Power Supply Design Using Microcontroller-Based Buck-Boost Converter

Che Jusoh, Nur Ain Syafiqah (2018) Power Supply Design Using Microcontroller-Based Buck-Boost Converter. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Power Supply Design Using Microcontroller-Based Buck-Boost Converter.pdf - Submitted Version Download (478kB)

Abstract

Most of electronic equipment operates in range 1.5V to 24V and it always be powered from batteries. However, batteries have specific voltage value to divide power for equipment, thus making it less flexible. For some cases, an adjustable power supply is needed for various reason, for example, a repair technician uses an adjustable power supply to troubleshoot a faulty component. Most universal power supplies that are available at market are designed by using step-down transformer, rectifier, and filter circuit. Thus, a desired voltage output at a constant value cannot be produced under different load due to open loop control configuration. To overcome this limitation, a microcontroller-based power supply device is designed based on buck-boost configuration. The device is equipped with closed loop control of PID algorithm to enable constant output voltage under different load. The device is developed by combination of Arduino microcontroller, buck boost converter circuit, seven segment display and potentiometer. To verify its efficacy, the device is connected to 510 Ω, 1000 Ω and 2000 Ω, and it is found the device capable to produce output voltage ranging from 1.5V to 24V providing the PID gain values are appropriately tuned.

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