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How the Power Profile Looks Like For the Tama 36W USB PD AC Charger Supporting USB Power Delivery

The 36W USB PD AC Charger is one of the USB Power Delivery chargers sold by Japan based Tama that comes with a USB Type-C output port in a single AC adapter. The Tama charger uses USB Power Delivery 2.0 over Type-C to support 15 watts (5 volts @ 3 amps), 27 watts (9 volts @ 3 amps), 30 watts (12 volts @ 2.5 amps) and 36.25 watts (14.5 volts @ 2.5 amps) power profiles for rapid charging.

You can use the Tama 36W USB PD AC Charger to charge your latest iPhone like the Apple iPhone 11 Pro Max or Android phones such as Google's Pixel 4 XL and Samsung's Galaxy Note10+ fast at 9-12 volts or power your tablets like Apple's 11-inch iPad Pro (2018) and smaller notebook computers like Apple's MacBook (Early 2016) at 15 volts. Just make sure to use the Apple USB-C to Lightning Cable if you need to charge your Apple devices.

Here's how the Tama 36W USB PD AC Charger looks like after purchase.

Note you won't get any cable accessory inside the packaging of the Tama 36W USB PD AC Charger.

To observe the power capabilities of the Tama 36W USB PD AC Charger, 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.

The USB Power Test App first negotiates a power contract for every PDO supported by the Tama 36W USB PD AC 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.

OCP Plot for PDO #1 and #4

OCP Plot for PDO #2 and #3

The USB Power Test App reports out all the PDO's supported by the Tama charger and their OCP thresholds. OCP thresholds for the charger are set at about 38-48% above the maximum current levels for the PDO's.

PDO	OCP
PDO#1 Fixed: 5V 3A	4.46
PDO#2 Fixed: 9V 3A	4.45
PDO#3 Fixed: 12V 2.5A	3.7
PDO#4 Fixed: 14.5V 2.5A	3.47

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 Test App and FLIR thermal imaging tools, we measured the heat emitted by the Tama charger as seen in the following temperature heat map graph for the highest 14.5V, 2.5A PDO, which recorded max temperature of 52.37 degree Celsius.