How USB Power Delivery Looks Like for the USB Type-A Based Xiaomi 45W QC4+ Charger (That Shipped with the Xiaomi Mi 9 Pro 5G Phone)

The Xiaomi 45W QC4+ charger was shipped with the Xiaomi Mi 9 Pro 5G to provide up to 45 watts of charging for the phone, which is one of the highest power charging available among other smartphones released in 2019. Despite supporting Qualcomm Quick Charge 3.0 technology, the USB Type-A based Xiaomi charger can negotiate over USB Power Delivery 3.0 based PPS technology using the special 5A USB Type-A to Type-C cable that was also shipped in-box with the Mi 9 Pro 5G. 

Click here to see how the Mi 9 Pro 5G supports USB Power Delivery 3.0 PPS with the Xiaomi 45W QC4+ charger. 

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 see that the Xiaomi 45W QC4+ charger  supports 15 watts (5 volts @ 3 amps), 27 watts (9 volts @ 3 amps), 30 watts (15 volts @ 2 amps) and 45 watts (20 volts @ 2.25 amps) fixed PDO's for charging out. Some compliance failures were also observed for this Xiaomi charger. 

Source Capabilities

Parameter	GetCapabilities
Src_PDO_Supply_Type #1	Fixed
Src_PDO_Peak_Current #1	0
Src_PDO_Voltage #1	5V
Src_PDO_Max_Current #1	3A
Src_PDO_Supply_Type #2	Fixed
Src_PDO_Peak_Current #2	0
Src_PDO_Voltage #2	9V
Src_PDO_Max_Current #2	3A
Src_PDO_Supply_Type #3	Fixed
Src_PDO_Peak_Current #3	0
Src_PDO_Voltage #3	15V
Src_PDO_Max_Current #3	2A
Src_PDO_Supply_Type #4	Fixed
Src_PDO_Peak_Current #4	0
Src_PDO_Voltage #4	20V
Src_PDO_Max_Current #4	2.25A

Power Delivery 3.0 Tests- Result Summary

Sl No	Test ID	Test Name	Test Result
2	TD.PD.LL3.E2	TD.PD.LL3.E2 Retransmission	PASS
3	TD.PD.LL3.E3	TD.PD.LL3.E3 GoodCRC Compatibility with PD2	PASS
4	TD.PD.SRC3.E1	TD.PD.SRC3.E1 Source Capability Fields Checks	PASS
5	TD.PD.SRC3.E2	TD.PD.SRC3.E2 Accept Fields Checks	PASS
6	TD.PD.SRC3.E3	TD.PD.SRC3.E3 PSRDY Fields Checks	PASS
7	TD.PD.SRC3.E4	TD.PD.SRC3.E4 Specification Revision Check after Contract	PASS
8	TD.PD.SRC3.E5	TD.PD.SRC3.E5 Source Capabilities Extended sent timely	PASS
9	TD.PD.SRC3.E6	TD.PD.SRC3.E6 Source Capabilities Extended Fields Checks	FAIL
10	TD.PD.SRC3.E7	TD.PD.SRC3.E7 Battery Status sent Timely	PASS
11	TD.PD.SRC3.E8	TD.PD.SRC3.E8 Battery Status Fields Checks	PASS
12	TD.PD.SRC3.E9	TD.PD.SRC3.E9 Battery Status Fields Checks Invalid Battery reference	PASS
13	TD.PD.SRC3.E10	TD.PD.SRC3.E10 Unrecognized Message Received in Ready State	PASS
14	TD.PD.SRC3.E11	TD.PD.SRC3.E11 Get Status Fields Checks	PASS
15	TD.PD.SRC3.E12	TD.PD.SRC3.E12 Get Battery Status Fields Checks	PASS
16	TD.PD.SRC3.E13	TD.PD.SRC3.E13 Status sent timely	PASS
17	TD.PD.SRC3.E14	TD.PD.SRC3.E14 Status Fields Checks	PASS
18	TD.PD.SRC3.E15	TD.PD.SRC3.E15 Battery Capabilities sent timely	PASS
19	TD.PD.SRC3.E16	TD.PD.SRC3.E16 Battery Capabilities Fields Checks	PASS
20	TD.PD.SRC3.E17	TD.PD.SRC3.E17 Battery Capabilities Fields Checks Invalid Battery Reference	PASS
21	TD.PD.SRC3.E18	TD.PD.SRC3.E18 Manufacturer Info Sent Timely	PASS
22	TD.PD.SRC3.E19	TD.PD.SRC3.E19 Manufacturer Info Fields Checks	PASS
23	TD.PD.SRC3.E20	TD.PD.SRC3.E20 Manufacturer Info Fields Checks Invalid Manufacturer Info Target	PASS
24	TD.PD.SRC3.E21	TD.PD.SRC3.E21 Manufacturer Info Fields Checks Invalid Manufacturer Info Ref	PASS
27	TD.PD.SRC3.E24	TD.PD.SRC3.E24 Unexpected Message Received in Ready State	PASS
28	TD.PD.SRC3.E25	TD.PD.SRC3.E25 Receiving chunked extended message	PASS
29	TD.PD.SRC3.E26	TD.PD.SRC3.E26 Soft Reset sent regardless of Rp value	PASS
35	TD.PD.SRC3.E32	TD.PD.SRC3.E32 ChunkSenderResponseTimer Timeout	PASS
36	TD.PD.SRC3.E33	TD.PD.SRC3.E33 Country Codes Sent Timely	PASS
37	TD.PD.SRC3.E34	TD.PD.SRC3.E34 Country Codes Fields Checks	PASS
38	TD.PD.SRC3.E35	TD.PD.SRC3.E35 Country Info Sent Timely	PASS
39	TD.PD.SRC3.E36	TD.PD.SRC3.E36 Country Info Fields Checks	PASS
40	TD.PD.VDM3.E1	TD.PD.VDM3.E1 Fields Checks Discover Identity	PASS
42	TD.PD.VNDI3.E3	TD.PD.VNDI3.E3 VDM Identity	FAIL
45	TD.PD.VNDI3.E6	TD.PD.VNDI3.E6 Unchunked Extended Messages Supported	FAIL
46	TD.PD.VNDI3.E7	TD.PD.VNDI3.E7 Security Msgs Supported	FAIL

