Charge Your USB Type-C Device Quickly While Driving with the Verizon USB-C PD 2.0 Vehicle Charger with USB Power Delivery
The USB-C PD 2.0 Vehicle Charger was sold by Verizon as a newer version of the Verizon Vehicle Charger with Fast Charge Technology which closely resembles each other. Rather than supporting both USB Power Delivery and Qualcomm Quick Charge 3.0 technology like its predecessor, the Verizon USB-C PD 2.0 Vehicle Charger only provides USB Power Delivery 2.0 based charging over USB Type-C.
While the previous charger offers up to 30 watts charging, the Verizon USB-C PD 2.0 Vehicle Charger only allows max 27 watts output through USB Power Delivery using 15 watts (5 volts @ 3 amps) and 27 watts (9 volts @ 3 amps) power profiles.
The same pricing still applies for the Verizon USB-C PD 2.0 Vehicle Charger since we last purchased the Verizon Vehicle Charger with Fast Charge Technology some time ago (see this review). The newer charger also has the same affixed coiled USB Type-C cable connector that is also USB PD 2.0 certified to connect to Type-C devices for quick charge up inside the car.
Using the USB Power Test App from Granite River Labs with the Granite River Labs USB Power Delivery Compliance C2 Tester, we performed the following tests for the Verizon USB-C PD 2.0 Vehicle Charger.
The USB Power Test App first negotiates a power contract for every PDO supported by the Verizon 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. However the charger is not able to recover from 5V PDO OCP where the charger was observed to drop VBUS voltage to 5V when reaching 9V PDO OCP without dropping current or renegotiating PD contract.
The USB Power Test App reports out all the PDO's supported by the Verizon charger and their OCP thresholds. OCP thresholds for the Verizon charger are set at about 15-20% above the maximum current levels for the fixed PDO's.
|PDO#1 Fixed: 5V 3A|
|PDO#2 Fixed: 9V 3A|
The USB Power Test App from Granite River Labs takes this data to produce an I-V curve which graphically shows the relationship between voltage and current for each PDO. We can observe after the current increases beyond the 5V PDO OCP threshold, the voltage just drops to 5V from 9V PDO OCP threshold without dropping current.
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 Verizon USB-C PD 2.0 Vehicle 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.18.104.22.168 BMC PHY TX EYE
TDA.22.214.171.124 BMC PHY TX BIT
TDA.126.96.36.199 BMC PHY RX INT REJ
TDA.188.8.131.52 BMC PHY RX BUSIDL
TDA.184.108.40.206 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.220.127.116.11 POW SRC LOAD P PC
TDA.18.104.22.168 POW SRC TRANS P PC
BMC Eye Diagram
We can also see from the load trace below captured using the GRL-USB-PD C2 Compliance Test Solution App that shows the Verizon USB-C PD 2.0 Vehicle Charger also supports different voltage and current levels for charging.