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[SOLVED] Wiring of DC fans in Series

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Call this a 'quasi' buck converter, balancing voltage to two dissimilar loads in series. (Without it the loads receive 22.5V top, 7.5V bottom.)

quasi buck conv clk-driv balances 2 series loads 30V supply.png

Supplemental current is added to the bottom load. No diode is needed. Waveforms are surprisingly smooth, with no need for reservoir capacitors.
 

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