STUSB1600 datasheet(19/69 Pages) STMICROELECTRONICS

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STUSB1600

Features description

3.4

Low power standby mode

The STUSB1600 proposes a standby mode to reduce the device power consumption when

no device is connected to the USB Type-C port. It is disabled by default and can be

activated through NVM programming (see Section 6: Start-up configuration).

When activated, the STUSB1600 enters standby mode at power up, after a reset, or after a

disconnection. In this mode, the CC interface and the voltages monitoring blocks are turned

off. Only a monitoring circuitry is maintained active on the CC pins to detect a connection.

When the connection is detected, all the internal circuits are turned on to allow normal

operation.

Standby mode does not operate when the device is configured in sink power role with

accessory support (see Section 6: Start-up configuration).

Table 9. Fault management conditions

Fault types

Fault conditions

Expected actions

Short circuit

CC output pin shorted to ground via

very low resistive path causing

rapid current surge

Power switch limits the current and reduces

the output voltage. I2C alert is asserted

immediately thanks to

VCONN_SW_OCP_FAULT bits.

Overcurrent

CC output pin connected to a load

that sinks current above

programmed limit

Power switch limits the current and reduces

the output voltage. I2C alert is asserted

immediately thanks to

VCONN_SW_OCP_FAULT bits.

Overheating

Junction temperature exceeding

145 °C due to any reason

Power switch is disabled immediately until

the temperature falls below 145 °C minus

hysteresis of 15 °C. I2C alert is asserted

immediately thanks to THERMAL_FAULT

bit. STUSB1600 goes into transient error

recovery state.

Undervoltage

VCONN input voltage drops below

UVLO threshold minus hysteresis

Power switch is disabled immediately until

the input voltage rises above the UVLO

threshold. I2C alert is asserted immediately

thanks to VCONN_PRESENCE bit.

Overvoltage

CC output pin voltage exceeds

maximum operating limit of 6.0 V

Power switch is opened immediately until

the voltage falls below the voltage limit. I2C

alert is asserted immediately thanks to

VCONN_SW_OVP_FAULT bits.

Reverse current

CC output pin voltage exceeds

VCONN input voltage when the

power switch is turned-off

The reverse biased body diode of the back-

to-back MOS switches is naturally disabled

preventing current to flow from the CC

output pin to the input.

Reverse voltage

CC output pin voltage exceeds

VCONN input voltage of more than

0.35 V for 5 V when the power

switch is turned-on

Power switch is opened immediately until

the voltage difference falls below the

voltage limit. I2C alert is asserted

immediately thanks to

VCONN_SW_RVP_FAULT bits.

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