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DS00001760B-page 29

UPD1002

3.3.4.2

PD Consumer Capabilities

The USB PD Consumer capabilities may be selected via the CFG_SEL0 and CFG_SEL1 pins, as defined in Section 3.3,

"Configuration Selection (CFG_SEL0/CFG_SEL1)". Each of the PD Consumer capabilities are detailed below.

VSafe5V-NC (5V@0A)

The Consumer Capability Profile for VSafe5V Non-Consuming indicates to the UPD1002 that this solution must have

only 5 V input sources and must not consume. This is typically used in dual-role ports that offer no capability in their

default role (e.g., a Standard-B Consumer-Provider hub UFP). Additionally, even if not explicitly listed, this capability is

supported by all consumers that support no other 5V capability (per the Power Delivery Specification).

12V@1.5A

The Consumer Capability 12V@1.5A indicates that the UPD1002 must have only 12 V input sources and must have at

least 1.5 A of input current for full-featured operation.

12V@3A

The Consumer Capability 12V@3A indicates that the UPD1002 must have only 12 V input sources and must have at

least 3 A of input current for full-featured operation.

12V@5A

The Consumer Capability 12V@5A indicates that the UPD1002 must have only 12 V input sources and must have at

least 5 A of input current for full-featured operation.

20V@3A

The Consumer Capability 20V@3A indicates that the UPD1002 must have only 20 V input sources and must have at

least 3 A of input current for full-featured operation.

20V@5A

The Consumer Capability 20V@5A indicates that the UPD1002 must have only 20 V input sources and must have at

least 5 A of input current for full-featured operation.

3.4

Voltage/Current Monitors (VMON/IMON)

3.4.1

VMON

The integrated voltage monitor utilizes the VMON pin to read a stepped down voltage representation of the VBUS volt-

age. This pin must be connected to a voltage divider circuit as specified in Section 2.4, "Power Connection Diagram,"

on page 22. The device monitors the VBUS voltage as a provider to manage the behavior of the power supply, detecting

power supply transitions and over/under-voltage conditions.

The device also monitors the VBUS voltage as a consumer for the following purposes:

• To verify the source provided voltage is within range after reception of the PS_RDY message and before asserting

the PD_GOOD signal.

• To monitor for occurrence of overvoltage or undervoltage exception conditions for the negotiated contract, upon

which PD_GOOD will be de-asserted.

3.4.1.1

Power Supply Transitions

Using VMON, the device monitors the voltage on VBUS to manage the transitions of the supply output. The supply

power-on and power-off transitions are determined to be at their final states when reaching predefined voltage thresh-

olds, as detailed in Table 3-4. The power-on threshold indicates when the supply has reached the defined voltage. The

power-off threshold indicates when the supply output is discharged. All voltage transitions are bound by an internal

timer. If the voltage transition times out, the FAULT_N pin will be asserted until the power transition is successfully com-

pleted.

TABLE 3-4:

VMON POWER-ON/OFF TRANSITION THRESHOLDS

Voltage Threshold (V)

Min.

Typical

Max

Power-On

-3-

Power-Off

-2-