BQ24295: How to share USB DP & DM line with battery charger & Application processor

saravanan krishnan1

Part Number: BQ24295

Hello,

We need to design Hotpot with power bank feature.The BQ24295 seems OK for Li-ion Battery charger +charge power Bank in Boost mode.

I need to share DP DM line of USB to my Application processor also.

It is possible to share USB DP ,DM line (BQ24295 + application processor) pls clarify.

Regards,

K.Saravanan

0 Ning T over 6 years ago

K.Saravanan,

When D+/D- lines are shared:

1.AP must be able to HIZ D+/D- for the first second when VBUS power is applied in order for BQ2419x to drive D+/D-

2. BQ2419x will HIZ D+/D- after the first second when VBUS power is applied when DCP is not detected to allow AP to drive D+/D- for USB communication

If AP is unable to HIZ D+/D- lines when needed, USB switch should be used.

Thanks,

Ning.

0 saravanan krishnan1 over 6 years ago

Hello Ning,

Thanks for your timely reply .Pls clarify the mentioned criteria are applicable to BQ24295 also?

Regards,

K.Saravanan

0 saravanan krishnan1 over 6 years ago in reply to saravanan krishnan1

Hello Ning,

Can you name any TI part for USB switch.

Regards,

K.Saravanan

0 Ning T over 6 years ago in reply to saravanan krishnan1

K.Saravanan,

Yes, it applies to BQ2429x.

This is charger support. Please submit separate thread for USB switch.

Thanks,

Ning

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