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LM5176: Current limit in Buck-Boost Mode

tateo yamashiro
Guru 10890 points

Part Number: LM5176

Hi,

We got a question from the customer about LM5176.
Could you help us?

[Question]
How does the current limit function work in buck-boost mode? I evaluated this by EVM. Please refer to the attached file for detail. It seems the IC protect against over current by Vcs(buck). We would like to make sure whether both Ics(buck) and Ics(boost) are active in buck-boost mode or not.

8640.LM5176 Hiccup Behavior_Aug2218.pptx

Best Regards,
tateo