Prenosen baterijski stikalni napajalnik z digitalnim krmiljenjem

Papež, Jože (author), Jankovec, Marko (mentor)

Pri razvoju novih elektronskih vezij in naprav se kot vir energije večinoma uporabljajo laboratorijski napajalniki. Praviloma so te naprave napajane iz elektroenergetskega omrežja, kar oteži njihovo mobilnost. Diplomsko delo obsega načrtovanje prenosnega baterijskega stikalnega napajalnika z digitalnim krmiljenjem. Izhodno napetostno območje napajalnika je omejeno med 0 in 15~V. Vsebuje nastavljivo tokovno limito med 0 in 1~A, ki služi tudi kot vir konstantnega toka. Napajalnik je izdelan v stikalni izvedbi SEPIC. Stikalna izvedba omogoča visok izkoristek. Visoko mobilnost napajalnika zagotavlja Li-ion baterija in vgrajeni hitri polnilnik. Enostavnost uporabe omogoča polnjenje preko priključka USB-C. Upravljanje nastavitev napajalnika je izvedeno z zaslonom na dotik. Jedro vezja je mikrokrmilnik STM32G483. Enota SPI krmili prikaz zaslona in sprejema podatke dotika zaslona. Preko časovnika pa krmili napetostno in tokovno limito napajalnika.

• Language: Slovenian
• Keywords: napajalnik, elektronske naprave, napetost, tok, mikrokrmilnik, sepic, baterija
• Work type: Bachelor thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2023
• PID: 20.500.12556/RUL-149861
• COBISS.SI-ID: 165683203
• Publication date in RUL: 11.09.2023

Secondary language

• Language: English
• Title: Portable battery-operated switching power supply with digital control

Abstract

In the development of new electronic circuits and devices, laboratory power supplies are mostly used as a source of energy. Usually these devices are powered from the power grid, which limits their usage in mobile applications. In this thesis the design of a portable battery switching power supply with digital control is presented. The output voltage range of the power supply is limited between 0 and 15~V. It contains an adjustable current limit between 0 and 1~A, which also serves as a constant current source. The power supply is based on a SEPIC switch mode DC-DC power converter, that allows high power conversion efficiency. The high mobility of the power supply is ensured by a Li-ion battery and a built-in fast charger. Ease of use allows charging via the USB-C port. The management of the power supply settings is carried out with a touch screen. The core of the circuit is the STM32G483 microcontroller. The SPI unit controls the screen display and accepts screen touch data. The timer controls the voltage and current limit of the power supply.

• Keywords: power supply, electronic devices, voltage, current, microcontroller, sepic, battery