Testna naprava za obremenilni preizkus napajalnikov s protokolom USB Power Delivery

JUVANČIČ, ALJAŽ (author), Kamnik, Roman (mentor)

V diplomski nalogi je opisan postopek načrtovanja in izdelave obremenitvenega ter testnega vezja za napajalnike s podporo protokola USB-C Power Delivery. Glavni sestavni deli naprave so USB Power Delivery integrirano vezje STUSB4500, razvojna plošča NUCLEO-F303K8, napetostni izbirnik MAX17614 ter aktivno breme. Naprava omogoča obremenitev napajalnika s tokom do 3 A pri napetostih 9 in 20 V. Pri vsaki izbrani napetosti mora napajalnik v okviru testiranja neprekinjeno delovati 8 sekund, pri čemer je rezultat posameznega testa za vsako napetost posebej signaliziran s svetlečo diodo. Naprava mora delovati znotraj dopustnega odstopanja ±10 % od nazivnih napetostnih in tokovnih vrednosti. Zaradi obremenitve aktivnega bremena približno 60 W, sta bila napravi dodana hladilno rebro in ventilator za zagotavljanje ustreznega hlajenja. V delu je predstavljen tudi razvoj USB protokola, pri čemer je posebna pozornost posvečena podrobnejši predstavitvi USB-PD protokola. Namen dela je zasnova in izvedba robustne in zanesljive rešitve, ki bo pripomogla k izboljšanju kakovosti in varnosti napajalnikov, priloženih napravam podjetja Tasking Labs, d.o.o.

• Language: Slovenian
• Keywords: aktivno breme, USB-PD protokol, USB napajalnik, USB Power Delivery
• Work type: Bachelor thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2026
• PID: 20.500.12556/RUL-182540
• Publication date in RUL: 15.05.2026

Secondary language

• Language: English
• Title: Test Device for Load Testing of Power Supplies with USB Power Delivery Protocol

Abstract

This bachelor’s thesis presents the design and implementation of a load and test circuit for power supplies supporting USB-C Power Delivery protocol. The main components of the device include the USB Power Delivery controller STUSB4500, the NUCLEO-F303K8 development board, the MAX17614 voltage selector, and an active load. The device loads the power supply with a current of 3 A at voltages of 9 and 20 V. For each selected voltage, the power supply must operate continuously for a test duration of 8 seconds, with the test result for each voltage indicated individually by an LED diode. Operation of the device must stay within a ±10 % of the nominal voltage and current values. Due to the power dissipation of the active load of approximately 60 W, a heatsink and a cooling fan were added to provide sufficient heat dissipation. The thesis also presents the development of the USB protocol, with a special focus on the USB Power Delivery protocol. The goal of the work is to design and implement a robust and reliable solution that will contribute to improving the quality and safety of power supplies provided with devices from Tasking Labs,

• Keywords: active load, USB-PD protocol, USB power supply, USB Power Delivery