Source Power Tests- Result Summary

Sl No	Test ID	Test Name	Test Result
3	SPT.3	SPT.3 Hard Reset Test	PASS
5	SPT.5	SPT.5 Over Current Test	PASS
7	SPT.7	SPT.7 PPS Current Limit Test	FAIL

PD2 Deterministic Tests- Result Summary

Sl No	Test ID	Test Name	Test Result
1	TD.PD.LL.E1	TD.PD.LL.E1 GoodCrc Timing	PASS
2	TD.PD.LL.E2	TD.PD.LL.E2 Retransmission	PASS
3	TD.PD.LL.E3	TD.PD.LL.E3 Soft Reset Usage	PASS
4	TD.PD.LL.E4	TD.PD.LL.E4 Hard Reset Usage	PASS
5	TD.PD.LL.E5	TD.PD.LL.E5 Soft Reset	PASS
6	TD.PD.SRC.E1	TD.PD.SRC.E1 Source Capabilities sent timely	FAIL
7	TD.PD.SRC.E2	TD.PD.SRC.E2 Source Capabilities Fields Checks	PASS
8	TD.PD.SRC.E3	TD.PD.SRC.E3 SourceCapabilityTimer Timeout	PASS
9	TD.PD.SRC.E4	TD.PD.SRC.E4 SenderResponseTimer Deadline Request	PASS
10	TD.PD.SRC.E5	TD.PD.SRC.E5 SenderResponseTimer Timeout Request	PASS
11	TD.PD.SRC.E6	TD.PD.SRC.E6 PSHardResetTimer Timeout	PASS
12	TD.PD.SRC.E7	TD.PD.SRC.E7 Accept sent timely	PASS
13	TD.PD.SRC.E8	TD.PD.SRC.E8 Accept Fields Checks	PASS
14	TD.PD.SRC.E9	TD.PD.SRC.E9 PS RDY sent timely	PASS
15	TD.PD.SRC.E10	TD.PD.SRC.E10 PS RDY Fields Checks	PASS
16	TD.PD.SRC.E11	TD.PD.SRC.E11 Accept Requests can be met	PASS
17	TD.PD.SRC.E12	TD.PD.SRC.E12 Reject Requests cannot be met	PASS
18	TD.PD.SRC.E13	TD.PD.SRC.E13 Reject Request Invalid Object Position	PASS
19	TD.PD.SRC.E14	TD.PD.SRC.E14 Atomic Message Sequence	PASS
20	TD.PD.SRC.E15	TD.PD.SRC.E15 Give Source Cap	PASS
21	TD.PD.SRC.E16	TD.PD.SRC.E16 PDO Transition	PASS
24	TD.PD.VDMD.E3	TD.PD.VDMD.E3 Incorrect Fields Discover Identity	PASS
25	TD.PD.VDMD.E4	TD.PD.VDMD.E4 Applicability	PASS
28	TD.PD.PHY.E1	TD.PD.PHY.E1 BIST Test Data	PASS
