How the USB Power Delivery Profile Looks Like for the Google Pixel 2 XL's 18W USB-C Power Adapter

The 18W USB-C Power Adapter ships with the Google Pixel 2 XL and supports the common USB Power Delivery profiles of 15 watts (5 volts @ 3 amps) and 18 watts (9 volts @ 2 amps). Note this 18W charger is different from the original charger shipped with the original Google Pixel (seen in this review) although still supports the same power profiles.

Using the USB Power Delivery Compliance C2 Tester from Granite River Labs to run just a subset of the full USB Power Delivery compliance test suite, we can verify that the Google 18W USB-C Power Adapter makes use of 15 watts (5 volts @ 3 amps) and 18 watts (9 volts @ 2 amps) PDO's for charging. Note some compliance failures were observed.

DUT Information

Manufacturer	Google
Model Number	Pixel 2 18W PD AC Charger
Serial Number	Comm

Test Information

Date and Time:

20180224_014822

Controller and Instrument Information

Parameter	Value
GRL USB-PD_C2 Serial No.	035.013.035.032.064.
GRL USB-PD Software Version	1.3.3.8
GRL USB-PD Firmware Version	1.3.3.0.7
Board Calibration	Calibration Success.
App Mode	COMMUNICATION_ENGINE_TESTS
Tx Mask	true
Rx Mask	false
RX mask Power selection	Neutral Power
Device Type	Provider Only
Cable IR drop Imp(R)	0

Product Capabilities

Parameter	GetCapabilities
UUT_Device_Type
Vendor_Name
Product_Name
Version_Info
TID
Type_C	NONE
SOP_Capable	NONE
SOP_P_Capable	NONE
SOP_PP_Capable	NONE
SOP_P_Debug_Capable	NONE
SOP_PP_Debug_Capable	NONE
Manufacturer_Info_Supported_Port
Manufacturer_Info_VID_Port
Manufacturer_Info_PID_Port
USB_Comms_Capable	NO
DR_Swap_To_DFP_Supported	NO
DR_Swap_To_UFP_Supported	NO
Externally_Powered	YES
VCONN_Swap_To_On_Supported	NONE
VCONN_Swap_To_Off_Supported	NONE
Responds_To_Discov	NONE
Attempts_Discov	NONE
Chunking_Implemented_SOP	NO
Unchunked_Extended_Messages_Supported	NO
Accepts_PR_Swap_As_Src	NO
Accepts_PR_Swap_As_Snk	NO
Requests_PR_Swap_As_Src	NONE
Requests_PR_Swap_As_Snk	NONE
XID
Structured_VDM_Version
Data_Capable_as_USB_Host	NONE
Data_Capable_as_USB_Device	NONE
Product_Type_UFP_SOP
Product_Type_DFP_SOP
Modal_Operation_Supported	NONE
Security_Msgs_Supported_SOP	NO
USB_VID
PID
bcdDevice
SVIDs Min	0
SVIDs Max	0
SVID Fixed	NONE

Power Capabilities

Parameter	GetCapabilities
PD_Power_as_Sink
No_USB_Suspend_May_Be_Set	NONE
GiveBack_May_Be_Set	NONE
Higher_Capability_Set	NONE
Num_Snk_PDOs
Supply Type #1	-
Min Voltage #1	-
Max Voltage #1	-
Supply Type #2	-
Min Voltage #2	-
Max Voltage #2	-
Supply Type #3	-
Min Voltage #3	-
Max Voltage #3	-
Supply Type #4	-
Min Voltage #4	-
Max Voltage #4	-
PD_Power_as_Source
Rp Value
USB Suspend may be cleared	NO
Send Ping	NONE
No of Source PDOs
Supply Type #1	Fixed
Peak Current #1	0x0(A)
Voltage #1	0x64(5V)
Max Current #1	0x12C(3A)
Supply Type #2	Fixed
Peak Current #2	0x0(A)
Voltage #2	0xB4(9V)
Max Current #2	0xC8(2A)
Supply Type #3	-
Min Voltage #3	-
Max Voltage #3	-
Supply Type #4	-
Min Voltage #4	-
Max Voltage #4	-
Supply Type #5	-
Min Voltage #5	-
Max Voltage #5	-
PD_Power_as_Sink
No_USB_Suspend_May_Be_Set	NONE
GiveBack_May_Be_Set	NONE
Higher_Capability_Set	NONE
Num_Snk_PDOs
Supply Type #1	-
Min Voltage #1	-
Max Voltage #1	-
Supply Type #2	-
Min Voltage #2	-
Max Voltage #2	-
Supply Type #3	-
Min Voltage #3	-
Max Voltage #3	-
Supply Type #4	-
Min Voltage #4	-
Max Voltage #4	-

Result Summary

Sl No	Test ID	Test Name	Test Result
1	TDA.2.1.1.1	BMC-PHY-TX-EYE	PASS
2	TDA.2.1.1.2	BMC-PHY-TX-BIT	PASS
3	TDA.2.1.2.2	BMC-PHY-RX-INT-REJ	PASS
4	TDA.2.1.2.1	BMC-PHY-RX-BUSIDL	FAIL
5	TDA.2.1.3.1	BMC-PHY-TERM	PASS
7	TDA.2.2.1	BMC-PROT-SEQ-GETCAPS	PASS
11	TDA.2.2.7	BMC-PROT-BIST-NOT-5V-SRC	PASS
13	TDA.2.3.1.1	POW-SRC-LOAD-P-PC	PASS
14	TDA.2.3.2.1	POW-SRC-TRANS-P-PC	PASS
15	TDB.2.2.9	BMC-PROT-GSC-REC	FAIL

BMC Eye Diagram

Looking at the load screenshot captured from the GRL-USB-PD C2 Compliance Test Solution App, we can see that the 18W USB-C Power Adapter  supports different voltage and current levels for charging.