This feature is the "Mini Air Cooling Fan" locked rotor, fan current moment into small (myopia zero A) lock, release the rotor, the rotor is stopped, the length of a few seconds (the time to stop the state from IC itself conventional design or special needs for design changes) automatically released from IC internal voltage can lead to "Mini Air Cooling Fan" to resume work, starting from the beginning of the fan rotor stopped functioning state. The main reason for this feature to prevent the installation process of the fan rotor by external factors cause the rotor is stuck or dead fan, often time is affected by a large current caused "Mini Air Cooling Fan" burned.