DISABLED

SRC

3.0A

SRC

1.5A

SNK

FRS

EN1_EN0 = 01b

EN1_EN0 = 00b

EN1 = 1b

EN1_EN0 = 00b, 01b

EN1_EN0 = 10b

EN1_EN0 = 11b

EN1_EN0 = 10b

EN1_EN0 = 00b, 01b

EN1_EN0 = 00b, 11b

EN1_EN0 = 10b

EN1_EN0 = 01b

EN1_EN0 = 11b

EN1 = 0b or EN0 = 0b

EN1_EN0 = 11b

SRC

FAULT

EN1_EN0 = 00b, 01b

EN1_EN0 = 10b

& no faults

EN1_EN0 = 11b

& no faults

fault

fault

SNK

FAULT

EN1_EN0 = 01b

& no faults

fault

Power-on Reset

fault

VBUS < VSAFE5V

EN1_EN0 = 00b, 10b, 11b

19

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8.7 Device Functional Modes

8.7.1 Device Functional Modes and State Transitions

8.7.1.1 State Transitions

EN0 and EN1 are used by the application to control the state of the device. Figure 10 shows the supported state

transitions.

Figure 10. TPS6602x Functional State Diagram

8.7.1.1.1

DISABLED State

In the DISABLED state, EN1 = 0, EN0 = 0. While in the DISABLED state:

•

PP5V power path is disabled

•

PP5V current limit, overvoltage, overtemperature, and reverse current protections are disabled

•

PPHV power path is disabled

•

PPHV overtemperature, reverse-current, and VBUS overvoltage protections are disabled

•

VIN and VBUS undervoltage lockout are enabled

The following transitions are possible from the DISABLED state:

•

SRC 1.5-A state if (EN1 = 1) and (EN0 = 0) and (PP5V UVLO event not detected) and (PPHV path is

completely off)

•

SRC 3.0-A state if (EN1 = 1) and (EN0 = 1) and (PP5V UVLO event not detected) and (PPHV path is

completely off)

•

SNK state if (EN1 = 0) and (EN0 = 1) and (VBUS UVLO event not detected) and (PP5V is completely off)

8.7.1.1.2

SRC 1.5-A State

In the SRC 1.5-A state, EN1 = 1, EN0 = 0. While in the SRC 1.5-A state:

•

•

PP5V overvoltage, overtemperature and reverse current protections are enabled

•

PPHV power path is disabled

•

PPHV overtemperature, reverse-current and VBUS overvoltage protections are disabled

•

VIN and PP5V undervoltage lockout are enabled

The following transitions are possible from the SRC 1.5-A state:

•

SRC 3-A state if (EN1 = 1) and (EN0 = 1)

•

DISABLED state if:

–

(EN1 = 0) and (EN0 = 0) -or-