9 TPS65988EVM Schematic

Figure 9-1 shows the block diagram of the main components of the TPS65988EVM. The main schematic blocks port A/B control MUX and SS MUX, USB HUB, power paths, power supplies, USB Type-C receptacles, processor, BoosterPack headers, and hardware.

Figure 9-1 TPS65988EVM Block Diagram

Figure 9-2 illustrates the processor block showing the USB Type-C PD controller and contains connections for GPIOs, D+ and D-, CC1 and CC2, HRESET, I²C lines, SPI for flash memory, and ADC1 and ADC2.

Figure 9-2 TPS65988EVM Processor Block

Figure 9-3 shows the power path block, which contains the power portion of the TPS65988 and the required passives. The external power path consists of back-to-back PMOS with RCP circuit. The internal power path is used for sourcing power and the external power path is used for sinking power. The TPS65988 power path can provide power to VBUS or consume power from VBUS.

Figure 9-3 TPS65988EVM Power Path Block

Figure 9-4 shows the power supply block, which has all of the onboard supplies generated and the comparator circuit for barrel-jack detection. There are two variable supplies that generate 5, 9, 15, and 20 V. There are three DC/DC converters that generate 1.2, 3.3, and 5 V. The minimum voltage for SYS_PWR is 5 V; however, this also decreases VBUS maximum power capabilities. When using a lower voltage, the comparator circuit may have to be adjusted to trip at a lower voltage for proper barrel jack detection.

Figure 9-4 TPS65988EVM Power Supply Block

Figure 9-5 shows the DisplayPort Mux used to switch the DisplayPort signals to either USB Type-C Port.

Figure 9-5 TPS65988EVM DisplayPort Mux

Figure 9-6 shows the SS MUX block for port A which connects the DP and USB signals from the DP and USB receptacle. Operating from the system 3.3-V rail, the SS MUX is used for configurations C, D, and E from DisplayPort. Achieve configurations through GPIO or I²C. As the host, the SS MUX is capable of USB 3.1 data rates up to 5 Gbps and DP 1.4 up to 8.1 Gbps with 2 or 4 DP lanes.

Figure 9-6 TPS65988EVM SS MUX Block Port A

Figure 9-7 shows the SS MUX block for port B which connects the DP and USB signals from the DP and USB receptacle. Operating from the system 3.3-V rail, the SS MUX is used for configurations C, D, and E from DisplayPort. Achieve configurations through GPIO or I²C. As the host, the SS MUX is capable of USB 3.1 data rates up to 5 Gbps and DP 1.4 up to 8.1 Gbps with 2 or 4 DP lanes.

Figure 9-7 TPS65988EVM SS MUX Block Port B

Figure 9-8 shows the USB HUB, which contains the connections from the USB source receptacle.

Figure 9-8 TPS65988EVM USB HUB

Figure 9-9 shows the USB Type-C block, which includes the USB Type-C port A and ESD protection.

Figure 9-9 TPS65988EVM USB Type-C™ Port-A Block

Figure 9-10 shows the USB Type-C block, which includes the USB Type-C port B and ESD protection.

Figure 9-10 TPS65988EVM USB Type-C™ Port B Block

Figure 9-11 shows the FTDI block, which contain the connections from the FTDI board.

Figure 9-11 TPS65988EVM FTDI® Connector Block

Figure 9-12 and Figure 9-13 show the current sense block, which contain the sense connections to VBUS and VIN_3V3 for port A and port B.

Figure 9-12 TPS65988EVM Current Sense Block Port A

Figure 9-13 TPS65988EVM Current Sense Block Port B

Figure 9-14 shows the BoosterPack headers block, which contain the connections to the BoosterPack headers.

Figure 9-14 TPS65988EVM BoosterPack Header Block