TPS2546: mode change behavior TPS2546 v.s. TPS2547

Hironori Yoshimura

Part Number: TPS2546
Other Parts Discussed in Thread: TPS2547,

My customer has issue by TPS2547 during Transition from BC1.2 or Apple mode connection
--> then if difference TPS2547 disconnect VBUS -> then reconnect again.
From the user point of view, Charge rump is one shot turn off. So Can you check This behavior will not happen on the TPS2546 or another devices?
I would like to promote TPS2546 instead of TPS2547. Do you think TPS2546 do not turn off during power swap?
If TPS2546 do not work well, Do you have alternative proposal?

Best Regards,
Hironori Yoshimura

over 4 years ago

0 Emma Hoying over 4 years ago

TI__Genius 9630 points

Hi Hironori-san,

Are you referring to the VBUS discharge if the charging mode changes? If so, this is inherent to device behavior in both the TPS2546 and the TPS2547.

Thanks,

Emma

0 Hironori Yoshimura over 4 years ago in reply to Emma Hoying

TI__Intellectual 1850 points

Both devices datasheet show Dataswitchesare OFFduringOUT(VBUS)discharge. This is negative impact to my customer's application.
Do you Have alternative solution to avoid LED off during transition or proposed circuit by our device?

0 Emma Hoying over 4 years ago in reply to Hironori Yoshimura

TI__Genius 9630 points

Hi Hironori-san,

The VBUS discharge does not occur in certain modes. What mode are you trying to charge in?

Regards,

Emma

0 Hironori Yoshimura over 4 years ago in reply to Emma Hoying

TI__Intellectual 1850 points

I confirmed datasheet show not hot switching. Thanks.

Power management

Power management forum

TPS2546: mode change behavior TPS2546 v.s. TPS2547