BQ25710: Buck-boost transition threshold

Koyo Asaishi

Intellectual 1960 points

Part Number: BQ25710

Tool/software:

Hi team,

I want to know when BQ25710 move from Buck to Buck-boost and Buck-boost to Boost vice versa.
Competitor's charger depict visible image like Vin=90%*Vsys is the transition timing Boost to Buck-boost etc. It is fine if you fill out following table.

	Threshold
Boost to Buck-boost	(e.g. Vin=??*Vsys)
Buck-boost to Buck
Buck to Buck-boost
Buck-boost to Boost

Best regards
koyo

4 days ago

0 Tiger Zhou 3 days ago

TI__Mastermind 33015 points

Hi, Koyo,

I don't recall we have seen such a threshold. Let me check with team.

Regards,

Tiger

0 Koyo Asaishi 1 day ago in reply to Tiger Zhou

TI__Intellectual 1960 points

Hi Tiger,

Please help to share it as soon as possible. Based on my testing on the EVM, it would be like below. But I don't know if this is true.

	Threshold
Boost to buck-boost	95%
Buck-boost to buck	115%
Buck to buck-boost	110%
Buck-boost to boost	95%

Vsys=12.56V, Isys=1A

Best regards
Koyo

+1 Tiger Zhou 1 day ago in reply to Koyo Asaishi

TI__Mastermind 33015 points

Hi, Koyo,

Thanks for the test data. It is pretty good. Here is my test data.

Threshold
Boost to buck-boost	95%
Buck-boost to buck	108%
Buck to buck-boost	108%
Buck-boost to boost	95%

Regards,

Tiger

0 Koyo Asaishi 1 day ago in reply to Tiger Zhou

TI__Intellectual 1960 points

Hi Tiger,

Thanks. Don't you have the typical spec value?
If you don't have I will rely on your test data.

Best regards
Koyo

0 Tiger Zhou 15 hours ago in reply to Koyo Asaishi

TI__Mastermind 33015 points

Hi, Koyo,

You can use that as a typical value.

Regards,

Tiger

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BQ25710: Buck-boost transition threshold