TUSB2E11: BC1.2 implementation

Hi Fred,

BC 1.2 is supported through the USB lines.  Here is a video that explains BC 1.2 in general: What is USB BC 1.2? | Video | TI.com

I'm not an expert in USB power. I would recommend you ask the appropriate team about how to design the USB power switch.

That being said, it seems like you can look at charging port controller to regulate the current on Vbus.

USB power switches & charging port controllers product selection | TI.com

Regards,

Nicholaus

Hi Nichiloaus,

is there any hardware pin at TUSB2E11 can deliver the status of BC1.2  instead of using I2C?

if BC1.2 is our advantage, I would  want to create a new system solution for customer to save the cost for extra BC1.2 switch like TP2546..

Hi Fred,

There is not a GPIO pin that reports the status of BC 1.2, but I'm not sure how it would save costs for the customer.  What is the solution?

The TUSB2E11 can control a VBUS switch with GPIO0, but it seems that a switch will be required in either case.

Regards,

Nicholaus

Hi Nicholaus ,

the switch without BC1.2 function like TPS25221 will be much cheaper than TPS2546 since our redriver already support it

so either GPIO0 or BC1.2 status all need to go through I2C, right?

Hi Fred,

I see.  Yes, charger status is done reported through I2C.  If there is an MCU in the design maybe you can check the TUSB2E11 BC 1.2 status, and control the switch through the MCU?

Regards,

Nicholaus

Hi Nicholaus,

yes, that’s exactly what I though,

will check with SOC, thanks

Alright sounds good.  Let me know what you find.

Thanks,

Nicholaus

Hi Fred, 

What customer and project is this for?

Regards,

Nicholaus