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I am designing a power supply using a buck regulator and a boost converter or two buck regulators together, and feeding them from a single (1S 3.7V) battery or a double (2S 7.4V) LiPo battery pack. The goal is power up a 3.3V MCU (i.e. ESP32 or Arduino) and one or two motors via a motor driver. Here I have 4 different options depending on the single or double cell LiPo batteries and also depending whether to use 6 or 12 volts motor(s). But my design has to work with all 4 options. Assume we are using a BMS (for the safety and power management of the LiPo battery) that could draw sufficient power from the LiPo to run both MCU and Motors. Questions: Preface: First notice, in option 1, 2 and 4, we are feeding a buck regulator and a boost converter from a 1S or 2S LiPo cell(s). And in option 3, we are feeding two buck regulators from a 2S LiPo pack.
Here are the 4 options (see circuits below): |
August 16, 2020 |
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