1

Functional description

The STUSB4500 is a USB Type-C™ and power delivery controller IC for sink applications. It is able to negotiate a

power delivery contract with a source without MCU support (auto-run mode). It relies on proprietary algorithms

and configurable PDO (power data objects) thanks to an integrated non-volatile memory. It supports dead battery

mode to allow a system to be powered from an external source directly. Combined with its capability to negotiate

directly a power contract, the STUSB4500 is the ideal controller device for autonomous systems requiring high

power charging profile to be fully operational.

The STUSB4500 major role is to:

1.

Detect the connection between two USB Type-C ports (attach detection)

2.

Establish a valid source-to-sink connection

3.

Determine the attached device mode: source or debug accessory

4.

Resolve cable orientation and twist connections to establish USB data routing (MUX control)

5.

Negotiate a USB power delivery (PD) contract with a PD capable source device

6.

7.

8.

Handle the high voltage protections

The STUSB4500 also provides:

•

Dead battery mode

•

PDO (power data object) customization through NVM

•

•

Dual high power charging path support

•

Debug accessory mode detection

•

Customization of the device configuration through NVM to support specific applications

1.1

Block overview

GND

SCL

SDA

CC2

CC1

VDD

Physical

Layer

POR

VBUS_VS_DISCH

voltage

monitoring

VBUS_EN_SNK

ADDR[1..0]

Policy

Engine

DISCH

CC1DB

CC2DB

RESET

ALERT

CC

line

access

ATTACH

POWER_OK2

GPIO

VSYS

A_B_SIDE

Protocol

Layer

Device

Policy

Manager

Port status

VBUS status

Internal

supply

I²C

slave

Control

Port C

controller

POWER_OK3

STUSB4500

Functional description

DS12499 - Rev 2

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