Heat output of RLimit of STEF01FTR (eFuse)

Forum|Forum|1 year ago
February 2, 2025
2 replies
452 views

If the resistance value of RLimit is set to 14Ω to 22Ω, how do you calculate the heat generation of the resistor?
Is 0.1W OK for other resistors?
Also, can you provide the BOM for the evaluation board (STEVAL-EFUSE01)?

Power supply management

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Best answer by Peter BENSCH

Welcome @j_matsuda, to the community!

The sense FET of the STEF01FTR led out at pin I-LIMIT only carries a very small part of the current from the main MOSFET (Vout), so that a design with 100mW is sufficient for Rlimit ≥ 14 Ohm.

The BOM of STEVAL-EFUSE01 can be found in the CAD Resources tab of its product website.

Does it answer your questions?

Regards
/Peter

Peter BENSCHBest answer

ST Technical Moderator

Welcome @j_matsuda, to the community!

The sense FET of the STEF01FTR led out at pin I-LIMIT only carries a very small part of the current from the main MOSFET (Vout), so that a design with 100mW is sufficient for Rlimit ≥ 14 Ohm.

The BOM of STEVAL-EFUSE01 can be found in the CAD Resources tab of its product website.

Does it answer your questions?

Regards
/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

J

j_matsudaAuthor

Associate

Thank you for your response regarding the amount of heat generated by RLimit.
I was also able to obtain the BOM for the evaluation board.

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