31	TD.PD.PHY.E4	TD.PD.PHY.E4 Transmitter Bit Rate and Bit Rate Drift	FAIL
32	TD.PD.PHY.E5	TD.PD.PHY.E5 Transmitter Collision Avoidance	PASS
33	TD.PD.PHY.E6	TD.PD.PHY.E6 Receiver Swing Tolerance	PASS
34	TD.PD.PHY.E7	TD.PD.PHY.E7 Receiver Bit Rate Tolerance	PASS
35	TD.PD.PHY.E8	TD.PD.PHY.E8 Receiver Bit Rate Deviation Tolerance	PASS
36	TD.PD.PHY.E9	TD.PD.PHY.E9 Valid SOP Framing	PASS
37	TD.PD.PHY.E10	TD.PD.PHY.E10 Invalid SOP Framing	PASS
38	TD.PD.PHY.E11	TD.PD.PHY.E11 Valid SOP P Framing	PASS
39	TD.PD.PHY.E12	TD.PD.PHY.E12 Invalid SOP P Framing	PASS
40	TD.PD.PHY.E13	TD.PD.PHY.E13 Valid SOP PP Framing	PASS
41	TD.PD.PHY.E14	TD.PD.PHY.E14 Invalid SOP PP Framing	PASS
42	TD.PD.PHY.E15	TD.PD.PHY.E15 SOP P_Debug SOP PP Debug Framing	PASS
43	TD.PD.PHY.E16	TD.PD.PHY.E16 Valid Hard Reset Framing	PASS
44	TD.PD.PHY.E17	TD.PD.PHY.E17 Invalid Hard Reset Framing	PASS
45	TD.PD.PHY.E18	TD.PD.PHY.E18 Valid Cable Reset Framing	PASS
46	TD.PD.PHY.E19	TD.PD.PHY.E19 Invalid Cable Reset Framing	PASS
47	TD.PD.PHY.E20	TD.PD.PHY.E20 EOP Framing	PASS
48	TD.PD.PHY.E21	TD.PD.PHY.E21 Preamble	PASS

PD2 Communication Engine Tests- Result Summary

Sl No	Test ID	Test Name	Test Result
2	TDA.2.1.1.2	TDA.2.1.1.2 BMC PHY TX BIT	FAIL
3	TDA.2.1.2.2	TDA.2.1.2.2 BMC PHY RX INT REJ	PASS
4	TDA.2.1.2.1	TDA.2.1.2.1 BMC PHY RX BUSIDL	FAIL
5	TDA.2.1.3.1	TDA.2.1.3.1 BMC PHY TERM	PASS
6	TDA.2.1.3.2	TDA.2.1.3.2 BMC PHY MSG	PASS
7	TDA.2.2.1	TDA.2.2.1 BMC PROT SEQ GETCAPS	PASS
9	TDA.2.2.2.2	TDA.2.2.2.2 BMC PROT SEQ CHKCAP NOMARK P PC	PASS
13	TDA.2.2.7	TDA.2.2.7 BMC PROT BIST NOT 5V SRC	PASS
15	TDA.2.2.9	TDA.2.2.9 BMC PROT GSC REC	PASS
16	TDA.2.3.1.1	TDA.2.3.1.1 POW SRC LOAD P PC	PASS
17	TDA.2.3.2.1	TDA.2.3.2.1 POW SRC TRANS P PC	PASS