For troubleshooting USB ports and USB chargers
Tests the power delivery capability of USB ports up to 100Watts according to USB Battery Charging 1.2 and USB Power Delivery standards.
Tests the power delivery capability of USB chargers (Detects proprietary chargers and adjusts the maximum current accordingly).
Negotiates voltage levels with host PD controller chip to switch between different voltage levels. Dissipates 50 watts continuously, and up to 100 watts for short periods.
Current can be adjusted with milliamp precision using rotary encoder or via software.
USB-PD ('PD' stands for 'Power Delivery') is a universal standard that can fast-charge a variety of devices that use USB-C to deliver increased power (more than 7.5 W) to devices with greater power demands. Devices can request higher currents and supply voltages from compliant USB-PD hosts, for example a phone may request 15W of power, where a laptop might request 45W.
Quick Charge is a proprietary charging protocol developed by Qualcomm, which is used to manage power delivered to a range of devices by USB. It achieves this by having these devices communicate with the power supply and negotiate an appropriate and increased voltage, which results in faster charging. Quick Charge 4+ is the latest version of this technology and can support between 3V-21V at 100W (20v/5A).
An E-Marked cable (electronically marked cable) is a USB Type-C cable that uses a marker chip to provide the cable's characteristics e.g. its current carrying capability, its performance, vendor identification, etc. E-Marked chips are required when:
Do not touch or cover heatsink during operation as it can reach high temperatures, which could result in burns or failure of the USB PD Tester.
Do not block the operation of the fans & allow good airflow. Allow at least 10cm of air gap around the back of the fans. Also ensure there is airflow under the device.
Only use the USB PD tester with devices that claim compliance with the USB standards. A catastrophic failure of the device under test can result in the shorting of mains power to the USB cable. Which can both destroy the USB PD Tester and present a serious electrocution hazard.
The USB PD Tester is not a consumer device. It was designed for use by qualified electrical engineers.
Some USB power supplies are known to not fully comply with the USB standards. Some also do not comply with relevant electrical standards in the countries where they are sold. Faulty or poorly designed devices can be dangerous! The USB PD Tester may expose design and manufacturing flaws in the device when putting the device under high load. The result can be catastrophic failure of the device under test. Which in turn can lead to fire, melting of the device under test, smoke, electrical shorts and even destruction of the USB PD tester itself.
Do not draw more current from the device than it claims to support. The port might be damaged as a result, or over current protection might lead to the port shutting down.