BQ40Z80: About BQ40Z80 FUSE function setting problem

zhang jianhang

Part Number: BQ40Z80

HI TI experts

Can you help me analyze which settings cause the FUSE pin to output a voltage of about 0.34V? I am afraid that it will cause false triggering of my secondary protection circuit, thank you.BQ40Z80 FUSE Pin 2021-12-14.gg.csv

over 3 years ago

0 Wyatt Keller over 3 years ago

TI__Guru** 105770 points

Hello Zhang,

The fuse pin cannot be partially triggered from the settings, it will either be active or not active. 0.34V should not be high enough to trigger secondary protections.

Sincerely,

Wyatt Keller

0 zhang jianhang over 3 years ago in reply to Wyatt Keller

Prodigy 130 points

Hi Wyatt,

Thank you for your answer.

The strange thing is that the setting of this project causes the FUSE pin to output a voltage of 0.34V, but in other projects, the FUSE pin outputs 0V, so I want to know which Data Memory setting causes 0.34V output. I can avoid it as much as possible.
You mean 0.34V will not cause false triggering, so I don't care about it?

0 Wyatt Keller over 3 years ago in reply to zhang jianhang

TI__Guru** 105770 points

Hello Zhang,

It doesn't look like it is the gauge, maybe some external circuitry differences from the other project or your secondary protection. The gauge will trigger output high to 6-8V.

Sincerely,

Wyatt Keller

0 zhang jianhang over 3 years ago in reply to Wyatt Keller

Prodigy 130 points

Hi Wyatt,

Okay thank you. I look for other differences in the circuit.

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BQ40Z80: About BQ40Z80 FUSE function setting problem