![]() The R1 value has been set according to the datasheet. ![]() R6 limits the current flow to the EN pin. The cut-off frequency of this filter is around 1KHz. ![]() L2, C5, and C7 make an additional output LC filter that I added to reduce the noise and ripple. L1 and C4 are the essential buck converter elements. R2 is a 200K multiturn potentiometer to adjust the output voltage. R2, R4, and R5 build a feedback path to the chip. Full protection features include OCP and thermal shut down.” Low RDS(on) allows this chip to handle high currents.Ĭ1 and C2 are used to reduce input voltage noises. Current mode operation provides a fast transient response and eases loop stabilization. The MP2315 has synchronous mode operation for higher efficiency over output current load range. It offers a very compact solution to achieve 3A continuous output current over a wide input supply range with excellent load and line regulation. Schematic diagram of the DC to DC buck converterĪccording to the MP2315 datasheet: “The MP2315 is a high frequency synchronous rectified step-down switch-mode converter with built-in internal power MOSFETs. The main component is the MP2315 step-down buck converter. In this article, we will learn to build a small, efficient, and cheap buck converter circuit.įigure 1 shows the schematic diagram of the device. A tiny DC to DC buck converter board is useful for many applications, especially if it could deliver currents up to 3A (2A continuously without heatsink).
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