The TPS65983B is a stand-alone USB Type-C and Power
Delivery (PD) controller providing cable plug and orientation detection at the USB Type-C
connector. Upon cable detection, the TPS65983B communicates on the CC
wire using the USB PD protocol. When cable detection and USB PD negotiation are complete, the
TPS65983B enables the appropriate power path and configures alternate
mode settings for internal and (optional) external multiplexers.
The mixed-signal front end on the CC pins advertises default (500 mA), 1.5 A or 3 A for
Type-C power sources, detects a plug event and determines the USB Type-C cable orientation, and
autonomously negotiates USB PD contracts by adhering to the specified bi-phase marked coding (BMC)
and physical layer (PHY) protocol.
The port power switch provides up to 3 A downstream at 5 V for legacy and Type-C USB
power. An additional bidirectional switch path provides USB PD power up to 3 A at a maximum of 20 V
as either a source (host), sink (device), or source-sink.
The TPS65983B is also an Upstream-Facing Port (UFP),
Downstream-Facing Port (DFP), or Dual-Role Port for data. The port data multiplexer passes data to
or from the top or bottom D+/D– signal pair at the port for USB 2.0 HS and has a USB 2.0 Low Speed
Endpoint. Additionally, the Sideband-Use (SBU) signal pair is used for auxiliary or Alternate Modes
of communication (DisplayPort or Thunderbolt, for example).
The power management circuitry uses a 3.3 V inside the system and also uses VBUS to start
up and negotiate power for a dead-battery or no-battery condition.
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