunately the manufacture for these MOSFETs do not offer a complementary P-channel equivalent. What will be the consequences of using a P-channel MOSFET which is not exactly complement to the N-channel MOSFETS in my bridge. Also does anyone have a suggestion for a complementary MOSFET pair which has similar specifications as the IRF1405? (RDS = 5.3mOhm ID= 169A)

The P-channel replacment I am considering is the IPB120P04P4L. I have attached an image of my proposed H-Bridge for your reference.

enter image description here

\$\endgroup\$
3
\$\begingroup\$

In my opinion you would need complementary transistors only for more linear/analog applications like in a (audio) power amplifier.

In an H-bridge you're using the MOSFETs as switches, they're either on or off. I would prefer to use FETs with the same Rdson (on resistance) though although as long as Rdson is low enough that might not even matter.

I would also pay attention to the threshold voltage but also here different Vt for NMOS and PMOS would not matter so much if you drive them properly with a large Vgs (which you should to make Rdson low).

So I would just try to find a suitable PMOS that can do the job and not worry about it not being complementary to the NMOS.

\$\endgroup\$
0
\$\begingroup\$

my opinion is instead of using P-channal MOSFET at high side you can use same IRF1405 as this configuration. http://modularcircuits.com/blog/wp-content/uploads/2011/10/image7.png

\$\endgroup\$
  • 2
    \$\begingroup\$ You should include the image directly in your answer. Also, what you suggest will obviously have a big impact on the driving side, and OP did not told us about this part of the circuit. So, maybe you could extend your answer by giving some hints about what solutions exist to drive the mosfet arrangement you suggested? \$\endgroup\$ – dim Jun 15 '16 at 8:44

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.