LM5109: LM5109

Farzaneh Faridi

Part Number: LM5109

Dear Members,

I need to drive two N-channel MOSFETs and two other P-channel MOSFETs. my P-MOSFETs should drive 24V and N-MOSFETs should drive -24V. Each time only one of the MOSFETs works. I was looking at "LM5109" and it seems quite fine but as I could see in its datasheet it's used for NMOS only and I need to find another chip for the PMOS. I don't have any idea. First time searching for a driver.

Can any body help me choosing an adequate chip?

Regards

Farzaneh

over 2 years ago

0 Daniel W over 2 years ago

TI__Genius 13216 points

Hi Farzaneh,

Thank you for posting on E2E. What are the necessary gate voltages to turn on/off your P-MOSFET?

Thanks,

Daniel W

0 Farzaneh Faridi over 2 years ago in reply to Daniel W

Intellectual 585 points

Hi Daniel,

Vgs will be -20. I don't know if there is a chip for all my 4 mosfets. I need a chip that let me drive each mosfet isolated from the other ones. I mean they should work one by one. Right now I have 4 mosfets and there are 4 control signals connected to each gate of those.

I need to turn on one mosfet while the other 3 are OFF. I hope I could explain it well.

0 Daniel W over 2 years ago in reply to Farzaneh Faridi

TI__Genius 13216 points

Hi Farzaneh,

Thank you for the explanation. Unfortunately, we do not have devices designed for this case.

Thanks,

Daniel W

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

Power management

Power management forum

LM5109: LM5109