TPS66021 datasheet(21/38 Pages) TI1

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SLVSEW8 – AUGUST 2019

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Device Functional Modes (continued)

–

(EN1 = 0) or (EN0 = 0). This may allow for exiting a FRS sequence depending on the current status of the

FRS sequence.

•

SRC FAULT state if:

–

PP5V UVLO, PP5V OVP event detected -or-

–

PP5V current limit and PP5V TSD events detected

8.7.2 SRC FAULT State

The SRC FAULT state is entered when any PP5V fault event is detected. Upon entering the SRC FAULT state,

the PP5V power path is disabled. The following transitions are possible from the SRC FAULT state:

•

DISABLED state if:

–

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

–

(EN1 = 0) and (EN0 = 1)

•

SRC 1.5-A state if:

–

(EN1 = 1) and (EN0 = 0) -and-

–

PP5V TSD, PP5V OVP, PP5V RCP, PP5V UVLO, and PP5V current limit events are not detected.

•

SRC 3-A state if:

–

(EN1 = 1) and (EN0 = 1) -and-

–

PP5V TSD, PP5V OVP, PP5V RCP, PP5V UVLO, and PP5V current limit events are not detected.

8.7.3 SNK FAULT State

The SNK FAULT state is entered when any PPHV fault event is detected. Upon entering the SNK FAULT state,

the PPHV power path is disabled. The following transitions are possible from the SNK FAULT state:

•

DISABLED state if:

–

(EN1 = 1) or (EN0 = 0)

•

SNK state if:

–

(EN1 = 0) and (EN0 = 1) -and-

–

PPHV TSD, VBUS OVP (if OVP terminal not grounded) events are not detected

8.7.4 Device Functional Mode Summary

Table 2 summarizes the functional modes for the TPS6602x. As shown, the enabling and disabling of the

respective Source or Sink is dependent upon the voltages present on PP5V and VBUS, as well as, the EN0 and

EN1 control signals.

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