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Mi 45W USB Type-C Power Adapter

by Xiaomi

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A Closer Look at USB Power Delivery Support on the Xiaomi Mi 45W USB Type-C Power Adapter

Xiaomi has been highly effective at bringing down electronics prices for consumers so it's great to see Xiaomi supporting USB Power Delivery 2.0 with the Mi 45W USB Type-C Power Adapter. Originally shipped with the Mi Notebook Air 13.3", the Mi 45W USB Type-C Power Adapter  can also be used with many other popular notebook PC's, tablets, mobile phones, game consoles, and action cameras that support charging over the USB Type-C connector.

The Mi 45W USB Type-C Power Adapter is a very compact and portable wall charger supporting USB Power Delivery 2.0 charging up to 45 watts through USB Type-C. 

With a max 45 watts output, the Mi 45W USB Type-C Power Adapter can be used to rapidly charge your notebook PC such as the Mi Notebook Air 13.3", Surface Book 2 or MacBook (Early 2015). You can also use the charger with the iPhone XGoogle Pixel or Samsung Galaxy S8, and 10.5-inch iPad Pro for a quick charge but of course they won't use the full 45 watts. Note you will need to use a Apple USB-C to Lightning Cable to charge an iPhone or iPad.

Opening up the Mi 45W USB Type-C Power Adapter packaging, we can take a good look at the charger and its accessories.

The Mi 45W USB Type-C Power Adapter itself has foldable AC prongs and most conveniently comes with a USB Type-C to USB Type-C cable. The charger supports the common 100 to 240 V AC power requirement for own charging as well as supplying the most popular DC charging voltage levels - 5V, 9V, 12V, 15V, and 20V.

The Mi 45W USB Type-C Power Adapter comes with a single USB Type-C port that supports USB Power Delivery 2.0 that outputs up to 45 watts with these power profiles: 15 watts (5 volts @ 3 amps), 27 watts (9 volts @ 3 amps), 36 watts (12 volts @ 3 amps), 45 watts (15 volts @ 3 amps), and 45 watts (20 volts @ 2.25 amps). 

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 are able to do a quick check of the 5 PDO's that the Mi 45W USB Type-C Power Adapter supports for charging- 15 watts (5 volts @ 3 amps), 27 watts (9 volts @ 3 amps), 36 watts (12 volts @ 3 amps), 45 watts (15 volts @ 3 amps), and 45 watts (20 volts @ 2.25 amps). Note some compliance failures were observed.

GRL

DUT Information

Manufacturer

Xiaomi

Model Number

45W PD AC Adapter

Serial Number

Comm

Test Information

Date and Time:

20180226_021631

Controller and Instrument Information

Parameter

Value

GRL USB-PD_C2 Serial No.

039.019.039.027.062.

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

 

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

0x12C(3A)

Supply Type #3

Fixed

Peak Current #3

0x0(A)

Voltage #3

0xF0(12V)

Max Current #3

0x12C(3A)

Supply Type #4

Fixed

Peak Current #4

0x0(A)

Voltage #4

0x12C(15V)

Max Current #4

0x12C(3A)

Supply Type #5

Fixed

Peak Current #5

0x0(A)

Voltage #5

0x190(20V)

Max Current #5

0xE1(2.25A)

PD_Power_as_Sink

 

No_USB_Suspend_May_Be_Set

NONE

GiveBack_May_Be_Set

NONE

Higher_Capability_Set

NONE

Num_Snk_PDOs

 

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

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

FAIL

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


Eye Diagram

We can further observe that the Mi 45W USB Type-C Power Adapter supports charging at different voltages and current levels in the load screenshot below taken from the GRL-USB-PD C2 Compliance Test Solution App.

If you need a USB Power Delivery based charger to keep most of your smaller notebook PC's, tablets, and phones charged over USB Type-C, the Mi 45W USB Type-C Power Adapter would fit well which is also travel friendly. If you need a Xiaomi charger that supports Qualcomm Quick Charge 3.0 technology for Xiaomi phones, you can also consider the Mi 18W QC 3.0 Charger.

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