The figure below shows Dual Port Thunderbolt Notebook application. The TPS65988 is capable of managing two full featured Type-C and PD ports supporting USB, DisplayPort, Thunderbolt and PD charging. When the TPS65988 detects a connection on a Type-C port it will generate an interrupt to the Thunderbolt controller to generate the appropriate data output. The TPS65988’s two internal power paths provide VBUS which is taken from the System 5 V for Port and will control the external sink path to charge the system through USB PD. The System 5 V will also power PP_CABLE1/2 on the TPS65988 to supply VCONN to Type-C e-marked cables and Type-C accessories. An embedded controller EC is used to communicate to the TPS65988 for additional control and to relay information back to the operating system. An embedded controller can control additional features such as entering and exiting sleep modes, changing source and sink capabilities depending on the state of the battery, UCSI support, control alternate modes, etc. Refer to the Host Interface and Firmware users guide for additional information.

Figure 9-7 TBT Notebook with PD Charging