ULC1001-DRV2911EVM: suggest small size boost solution

If we have sync Boost which includes MOSFET and don't need to place diode externally, that would be great for customer. Thanks a lot!

Thanks for reaching out. For sync boost selection, maybe it is better reach out to the LM5155 team. 6.8uH is a default selection, which enables a maximum of ~9.3A current support. If the customer's load requires a much smaller current, the inductor value and size can be adjusted accordingly. Section 3.2 of the app note below describes the inductor selection.  https://www.ti.com/lit/an/snva824/snva824.pdf?ts=1745896279814&ref_url=https%253A%252F%252Fwww.google.com%252F

Hello Hailong,

Is that possible to transfer this thread to BCC team's member? May I know if 9.8A is the peak current DRV2911 needs? Or how do we design the VBST? Thanks!

Best regards,

Ann Lien

Ann, I am not the moderator so I won't be able to transfer it. It might be easier you submit the same question to the BCC team, so that it will be automatically assigned to the team.  DRV2911 doesn't need the high current. The current is decided by the load (piezo). Vbst set at ~30V is recommended for most loads.  

Hello Hailong,

May I know if the load from ULC1001-DRV2911EVM design for current capability on VBST? Thanks!

Best regards,

Ann Lien