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  1. DC to DC buck converters is a famous topology in the electronic and a widely used circuit in electronic devices. A buck converter steps down the input voltage while it increases the output current. In this article/video, I have discussed a DC to DC buck converter that can be used effectively as a switching power supply. The output voltage and current are adjustable: 1.25V to 30V and 10mA to 6A (continuous). The power supply supports the constant voltage (CV) and constant current (CC) features. Two LEDs demonstrate the CV and CC status. The circuit is compact and both sides of the PCB have been used to mount the components. To design the schematic and PCB, I used Altium Designer 21, also the SamacSys component libraries (Altium plugin) to install the missing schematic symbols/PCB footprints. To get high-quality fabricated PCB boards, I sent the Gerbers to PCBWay. To test the circuit, I used the power analysis feature of the Siglent SDS2102X Plus oscilloscope (or SDS1104X-E), Siglent SDL1020X-E DC Load, and Siglent SDM3045X multimeter. Isn’t cool, so let’s get started! Specifications Input Voltage: 8V to 35VDC Output Voltage: 1.25V to 32VDC Output Current (continuous): 10mA to 6A Output Current (short period): 7A to 8A Output Noise (no load): 6mVrms (9mVp-p) Output Noise (6A load): 7mVrms (85mVp-p) Output Noise (6A load, 16P-average): 50mVp-p Efficiency: up to 96% References Source: https://www.pcbway.com/blog/technology/0_30V__0_7A_Adjustable_Switching_Power_Supply.html [1]: XL4016 datasheet: http://www.xlsemi.com/datasheet/xl4016%20datasheet.pdf [2]: MBR20100 datasheet: https://www.diodes.com/assets/Datasheets/MBR20100C.pdf [3]: TS4264 datasheet: https://www.mouser.com/datasheet/2/395/TS4264_D15-1142598.pdf [4]: MCP6002 datasheet: https://componentsearchengine.com/Datasheets/2/MCP6002T-I_SN.pdf [5]: Altium Designer: https://www.altium.com/yt/myvanitar [6]: SamacSys Altium plugin: https://www.samacsys.com/altium-designer-library-instructions [7]: Supported SamacSys plugins: https://www.samacsys.com/pcb-part-libraries [8]: XL4016 schematic symbol, PCB footprint, 3D model: https://componentsearchengine.com/part-view/XL4016/XLSEMI [9]: MCP6002 schematic symbol, PCB footprint, 3D model: https://componentsearchengine.com/search?term=mcp6002 [10]: TS4264 schematic symbol, PCB footprint, 3D model: https://componentsearchengine.com/part-view/TS4264CW50%20RPG/Taiwan%20Semiconductor [11]: MBR20100 schematic symbols, PCb footprint, 3D model: https://componentsearchengine.com/part-view/MBR20100CT-G1/Diodes%20Inc. [12]: Siglent SDS2102X Plus oscilloscope: https://siglentna.com/digital-oscilloscopes/sds2000xp/ [13]: Siglent SDS1104X-E oscilloscope: https://siglentna.com/digital-oscilloscopes/sds1000x-e-series-super-phosphor-oscilloscopes/ [14]: Siglent SDL2010X-E DC Load: https://siglentna.com/dc-electronic-load/sdl1000x/ [15]: Siglent SDM3045X Multimeter: https://siglentna.com/digital-multimeters/sdm3045x-digital-multimeter/
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