BQ25570: Quiescent current measurement conditions

Stefan Lintner

Part Number: BQ25570

Hi Team,

Can you explain to me under which conditions the Iq was measured for BQ25570?
Under electrical characteristics (page 6) it says that VIN_DC is 0V for all Iq typical characteristics.

Can you please explain this?

BR,
Stefan

over 3 years ago

+1 Jeff F over 3 years ago

TI__Guru*** 143870 points

Hi Stefan,

This device's internal circuitry is powered from VSTOR>1.9V not VIN_DC. So, Iq is measured by applying a voltage on VSTOR not VIN_DC.

Regards,

Jeff

0 Stefan Lintner over 3 years ago in reply to Jeff F

TI__Expert 4255 points

Thank you Jeff for your fast reply on this!

One additional question:

What if Vstore=0V, Vbat>=2V, /EN=’0’, how much will it consume? Can I consider also here the 800/900nA? Will this also be taken from the battery, right?

+1 Jeff F over 3 years ago in reply to Stefan Lintner

TI__Guru*** 143870 points

Stefan,

If VBAT>2.1V, the PFET between VSTOR and VBAT turns on so that VBAT can power VSTOR, including the Iq of the charger itself.

Regards,

Jeff

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BQ25570: Quiescent current measurement conditions