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DS00001759B-page 25

UPD1001

Peak Power-Capable Setting 0b11 - 200% (PP-200)

The Peak Power-Capable 200% indicates that the UPD1001 supports providing 200% of the current limit for a 1 ms time

duration at 5% duty cycle. This will add the correct 0b11 bits to the PDO.

3.3.4.2

PD Consumer Capabilities

AC adapters are not intended to be Consumers. However, a need exists for Standard-B receptacle (Consumer/Provider)

AC adapters for powering notebooks through their PD enabled Standard-A host ports. The Power Delivery Specification

requires any consumer port to at least support VSafe5V, so a minimal non-consuming capability is defined (VSafe5V-

NC).

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 UPD1001 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 AC adapter port).

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 18. 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.

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.

3.4.1.2

Overvoltage Condition

Using VMON, the device monitors the voltage on VBUS to detect an overvoltage condition on the supply output. The

overvoltage condition is determined when the predefined overvoltage threshold is crossed, as detailed in Table 3-5.

On the occurrence of the overvoltage condition:

• The supply output will turned off and discharged.

•The FAULT_N pin will be strobed approximately every 500ms.

• If more than 3 consecutive exceptions occur within a 4 second period, FAULT_N will be strobed approximately

every 5 seconds.

TABLE 3-4:

VMON POWER-ON/OFF TRANSITION THRESHOLDS

Voltage Threshold (V)

Min.

Typical

Max

Power-On

-3-

Power-Off

-2-