UPD301B datasheet(11/45 Pages) MICROCHIP

11 / 45 page



2020 Microchip Technology Inc.

DS00003412A-page 11

UPD301B/C

2.3.5

DUAL ROLE POWER/DATA APPLICATION (HIGH VOLTAGE SOURCE, 5V @ 0A SINK)

(UPD301C ONLY)

An example of a PD docking port is shown in Figure 2-5. In this example a battery powered mobile device, such as a

notebook, smart-phone, or tablet may connect to the docking PD port and receive a charge, access the USB device

tree, and drive an external video display through a single Type-C connection. A cross-bar switch is shown for routing

DisplayPort Alternate Mode and USB3 data to the connector, allowing port expansion and video display.

Additional notes on Dual Role Power/Data (High Voltage Source, 5V @ 0A Sink) Applications:

• While a PD docking port may technically resolve into a power sink role, a typical PD dock will not attempt to sink

any power while operating as a power sink. This type of operation may be referred to a “5V @ 0A Sink”.

• When the port is operating as a power sink/data UFP, the USB Device/Hub Upstream Port block is not required to

support USB Host/Hub Downstream Port operation.

• A Power Source Load Switch device is necessary, as the DC-DC converters bulk capacitance must be isolated

from VBUS when the port is operating as a 5V @ 0A Sink.

• USB3 operation is optional for PD docking ports.

• DisplayPort support is optional for PD docking ports.

• If an Alternate Mode such as DisplayPort is supported, a Billboard device must also be included within the system

and be exposed following an Alternate Mode negotiation failure (A Billboard device may optionally be connected

at all times and communicate a successful Alternate Mode connection, but this is optional).

• If both USB3 and DisplayPort operation are omitted, the crossbar data switch is not necessary.

• USB2 signals may be connected directly to the Type-C connector; a multiplexer is not necessary as long as the

USB2 signal layout is carefully managed to keep branches to a minimum.

FIGURE 2-5:

SYSTEM BLOCK DIAGRAM - DUAL ROLE POWER/DATA APPLICATION

(HIGH VOLTAGE SOURCE, 5V @ 0A SINK)

Microchip

UPD301C

CC1

CC2

VBUS

60W Load

Switch

DC In

Control I/O

(GPIO, DAC,

or I

2C)

Power Source

Load Switch

DC‐DC

Converter

VBUS_DET

POWER

RESET

Fault Indicator

USB Device /

Hub Upstream

Port

USB3

X‐Bar

Data

Mux

USB2

To Display Scalar/HDMI

Conversion IC/

DisplayPort MST Hub/

DisplayPort Connector/

etc.

ORIENTATION

USB Billboard

Device

BB Control

USB2

UPD301B Datasheet(PDF) 11 Page - Microchip Technology

UPD301B Datasheet(HTML) 11 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

Datasheet Download

Link URL