BQ78350: Does bq78350 support refuse unauthorised charging?

user5108889

Prodigy 30 points

Part Number: BQ78350

We sell batterys and charger and need to prohibit charging with thirdparty charger.Does bq78350 have this feature?

over 5 years ago

0 Matt Sunna over 5 years ago

TI__Guru* 81035 points

Hi,

The BQ78350-R1A does have an authentication feature. I think this is typically used by the system or the charger to prevent using third party battery packs, but you may be able to use the same feature to prevent using a third-party charger.

This is described in the Device Security section of the Technical Reference Manual.

Best regards,

Matt

0 user5108889 over 5 years ago in reply to Matt Sunna

Prodigy 30 points

After some digging,I can use 0x2B HostFETControl SBS CMD to control CHGFET according to reference manual.But there is a problem that CHGFET is on as default，so if cable is unpluged while charging，no way to send close cmd.I did not find CHGFET could be set off as defualt.

0 Matt Sunna over 5 years ago in reply to user5108889

TI__Guru* 81035 points

You may be able to use the PRES pin for this purpose. It is described in Chapter 6 of the BQ78350-R1A Technical Reference Manual.

Regards,

Matt

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BQ78350: Does bq78350 support refuse unauthorised charging?