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LT8390 TG1 mosfet issue

Category: Hardware
Product Number: LT8390

Hello!

I made a high power DC/DC converter and the mosfet TG1 doesn´t open, the waveform Vgs is:

zooming:

and the Vg refered to ground (blue) and sw1(ellow) node is:

The bst capacitor is charged to 3v only

what can be the problem?

Top Replies

  • FormerMember
    FormerMember
Jun 20, 2022 in reply to gest +1 suggested

Try getting a demoboard for the LT8390-1 and try converting it to your design. It can help you debug your problem. If the simulation is working as intended and there are no cold solders and you have the…