Hello,
I looked the pinout of the THVD4431 component.
I saw a difference between the THVD4431 datasheet and the evaluation board schematic (THVD4431EVM).
Pin 16 is NC in the datasheet and it is symbolized VIO in the THVD4431EVM schematic. Pin 9 is VIO in the datasheet and it is symbolized VCC in the THVD4431EVM schematic.
What should I do with pin 9 and pin 16?
Thank you in advance for your answer.
Hi Rob,
The datasheet is correct. The EVM originally supported a different pinout for the THVD4431 than what is released now and the pinout change came at the end of the EVM development so both variants of the material ended up being supported - I understand how this can be confusing as this isn't ideal on a board like this. The original schematic symbol for the THVD4431 in EVM files is the old material.
The EVM supports two different pinouts because the original pre-production material for the THVD4431 had a slightly different pinout and some boards may be using original pinout - the EVM user guide does mention this in the jumper table.
Jumpers J28 and J29 can be configured to support the old or new material. Some of the EVM's may have the older material on them - I am not sure which one is on the board you are using - but if you can take a picture of the top of the THVD4431 on the board I should be able to confirm which pinout the device is using. For any production material of the THVD4431 you currently can buy pin 16 is no connect and pin 9 is VIO (as in datasheet).
So please if you can upload a picture of the unit on the EVM so I can verify which version you have - most likely it should be the newest material but there is a possibility you could have had one of the first runs of the board as well.
If you have any other questions please let me know!
Best,
Parker Dodson
