Fan control circuit

The invention discloses a fan control circuit used for controlling startup of fans in batches by receiving a PWGD (Power Good) signal. The fan control circuit comprises a first control circuit, a time delay circuit, and a second control circuit, wherein both the first control circuit and the time delay circuit are used for receiving the PWGD signal; the time delay circuit after receiving the PWGD signal outputs a time delay signal to the second control circuit; and the first control circuit and the second control circuit respectively provide work voltages for fans in each group. The fan control circuit, disclosed by the invention, has the advantages of preventing impact from simultaneous startup of multiple fans to a system power supply, and thereby enabling a system power source to be steadier.