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  1. Switching power supplies are known for high efficiency. An adjustable voltage/current supply is an interesting tool, which can be used in many applications such as a Lithium-ion/Lead-acid/NiCD-NiMH battery charger or a standalone power supply. In this article, we will learn to build a variable step-down buck converter using the popular LM2576-Adj chip. Features Cheap and easy to build and use Constant current and constant voltage adjustment [CC, CV] capability 1.2V to 25V and 25mA to 3A controlling range Easy to adjust the parameters (opt
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