What Power Profile the Razer 24W Charger Supports
The Razer 24W Charger is Qualcomm Quick Charge 4+ certified and supports up to 24 watts charging for the Razer Phone using USB Power Delivery 3.0 based PPS (Programmable Power Supply) and APDO's (Augmented Power Delivery Objects). Click here to see well the Razer 24W Charger actually performs with the Razer Phone over full charging.
The Razer 24W Charger uses USB Power Delivery to support fixed PDO's (Power Delivery Objects) of 15 watts (5 volts @ 3 amps), 24 watts (9 volts @ 2.67 amps), and 24 watts (12 volts @ 2 amps) as well as two APDO's with two different voltage ranges of 3-5.9 volts @ 3 amps and 3-11 volts @ 2.65 amps.
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 Razer 24W Charger.
The USB Power Test App first negotiates a power contract for every PDO supported by the Razer 24W 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 Razer charger and their OCP thresholds. OCP thresholds for the charger are set at about 23% above the maximum current levels for the fixed PDO's.
|PDO#1 Fixed: 5V 3A|
|PDO#2 Fixed: 9V 2.66A|
|PDO#3 Fixed: 12V 2A|
|PDO#4 PPS: (3~5.9)V 3A|
|PDO#5 PPS: (3~11)V 2.65A|
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. Like other chargers that support PPS (Programmable Power Supply), we can observe current fold-back behavior for the 4th and 5th PDO's where as the current increases beyond the OCP threshold, the voltage starts to curve down rather than immediately shutting off. The 5th PDO displays more dramatic fold-back behavior compared to the other PDO. The 1st, 2nd and 3rd PDO's in contrast show the voltage immediately shuts off when crossing the OCP threshold.
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.