 2018-2019 Microchip Technology Inc.

DS00002838B-page 7

UPD301A

2.0

INTRODUCTION

2.1

General Description

The UPD301A is a stand-alone, small form factor USB Type-C™ Power Delivery (PD) Port Controller designed to

adhere to the USB Type-C™ Cable and Connector Specification and USB Power Delivery 3.0 Specification. The

UPD301A provides stand-alone operation for source PD applications, enabling cable plug orientation and detection for

a USB Type-C receptacle, and implementing baseband communication with a partner USB Type-C device via the inte-

grated USB Power Delivery 3.0 MAC.

The embedded 32-bit ARM Cortex-M0+ implements a full Power Delivery firmware stack, providing a turn-key solution

for USB-C™ power-only applications, and requiring minimal customer development. Configuration is supported via pin

straps to select source functionality and PD power profiles. Optionally, a second PD port is supported via SPI connection

of an external Microchip UPD350.

Additionally, the UPD301A integrates many of the analog discrete components required for USB Type-C PD applica-

tions, including two VCONN FETs with Rp/Rd switching and current/voltage sense circuitry for over-voltage/current

detection. By integrating the PD firmware and many of the analog discrete components required for USB Type-C PD

applications, the UPD301A provides a low cost, stand-alone, fast time-to-market solution for consumer, industrial, and

automotive applications.

The UPD301A is available in commercial (0°C to +70°C) and industrial/automotive grade 3 (-40°C to +85°C) tempera-

ture ranges. For ordering information, refer to the Product Identification System on page 38.

2.2

Example Applications

The UPD301A has been designed for multiple applications, including:

• Source-Only Applications (E.G., Charging Ports)

• Two-Port Applications (E.G., Automotive Rear Seat Charging)

2.2.1

SOURCE-ONLY APPLICATIONS (E.G., CHARGING PORTS)

The simplest UPD301A application is a power source (Source-Only), as shown in Figure 2-1. Using the device config-

uration straps, various PD parameters/options can be configured. The integrated DAC configures the DC-DC converter,

selecting the output voltage, and controls the load switch to regulate and protect the output voltage. The load switch can

also be replaced by discrete FETs and over-current / over-voltage protection circuits.

Note:

Single-Port Source and Dual-Port Source modes are the only supported modes of operation.

FIGURE 2-1:

SYSTEM BLOCK DIAGRAM - SOURCE-ONLY APPLICATION

Microchip

UPD301A

CC1

CC2

VBUS

60W Load 

Switch

DC In

Configuration 

Straps

Load Switch

DC‐DC 

Converter

BOOT_SEL

DC_DC_SEL

PDP_SEL0

PDP_SEL1

I2C_ADDR_SEL