DC to DC Boost Converter using UC3843

DC to DC converters are quite popular among electronic enthusiasts and are widely used within the industry. There are three major types of non-isolated DC to DC converters: buck, boost, and buck-boost. In this article/video, I used there major components such as the famous UC3843 chip, a power Schottky diode, and an N-Channel Mosfet to design a compact DC to DC boost converter. The input voltage could be as low as 9V that makes it suitable for a variety of applications, such as 12V to 18V conversion to power a laptop computer using a single 12V battery.

I used Altium Designer 21 and SamacSys component libraries to design the schematic and PCB. The PCBs have been fabricated by the PCBWay in the green solder mask. Also, I examined the noise figure of the circuit using the Siglent SDS2102X Plus/SDS1104X-E oscilloscope and Siglent SDM3045X multimeter. So let’s get started!

YouTube: https://www.youtube.com/watch?v=Uh7lMEzReYw

Board

2021-07-24_20-12-38

References

Article: https://www.pcbway.com/blog/technology/DC_to_DC_Boost_Converter_using_UC3843.html

[1]: UC3843 Datasheet: https://www.ti.com/lit/ds/symlink/uc3843.pdf?HQS=ti-null-null-sf-df-pf-sep-wwe&ts=1626017670986&ref_url=https%253A%252F%252Fcomponentsearchengine.com%252F

[2]: MBR20100CT datasheet: https://www.diodes.com/assets/Datasheets/MBR20100C.pdf

[3]: IRFZ44 datasheet: https://componentsearchengine.com/Datasheets/2/IRFZ44EPBF.pdf

[4]: Altium Designer: Altium Designer - PCB Design Software

[5]: SamacSys Altium plugin: Altium Designer PCB Library - FREE - Footprints - Symbols - 3D Models

[6]: Supported SamacSys plugins:  FREE Schematic Symbols & PCB Footprints - PCB Libraries - 3D

[7]: UC3843 schematic symbol, PCB footprint, 3D model: UC3843D8TR footprint, schematic symbol and 3D model by Texas Instruments

[8]: IRFZ44 schematic symbol, PCB footprint, 3D model: IRFZ44EPBF footprint, schematic symbol and 3D model by Infineon

[9]: MBR20100 schematic symbol, PCB footprint, 3D model: MBR20100CT-E1 footprint, schematic symbol and 3D model by Diodes Inc.

[10]: Siglent SDL1020X-E DC load: SDL1000X/X-E Series Programmable DC Electronic Loads | Siglent

[11]: Siglent SDS2102X Plus oscilloscope: https://siglentna.com/digital-oscilloscopes/sds2000xp/

[12]: Siglent SDS1104X-E oscilloscope: SDS1000X-E Series Super Phosphor Oscilloscopes | Siglent