Rohm has introduced a current-mode buck dc-dc converter optimised for powering dc fan motors in applications such as cold air circulation in refrigerators. It has a PWM input, usually from a local MCU, which, rather than turning on and off the output, is internally smoothed to change the dc voltage at the output – output ...
Read full article: Dc-dc converter replaces fan drive in fridges
from Electronics Weekly https://www.electronicsweekly.com/news/products/power-supplies/dc-dc-converter-replaces-fan-drive-fridges-2017-04/
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