Surge current preventing and time sequence controlling device and method for thermal connect-disceonnect electronic equipment

The present invention provides one kind of surge current preventing and time sequence controlling device and method for plug-and-play electronic equipment. The device includes voltage controlled resistance unit connected serially to the power source input end of the electronic equipment; and controller with control end connected to the control end of the voltage controlled resistance unit to control the equivalent resistance, which is controlled to be relatively great while the electronic equipment is accessed to the power source and relatively small after preset time. The controller includes resistor and capacitor and controls the control voltage of the control end via controlling the charge and discharge of the capacitor. The method includes the following steps: determining the sequence of applying different power voltages to the electronic equipment; judging the plugging of electronic equipment; and lowering the limiting resistances serially connected to the input power sources in the sequence. 本发明提供了一种热插拔电子设备防浪涌电流及时序控制装置和方法。装置包括：压控电阻装置，串联于电子设备的电源输入端；控制装置，其控制端连接到压控电阻装置的控制端，在电子设备接入电源时，控制压控电阻装置的等效电阻较大，在预定时间后，控制压控电阻装置的等效电阻较小；其中，控制装置包括电容、电阻，以通过控制电容的充放电产生控制端的控制电压。方法包括步骤：确定电子设备不同电压的供电顺序；判断电子设备是否插入，如果插入，根据供电顺序首先降低需要先输入电源的串联限流电阻，然后依次降低依次输入电源的串联限流电阻。利用本发明可以在更换设备时，不会因浪涌影响系统的工作，提高了可靠性。