The project described here is a high voltage step-down regulator based on A4447 general-purpose buck converter chip from Allegro Semiconductor. The output voltage of the board is configured at 3.3V, but it is adjustable from 0.8 to 24V, based on the resistor divider R2 and R5. Connector CN1 is for DC input 24V-42V, Connector CN2 is DC Output. Refer to the information below to adjust various voltage outputs.
more information: https://www.electronics-lab.com/project/42v-input-3-3v-2a-output-high-voltage-step-down-regulator/
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