Get 18W USB Power Delivery Technology and 12W USB Type-A Charging with the SoftBank SB-AC21-PDUS

SoftBank extends its line of simple yet elegant USB Power Delivery chargers with the SoftBank SB-AC21-PDUS. The Softbank SB-AC21-PDUS has a USB Type-C port that enables USB Power Delivery and supports 15W (5V@3A), 17.5W (7V@2.5A), 18W (9V@2A), 18W (12V@1.5A), and 18W (15V@1.2A) power profiles. This 18W max profile is suitable for phones like the Google Pixel 4 XL or the Apple iPhone XS Max. The Softbank SB-AC21-PDUS also has a USB Type-A port that supports 12W (5V@2.4A) charging for legacy devices.

The Softbank SB-AC21-PDUS's packaging stands out and advertises the fact that the Softbank SB-AC21-PDUS is USB-IF certified, which is a big differentiator to many other chargers sold especially online which are not certified. 

The back of the packaging also provides a lot of technical details not normally found on packaging for other chargers.

Softbank SB-AC21-PDUS also displays the USB-IF certification logo clearly on the charger case itself, showing that the USB Type-C port can support 18W independently of what else is plugged into the USB Type-A port.

The Softbank SB-AC21-PDUS comes with a swivel AC plug which makes it easier to carry around with you and avoid it getting tangled up in cables or other things in your backpack or purse. The charger is lightweight and also comfortable to hold.

The Softbank SB-AC21-PDUS clearly states 18W next to the USB Type-C port, making it clear to the user how much power they can get.

If you need a portable smartphone charger that supports both USB Power Delivery and legacy USB charging (and is USB-IF certified) the Softbank SB-AC21-PDUS can be a good option for you.

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, some compliance failures were observed for the Softbank SB-AC21-PDUS.

PD2 Deterministic Tests - Test 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	PASS
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	FAIL
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
26	TD.PD.VNDI.E4	TD.PD.VNDI.E4 SOP Handling	FAIL
27	TD.PD.VNDI.E5	TD.PD.VNDI.E5 Source Capabilities	FAIL
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	PASS
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
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
41	TD.PD.PHY.E14	TD.PD.PHY.E14 Invalid SOP PP 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 - Test Result Summary

Sl No	Test ID	Test Name	Test Result
1	TDA.2.1.1.1	TDA.2.1.1.1 BMC PHY TX EYE	PASS
2	TDA.2.1.1.2	TDA.2.1.1.2 BMC PHY TX BIT	PASS
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	PASS
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
8	TDA.2.2.2.1	TDA.2.2.2.1 BMC PROT SEQ CHKCAB P PC	FAIL
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	FAIL
17	TDA.2.3.2.1	TDA.2.3.2.1 POW SRC TRANS P PC	FAIL

BMC Eye Diagram