Table 10-3. Dual-Port Notebook Application Design Parameters
DESIGN PARAMETERS EXAMPLE VALUE DIRECTION OF CURRENT
PP_5V0 Input Voltage and Current
Capabilities
5 V, 3 A Sourcing to VBUS
PP_CABLE Input Voltage and Current
Capabilities
5 V, 500 mA Sourcing to VCONN
PP_HV Input Voltage and Current
Capabilities
10-13 V, 3 A Sourcing to VBUS (directly from Battery)
EXT FET Path Voltage and Current
Capabilities
20 V, 3 A Sourcing to VBUS or Sinking from VBUS
VIN_3V3 Voltage and Current Requirements 2.85-3.45 V, 50 mA Internal TPS65982 Circuitry
10.2.2.1.1 Source Power Delivery Profiles for Type-C Ports
Table 10-4 lists the summary of the source PD profiles that are supported for this specific design. PDO 1 and
2 will always be present in the system and will be able to be negotiated without any other system interaction.
When DC barrel Jack voltage is sensed PDO 3 will become available for power delivery negotiation. The
external sense resistor, RSENSE, is configured to only measure the current being sourced by the system. When
operating as a sink of power the input current cannot be measured in this configuration.
Table 10-4. Source USB PD Profiles
PDO POD TYPE VOLTAGE CURRENT OR POWER
EXTERNALLY
DEPENDENT
PDO1 Fixed Supply 5 V 3 A No
PDO2 Battery Power 10 V - 13 V 30 W No
PDO3 Fixed Supply 20 V 3 A Yes
10.2.2.1.2 Sink Power Delivery Profile for Type-C Ports
The two Type-C ports used in this design support Power Delivery and enable charging over a Type-C
connection. Table 10-5 shows the sink profile supported by both of the ports. The reverse current blocking
of the device allows both of the Type-C ports to negotiate a power contract, but it is good system practice for the
System Controller to change the sink profile when a power contract is established. When the DC barrel jack is
connected the TPS65982 is renegotiate the a PD contract to no longer charge of Type C and have the DC Barrel
Jack take precedence when connected.
Table 10-5. Sink USB PD Profile
RDO RDO TYPE VOLTAGE
EXTERNALLY
DEPENDENT
Fixed Supply 20 V 3 A Yes
10.2.2.2 Detailed Design Procedure
The same passive components used in the Fully-Featured USB Type-C and PD Charger Application are also
applicable in this design to support all of the features of the TPS65982. Additional design information is provided
below to explain the connections between the TPS65982 and the system controller and the TPS65982 and the
HD3SS460 SuperSpeed multiplexer.
10.2.2.2.1 TPS65982 and System Controller Interaction
The TPS65982 features two I
2
C slave ports that can be used simultaneously, where the system controller has
the ability to write to either of the I
2
C slave ports. Each I
2
C port has an I
2
C interrupt that will inform the system
controller that a change has happened in the system. This allows the system controller to dynamically budget
power and reconfigures a port’s capabilities dependent on current state of the system. For example, if a battery
power contract is established and the system is running low on battery power the system controller could notify
the TPS65982 to re-negotiate a power contract. The system controller is also used for updating the TPS65982
firmware over I
2
C, where the Operating System loads the Firmware update to the system controller and then the
system controller updates the firmware stored in the SPI Flash memory via I
2
C writes to the TPS65982.
TPS65982
SLVSD02E – MARCH 2015 – REVISED AUGUST 2021
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