1. Below jpg ----- The DOCK TPS65988DDJ Power on >> connect to USB Type C cable to Lenovo T480 NB ----The CC Handshake and PD is Good .
2. If USB Type C Cable connect to T480 NB first, then turn on the DOCK Power (TPS65988DDJ power on ) ---- The CC Keep 1.2x voltage , and handshake file PD Source voltage is not success. below as jpe
Below as question :
1. TPS65988DDJ have dead battery function ?
2. Try the TPS65988DDH Chip , test is good on the T480 NB not find the same issue, but the FW is different.
Note : TPS65988DDJ user tool 6.2.3 version ; the FW TPS65987_88_F807_12_37 and TPS65987_88_F807_12_50 version both the same on the issue .
So please help analyze and discuss this issue. How to solve it. Update FW?
