UPD301B/C

DS00003412A-page 12

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2020 Microchip Technology Inc.

2.3.6

2-PORT DUAL ROLE POWER/DATA APPLICATION ‘CHARGE-THROUGH ADAPTER’

(UPD301C ONLY)

An example of a charge through adapter/mobile dock device is shown in Figure 2-6. In this example, the ‘Charger Input

Port’ may pass a high voltage power profile through the system to an attached mobile device. If a charger is not inserted

into the ‘Charger Input Port’. then the mobile device may power the adapter with 5V power.

A cross-bar switch is shown for routing DisplayPort Alternate Mode and USB3 data to the connector, allowing port

expansion and video display.

An LDO is shown connected to a power OR circuit to ensure power to the system is available regardless of which Type-

-C port is supplying power to the system. The LDO should be selected to operate at the maximum supported charge-

through voltage.

FIGURE 2-6:

SYSTEM BLOCK DIAGRAM - 2-PORT DUAL ROLE POWER/DATA APPLICATION

‘CHARGE-THROUGH ADAPTER’

Microchip

UPD301C

CC1

CC2

Load Switch

Microchip

UPD350

CC1

CC2

SPI

M

S

VBUS_DET

VBUS_DET

LDO

POWER

Mobile

Device

Port

Charger

 Input

Port

X‐Bar 

Data 

Mux

DP to 

HDMI

HDMI

Port

USB Port

HDMI

DP

USB3

USB2

5V Power

VBUS