- The TPS25750D requires 5V on PP5V in order to source 5V and for VCONN support. In the design of the board, we decided to supply the PP5V rail from a 5V buck converter. If a battery voltage less than or close to 5V were applied, the buck converter would not guarantee 5V and not be able to source 5V for OTG.
- The USB-PD-CHG-EVM-01 can be operated in a 1s battery configuration in Sink Only Mode Only. If the sourcing capability is not needed, then a 1s battery is possible. Follow the below instructions:
- Power on the USB-PD-CHG-EVM-01
- Change the CELL bits to 1s
- The ICHG, VSYSMIN, and VREG will change to reflect the values in Table 9-2
- Update the ICHG, VSYSMIN, and VREG values to the desired parameters
- The values in Table 9-2 will be updated if the device encounters REG_RST or the watchdog timer expires