SLVUBY2A July   2020  – November 2020

 

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2 TPS25750EVM System Description

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.

GUID-20201029-CA0I-BLKB-FTSD-DBFGRM6W60MZ-low.pngFigure 2-1 TPS25750EVM Block Diagram