Hi,
We’re performing a short-to-VBUS test with test steps as below.
- Measure the impedance of each pin on type-c connector to GND in the beginning.
- Connect a PD adapter to this type-c port through a breakout board with a valid PD contract.
- Utilizing the breakout board, it allows us to short VBUS to each of these pins one-by-one.
- After the short-to-VBUS test is executed, remove the PD adapter.
- Measure the impedance of each pin on type-c connector to GND compared to the result from step-1.
We found the impedance @ CC2 (pin B5) is changed from ~400kohm to ~50kohm, while there’s no obvious change from the other pins. Since CC2 is directly connected to TPD6S300A, we’d like to know if such impedance value @ 40kohm is a normal value to TPD6S300A or not.
Thanks!
Antony