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LM74722-Q1: LM7472x-Q1 TI project and problem to add MOSFET lib.

Part Number: LM74722-Q1
Other Parts Discussed in Thread: LM74721-Q1, LM74720-Q1

Hello,

I downloaded library for LM7422-Q1 from below link:

https://www.ti.com/product/LM74722-Q1?keyMatch=LM7472X-Q1#design-development

1) In this library component symbol looks like LM74720 (VS pin is available). Can I simulate LM74722 by not connecting VS pin ? Or this library doesn't reflect LM74722 ?

I downloaded MOSFET library and I tried add it to the project, but I've got error:

Downloaded library I placed to project location, next I press ADD library and I selected T6_40V_LL_7p2.OLB.

Nest step was to add into project folders this library.

Also in simulation profile this library is visible.

Where I made mistake ?

I am adding project.

LM7472x-Q1_TRANS-2021-11-09T22-16.zip

  • Hi Lukasz,

    Welcome to e2e! Please see my response below.

    1. The same Model can be used for LM74720-Q1, LM74721-Q1 and LM74722-Q1

    DEVICE_SELECT parameter has to be used to select the right device.
    a. DEVICE_SELECT=0, selects the LM74720-Q1 device.
    b. DEVICE_SELECT=1, selects the LM74721-Q1 device.
    c. DEVICE_SELECT=2, selects the LM74722-Q1 device.

    You can leave the VS pin connection as is (connected to C pin) even for LM74722-Q1.

    2. Regarding the issue you are facing in simulating with NVMFS5C426NL PSpice model is that you have not added the .LIB file correctly. Please follow the below procedure.

    • Rename the extension 'T6_40V_LL_rev7p2_pspice.txt' file from '.txt'  to '.LIB'                                                            
    • Now, You need to add the T6_40V_LL_rev7p2_pspice.LIB file for you sub-circuit to the Simulation Profile, PSpice>Edit Simulation Profile, Configuration Files, Library, use the upper Browse button to locate the .LIB file and use the Add to Design button to add the .LIB file to the Design Simulation Profile.