Nintendo Switch Can Make Use of the Third Party AmazonBasics Dual Voltage Switch AC Charger for USB Power Delivery Fast Charging
The Dual Voltage Switch AC Charger was sold by AmazonBasics as a third party USB Type-C AC adapter for the Nintendo Switch. The adapter supports USB Power Delivery based charging for either the Switch dock or console when connected to each respective USB Type-C charging port.
The AmazonBasics Dual Voltage Switch AC Charger came bundled with a handy user manual.
Similar to the Nintendo Switch AC Adapter and Insignia Switch Dock Kit's AC adapter, the AmazonBasics Dual Voltage Switch AC Charger also offers up to 39W charging when connected to the Switch dock's USB Type-C port for stationary gaming or the Switch console's USB Type-C port for mobile gaming. Here the charger claims to support 15 watts (5 volts @ 3 amps), 27 watts (9 volts @ 3 amps), and 39 watts (15 volts @ 2.6 amps) power profiles.
We used the USB Power Test App from Granite River Labs with the Granite River Labs USB Power Delivery Compliance C2 Tester to generate the following test results for the AmazonBasics Dual Voltage Switch AC Charger.
The USB Power Test App first negotiates a power contract for every PDO supported by the AmazonBasics charger, and increases the load gradually to find the threshold where over current protection (OCP) kicks in and voltage and current start to drop for safety reasons.
The USB Power Test App also reports out all the PDO's supported by the AmazonBasics charger and their OCP thresholds. OCP thresholds for the AmazonBasics charger are set at about 24-34% above the maximum current levels for the fixed PDO's.
|PDO#1 Fixed: 5V 3A|
|PDO#2 Fixed: 9V 3A|
|PDO#3 Fixed: 15V 2.6A|
The USB Power Test App takes this data to produce an I-V curve which graphically shows the relationship between voltage and current for each PDO. We can observe as the current increases beyond the OCP threshold, the voltage immediately shuts off.
The USB Power Test App can also use the Granite River Labs USB Power Delivery Compliance C2 Tester integrated with the GW Instek APS-7100 programmable AC power supply to compare the charger's power output vs power input so that power efficiency can be measured and compared to regulatory limits from United States of Energy (DOE) Level VI or European Union's CoC Tier 2 requirements. We can repeat the power efficiency tests for different PDO's, current load conditions, and different AC input ranges, allowing us to get a complete picture of power efficiency ranges across all different usage scenarios.
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 AmazonBasics Dual Voltage Switch AC Charger.
USB-IF High Level Mapping Summary
Test Group Description
BMC Physical Layer Transmitter
BMC Physical Layer Receiver
BMC Physical Layer Miscellaneous
Protocol Specific Primary
Power Source/Sink Primary
TDA.188.8.131.52 BMC PHY TX EYE
TDA.184.108.40.206 BMC PHY TX BIT
TDA.220.127.116.11 BMC PHY RX INT REJ
TDA.18.104.22.168 BMC PHY RX BUSIDL
TDA.22.214.171.124 BMC PHY TERM
TDA.2.2.1 BMC PROT SEQ GETCAPS
TDA.2.2.3 BMC PROT SEQ DRSWAP
TDA.2.2.4 BMC PROT SEQ VCSWAP DFP
TDA.2.2.6 BMC PROT SEQ PRSWAP
TDA.2.2.7 BMC PROT BIST NOT 5V SRC
TDA.2.2.8 BMC PROT REV NUM
TDA.2.2.9 BMC PROT GSC REC
TDA.126.96.36.199 POW SRC LOAD P PC
TDA.188.8.131.52 POW SRC TRANS P PC
BMC Eye Diagram
Using the GRL-USB-PD C2 Compliance Test Solution App to generate the below trace load, we can also see that the AmazonBasics Dual Voltage Switch AC Charger makes use of different voltage and current levels for charging.