LMG3410R070: low-side only application?

Brian Machesney

Part Number: LMG3410R070
Other Parts Discussed in Thread: TINA-TI

I expected to be able to modify the TINA-TI example circuit for this part (snom608b.tsc) to familiarize myself with it in a low-side only application, but I have failed.

Removed the high-side device (U1) and it's associated components
Removed the output low-pass L-network
Connected V1 to the drains of U2 through a 100-ohm resistor
Left the VSW probe at the U2 drains
Plotted VSW vs time

VSW does not get pulled down by VG2 applied to IN on U2. What have I done wrong?

over 4 years ago

0 Yichi Zhang. over 4 years ago

TI__Genius 16390 points

Hello Brian,

Thanks for reaching out to us. We have duplicated this issue and will correct it in a timely manner. We can contact you once the new model is posted.

Meanwhile, please use the PSpice model posted online to do the simulation. We apologize for the inconvenience.

Regards,

0 Brian Machesney over 4 years ago in reply to Yichi Zhang.

Prodigy 175 points

My tools cannot run the encrypted PSpice model, so I need to use TINA-TI. This part is a serious candidate for my design, so I need a fix as soon as possible.

For additional investigation, I reduced the frequency of VG1 to 10kHz. VSW charges back to V1 even when VG1 is off.

0 Yichi Zhang. over 4 years ago in reply to Brian Machesney

TI__Genius 16390 points

Hello Brian,

Please accept the friend request and I can send you the unencrypted PSpice model. The unencrpted version is also scheduled to be released online soon.

Regards,

0 Brian Machesney over 4 years ago in reply to Yichi Zhang.

Prodigy 175 points

Thank you, Mr Zhang. I accepted your friend request.

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LMG3410R070: low-side only application?