TIDA-050047: BC1.2

Yoshinobu Kagawa

Part Number: TIDA-050047
Other Parts Discussed in Thread: TPS25750, BQ25792

Could you please tell me how to support BC1.2 when using the communication function with USB2.0 Device? (How to use without connecting D+/D- input pins of each IC)
If there are any problems or issues with the system configuration when BC is not applied, please let us know.

Regards,
Kagawa

over 1 year ago

0 Alan Manlick over 1 year ago

TI__Prodigy 460 points

Hi Kagawa,

Thank you for your inquiry. I will look into this and get back to you soon.

Regards,

Alan

0 Chuck Branch over 1 year ago in reply to Alan Manlick

TI__Mastermind 25810 points

Kagawa,

Both the BQ25792 and the TPS25750 have some BC1.2 support available. In this system, we suggest that you connect the D+/D- lines to the TPS25750 which supports BC1.2 negotiation.

If you have the need to work with data, it is possible to route a USB2.0 connection through the TPS25750 with a Stub and still meet signal inegrity requirements for High Speed USB.

Regards,

Chuck

0 Yoshinobu Kagawa over 1 year ago in reply to Chuck Branch

Expert 1810 points

Hi Chuck-san,

Can you please tell me specifically what the harm is if I do not connect the D+/D- line to the TPS25750?

Regards,
Kagawa

0 Chuck Branch over 1 year ago in reply to Yoshinobu Kagawa

TI__Mastermind 25810 points

Kagawa,

There is no need to connect the D+/D- lines for the TPS25750.

The only functionality that would be lost is the ability to use a legacy typeA to Type C cable to allow for legacy charger detection. This is not a required feature for the type C port.

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TIDA-050047: BC1.2