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LM317 adjustable power supply section

 
Overview

Based on the LM317 adjustable power supply, the maximum input is 40V and the output is 1.25V~37V.
Q7 turns on when the current through R14 reaches 70mA. Current greater than 70mA will not flow through the LM317, greatly reducing the power consumption and heat generation of the LM. Conversion rates are also increased. ![WeChat picture_20230609101853.jpg]
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Update:2025-06-19 19:23:42
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