This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: HD3SS3220
When my customer connected HD3SS3220 to PC with USB C - A cable in the condition of IC's power off, they found that there is 0.1V of voltage leakage to VDD_5V. As the datasheet described, they supplied VBUS and VDD_5V separately. So, customer think the voltage is leaked from CC pin. Is there any point that might leak the voltage to VDD_5V?
when VDD_5v is off, are there any pin still has voltage? this will back drive the device.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Brian Zhou:
I asked customer to check the voltage of other pins.
I will get back to you once I get information from customer.
In reply to Takahiro Saito:
Customer saw some voltages on following pins.
No. pin Name voltage Circuit connection
1 CC2 0.15 V USB Type-C Con.2 CC1 0.96 V USB Type-C Con.5 VBUS_DET 0.48 V VBUS 888k PU29 ENN_CC 0.37 V OPEN30 VDD5 0.41 V OPEN
Could you give me your comments which pins leak the voltage to VDD5 pin?
Does VDD3 off too? can they send schematic to us?
Yes, Both of VDD5 and VCC are off. Also, CC pin shows 5.1kohm. So, the device entered the dead battery mode.
Could you give me your comment where the voltage leaks to the VDD5 pin?
The below is the pin voltage and the connection for HD3SS3220.
It looks CC1 and VBUS_DET has relatively higher voltage than other pins.
Do you think these pins are leakage source to the VDD5 pin?
No. pin Name voltage circuit connection
1 CC2 0.15 V USB Type-C Con.2 CC1 0.96 V USB Type-C Con.3 CURRENT_MODE 0.01 V OPEN4 PORT 0.00 V GND 4.7k PD5 VBUS_DET 0.48 V VBUS 888k PU8 VCC33 0.02 V OPEN11 DIR 0.00 V VCC33 220k PU12 ENN_MUX 0.03 V OPEN22 ADDR Not measured OPEN23 INT_N/OUT3 Not measured OPEN24 VCONN_FAULT_N 0.01 V OPEN25 SDA/OUT1 0.01 V OPEN26 SCL/OUT2 0.01 V OPEN27 ID 0.01 V OPEN29 ENN_CC 0.37 V OPEN30 VDD5 0.41 V OPEN
did they connect VDD5 and VBUS det to Vbus? can we see their schematic?
VDD5 is not connected to VBUS. But, VBUS_det is connected to VBUS with 888kohm resistor.
I will ask customer to provide the schematic to us. But, I appriciate if you could use the circuit connection I showed in last thread instead of schematic.
I have an additional inforimation on this. It depends on the USB-C plug orientation whether the leakage voltage on VDD5 happens or not.
If the cable orientation which CC1 has a voltage, the leakage voltage is showed up on VDD5. But, if the other orientation, there is no leakage on VDD5.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.