TPS25751D datasheet(45/89 Pages) TI1

45 / 89 page

Table 8-6. Device Configuration using ADCIN1 and ADCIN2

ADCIN1 DECODED

VALUE(2)

ADCIN2 DECODED

VALUE(2)

I2C ADDRESS

INDEX(1)

DEAD BATTERY CONFIGURATION

AlwaysEnableSink: The device always enables the sink path

regardless of the amount of current the attached source is

offering. USB PD is disabled until configuration is loaded.

NegotiateHighVoltage: The device always enables the sink path

during the initial implicit contract regardless of the amount of

current the attached source is offering. The PD controller enters

the 'APP ' mode, enable USB PD PHY and negotiate a contract

for the highest power contract that is offered up to 20 V. The

configuration cannot be used when a patch is loaded from

EEPROM. This option is not recommended for systems that can

boot from 5 V.

SafeMode: The device does not enable the sink path. USB

PD is disabled until configuration is loaded. Note that the

configuration can put the device into a source-only mode. This

is recommended when the application loads the patch from

EEPROM.

(1)

See Table 8-5 to see the exact meaning of I2C Address Index.

(2)

See Table 8-2 for how to configure a given ADCINx decoded value.

8.4.2 Power States

The TPS25751 can operate in one of three different power states: Active, Idle, or Sleep. The Modern Standby

mode is a special case of the Idle mode. The functionality available in each state is summarized in Table

8-7. The device automatically transitions between the three power states based on the circuits that are active

and required. See Figure 8-33. In the Sleep state, the TPS25751 detects a Type-C connection. Transitioning

between the Active mode to Idle mode requires a period of time (T) without any of the following activity:

• Incoming USB PD message

• Change in CC status

• GPIO input event

• I2C transactions

• Voltage alert

• Fault alert

Sleep State

No CC connection

Active State

Idle State

CC connected

New

activity

CC detached & No activity for T

CC attached &

No new activity for T

New activity

Figure 8-33. Flow Diagram for Power States

Table 8-7. Power Consumption States

ACTIVE

SOURCE

MODE(1)

ACTIVE SINK

MODE5

IDLE SOURCE

MODE

IDLE SINK

MODE

MODERN

STANDBY

SOURCE

MODE3

MODERN

STANDBY

SINK MODE4

SLEEP MODE2

PP_5V

enabled

disabled

enabled

disabled

enabled

disabled

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TPS25751

SLVSH93 – OCTOBER 2023

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