The TPS25810 is a USB Type-C Downstream Facing Port (DFP) controller with an integrated3-A rated USB power switch. The TPS25810 monitors the Type-C Configuration Channel (CC) lines todetermine when an USB device is attached. If an Upstream Facing Port (UFP) device is attached, theTPS25810 applies power to VBUS and communicates the selectableVBUS current sourcing capability to the UFP via the passthrough CC line. Ifthe UFP is attached using an electronically marked cable, the TPS25810 also appliesVCONN power to the cable CC pin. The TPS25810 also identifies when Type-Caudio or debug accessories are attached.
The TPS25810 draws less than 0.7 uA (typ) when no device is attached. Additional systempower saving is achievable in S4/S5 system power states by using the UFPoutput to disable the high power 5-V supply when no UFP is attached. In this mode the device iscapable of running from an auxiliary supply (AUX) which can be a lower voltage supply (3.3 V),typically powering the system uC in low power states (S4/S5).
The TPS25810 34-mΩ power switch has two selectable fixed current limits that align withthe Type-C current levels. The FAULT output signals when the switch is in anover current or over temperature condition. The LD_DET output controls powermanagement to multiple high current Type-C ports in an environment where all ports cannotsimultaneously provide high current (3 A).