TPS25750: USB BC 1.2 DCP/SDP Enumeration

Ambroise Suter

Expert 4110 points

Part Number: TPS25750

Hello,

We are working on a USB-C battery-bank with the BQ2579x and need to support BC 1.2 as well as USB-PD.

can the TPS25750 support DCP/SDP and Enumeration?

Thank you and best regards,

Ambroise

over 2 years ago

0 Raymond Lin over 2 years ago

TI__Mastermind 34256 points

Hi Ambroise,

Yes the TPS25750 does support BC1.2 and can emulate and detect legacy chargers. The settings can be found in register 0x29 (Port Control) of the TPS25750 and by default, both ChargerDetectEnable/ChargerAdvertiseEnable are set to 00b/0h respectively. User will need to manually write to register 0x29 and change these two settings every time when PD starts up.

Thanks and Regards,

Raymond Lin

0 Ambroise Suter over 2 years ago in reply to Raymond Lin

TI__Expert 4110 points

Hello Raymond,

Does the TPS25750 also support enumeration according to bc 1.2 standard?

Thank you and best regards,

Ambroise

0 Raymond Lin over 2 years ago in reply to Ambroise Suter

TI__Mastermind 34256 points

Hi Ambroise,

Let me double check internally but I believe the TPS25750 follows BC1.2 standard when set to detect legacy and BC1.2 chargers and for emulating a BC1.2 charger as well as shown in the screenshot from the previous message. Let me get back to you tomorrow!

Thanks and Regards,
Raymond Lin

+1 Raymond Lin over 2 years ago in reply to Ambroise Suter

TI__Mastermind 34256 points

Hi Ambroise,

TPS25750 supported enumeration according to BC1.2 standard. Please refer to the TRM, register 0x29 for types of charger enumeration available.

Thanks and Regards,
Raymond Lin

Power management

Power management forum

TPS25750: USB BC 1.2 DCP/SDP Enumeration