| 主权项 |
1. A fan comprising:
at least one fan blade; a fan motor configured to rotate the fan blade; a motor control comprising a microcontroller, level shifters electrically coupled to the microcontroller, and drivers electrically coupled to the level shifters and configured to drive the fan motor; and a power supply comprising a step-down high efficiency buck converter and a step-down low drop-out linear voltage regulator, wherein the drivers are configured to receive a first input voltage for driving the fan motor, wherein the step-down high efficiency buck converter is configured to receive the first input voltage and to decrease the first input voltage to a second lower voltage, wherein the step-down high efficiency buck converter is configured to output the second lower voltage to the level shifters and to the step down low drop-out linear voltage regulator, wherein the step-down low drop-out linear voltage regulator is configured for receiving the second lower voltage from the step-down high efficiency buck converter and outputting a third lowest voltage which is lower than the second lower voltage, wherein the step down low drop-out linear voltage regulator is electrically coupled to the microcontroller and the third lowest voltage drives the microcontroller, wherein the first input voltage is in a range of 12V to 24V, wherein the second lower voltage is in a range of 4V to 7V, wherein the third lowest voltage is in a range of 3V to 4V. |
