FUSB15201 datasheet(13/19 Pages) ONSEMI

13 / 19 page

FUSB15201

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USB Type−C & PD Peripheral Overview

The USB Type−C and PD peripheral is a fully compliant

USB Type−C and PD solution.

This peripheral consists of an analog front end and a

digital state machine. Firmware implements the higher level

protocol and policy layers whereas the analog and digital

components can perform lower level PD protocol and PHY

layer functions.

The Type−C block includes all terminations and

comparators required for Source/Sink/DRP operation: plug

orientation detection, power capability advertisement

and power role detection. If no VDD is applied, the CC Pins

are high impedance.

Figure 5. USB Type−C and PD

USB PD PHY

BMC

DRIVER

BMC

Encode

BMC

Decode

CC State Machine &

Comparators

vdd

LV REG

ADC

SRAM

6KB

Flash

132KB

ARM

M0+

Timers

Type−C

USB PD

BMC

Rcvr

CDR

CRC32Rx

4B5B

CRC32Tx

Type−C Terminations

VDD

VCONN Switch

CC1

CC2

VCONN Switch

Some applications require that a VCONN voltage be

sourced in order to provide additional capabilities, such as

greater than 3 A VBUS sourcing or support for full−featured

Type−C cables.

The FUSB15201 can provide 1.5 W or more depending on

VDD level.

USB PD PHY State Machine Logic

The FUSB15201 PD module includes the following

digital functions to enable USB PD messaging:

• Serialization and de−serialization

• Clock and data recovery (CDR)

• 4B5B coding

• BMC coding

• Packet CRC generation and checking

• Coding and detection of Power Delivery K−Codes

• Automatic GoodCRC packet response

VBUS Discharge

The FUSB15201 is able to discharge VBUS via selectable

pull−down resistors.

Typical source applications will rely on the DC−DC

converter to transition between VBUS voltages.

If the application requires the FUSB15201 to discharge

VBUS, the firmware may select the proper resistance

of the discharge. Selection of discharge resistance needs to

take into account any capacitive load on VBUS as not to

violate VsrcSlewNeg in the USB PD spec (30 mV/

ms).

Source applications, where the FUSB15201 internal

discharge is utilized, will have to isolate any large bulk

capacitances in order to prevent extreme internal

temperature rises. Typical isolated source capacitances

are around 4.7

mF.

The FUSB15201 is capable of discharging up to 100

from VBUS in the entire operating range.

FUSB15201 Datasheet(PDF) 13 Page - ON Semiconductor

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