BQ25708: Boost ripple formula

Moritz Augsburger1

Part Number: BQ25708
Other Parts Discussed in Thread: BQ25710

Hi,

I'm confused by the formula given on P. 70 for Buck Mode:

Shouldn't this be I_ripple,boost = Vin * D / ( fs * L ), like given on P. 6 of http://www.ti.com/lit/an/slva372c/slva372c.pdf

Best regards,
Moritz

0 Shishuo Zhao over 5 years ago

Hi Moritz,

Good catch, this is a typo. We will update data sheet for next release. The correct is :

Iripple_boost=Dboost*VBAT/(Fs*Lboost)

Regards

Shishuo

0 Moritz Augsburger1 over 5 years ago in reply to Shishuo Zhao

In the BQ25710 datasheet the formula is completely missing (P. 70)

Perhaps you should check all datasheets of this family?

Best regards and Thanks
Moritz

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