TPS65988: Schematic check for TPS65988 and HD3SS3202

Yoshifumi Kakimoto

Part Number: TPS65988
Other Parts Discussed in Thread: HD3SS3202,

Hi Team,

Would you share your mailing list for sending email because I would like to ask questions with our confidential information?

Best Regards

over 4 years ago

0 Penny Xu over 4 years ago

TI__Genius 15685 points

Hi Yoshifumi,

I have sent you friendship request. Please accept it and send your schematic through private message. Thanks.

0 Penny Xu over 4 years ago

TI__Genius 15685 points

Hi Yoshifumi,

Please see my comments below.

1. C11 should be 2.2uF min, 4.7uF typ and 6uF max.

2. Recommend adding a bypass cap with 5uF min, 10uF typ.

3. Recommend adding a bypass cap with 47uF typ, 120uF max.

4. Recommend adding 10nF caps on each Vbus pins (A4, B4, A9, B9) at the Type C connector.

Please reach out to the HD3SS3202 group to review that portion. Thanks.

Best regards,

Penny

All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml).

0 Yoshifumi Kakimoto over 4 years ago in reply to Penny Xu

Prodigy 60 points

Hi Penny,

Thank you for your support.
I have a question about 2 and 3.

Where should a bypass cap be connected?
Please tell me the power net name.

Best regards,

0 Penny Xu over 4 years ago in reply to Yoshifumi Kakimoto

TI__Genius 15685 points

Hi Yoshifumi,

Sorry for missing that information in my previous reply,

2. Recommend adding a bypass cap between VIN_3V3 (pin 5 of TPS65988) and ground with 5uF min, 10uF typ.

3. Recommend adding a bypass cap between PP_HV1(pin 11,12) /PP_HV2 (pin 1, 2) and ground with 47uF typ, 120uF max.

0 Yoshifumi Kakimoto over 4 years ago in reply to Penny Xu

Prodigy 60 points

Hi,Penny

Thank you for checking.

I want to reduce the mounting area.

If "Multiport Sink Policy" is set to "Only highest power sink path closes switch",
is it okay to delete the circuit in the blue frame?

Regards

reduce_circuit.pdf

0 Penny Xu over 4 years ago in reply to Yoshifumi Kakimoto

TI__Genius 15685 points

Hi Yoshifumi,

You can simplify the design if your configuration only enables the power path with the highest power PD contract.

Please see this section in datasheet:

Interface

Interface forum

TPS65988: Schematic check for TPS65988 and HD3SS3202