All trademarks are the property of their respective owners.
The following items are required to use the TPS25750EVM:
TPS25750D data sheet
TPS25750EVM
TPS25750 Application Customization Tool
20-V barrel jack adapter or DC power supply
USB Type-C cables
USB Type-A to USB Mirco-B cable
Notebook with a USB port
The TPS25750EVM is an evaluation board used to evaluate the TPS25750 which is a single-port USB Type-C PD controller with integrated power paths. The TPS25750EVM is powered by a 20-V DC barrel jack. If this type of barrel jack is not available, the board can also be powered from an external bench supply connected to the SYS_PWR test point (TP4), with the bench supply providing 20 V. The TPS51225 provides the 3.3 V needed for powering the TPS25750 as well as the TM4C123GH, or the Tiva, and the 5-V supply is connected to the internal 5-V source power path for the TPS25750.
The TPS25750D incorporates two internal power paths; one 5-V source only power path and one high voltage bi-directional power path. The TPS51225 connects to PP5V, and the BQ25731 connects to PPHV, the internal high voltage bi-directional power path. Configuring this power path to act as a source or sink is explained in further detail later in this user’s guide. The TM4C123GH is used to program the external flash connected to the TPS25750. The TM4C123GH converts the USB2.0 data sent over the micro-b connector to I2C, programming the external flash, which the TPS25750 will load during the next power cycle. Programming the TPS25750 is explained in further detail later in this user’s guide.
The TPS25750EVM comes with an integrated battery charging solution using a BQ25731 buck/boost charger. The charger allows the EVM to operate as a source or sink from 5 to 20 volts at up to 3 amps. When acting as a sink, the TPS25750 negotiated the appropriate PD contract and enables the PPHV power path supplying power to the BQ. The BQ will then buck or boost the voltage to ensure the output is 12 volts (charging a 3S battery). When acting as a source, the BQ is powered by the barrel jack through the TPS56637 buck converter which simulates a 3S battery connection. The BQ will then buck or boost the 12 volts supplied from the TPS56637 to the desired output voltage which was negotiated in the PD contract.