
300W 20A CC/CV Step down converter from aliexpress
STD300W 20A CC/CV Step down converter from aliexpress
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:Public Domain
Creation time:2025-07-13 07:12:39Update time:2025-07-15 01:31:08
Description
I reverse engineered this step down converter from aliexpress and did some tests. Its synchronus step down with two RU7088R mosfets and TPS40055 controller. Design is mediocre. More in schematic.
Design Drawing

BOM


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