STUSB1600 datasheet(44/69 Pages) STMICROELECTRONICS

44 / 69 page

Application

STUSB1600

44/69

DocID028937 Rev 1

Application

The sections below are not part of the ST product specification. They are intended to give a

generic application overview to be used by the customer as a starting point for further

implementation and customization. ST does not warrant compliancy with customer

specifications. Full system implementation and validation are under the customer’s

responsibility.

7.1

General information

7.1.1

Power supplies

The STUSB1600 can be supplied in three different ways depending on the targeted

application:

•

Through the VDD pin only for applications powered by VBUS that operate either in

source power role or in sink power role with dead battery mode support.

•

Through the VSYS pin only for AC powered applications with a system power supply

delivering 3.3 V or 5 V.

•

Through the VDD and VSYS pins either for applications powered by a battery with

dead battery mode support or for applications powered by VBUS with a system power

supply delivering 3.3 V or 5 V. When both VDD and VSYS power supplies are present,

the low power supply VSYS is selected when VSYS voltage is above 3.1 V. Otherwise

VDD is selected.

7.1.2

Connection to MCU or application processor

The connection to an MCU or an application processor is optional.

When a connection through the I²C interface is implemented, it provides extensive

functionality during system operation. For instance, it may be used to:

Define the port configuration during system boot (in case the NVM parameters are not

customized during manufacturing).

Change the default configuration at any time during operation

Re-configure the port power mode (i.e. source, sink or dual role)

Adjust the port power capability in source power role according to contextual power

availability and/or the power partitioning with other ports.

Save system power by shutting down the DC-DC converter according to the

attachment detection state.

Provide a diagnostic of the Type-C connection and the VBUS power path in real time

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