US 11,968,801 B2
Fan control system and method
Ye Liu, Shanghai (CN)
Assigned to INVENTEC (PUDONG) TECHNOLOGY CORPORATION, Shanghai (CN); and INVENTEC CORPORATION, Taipei (TW)
Filed by INVENTEC (PUDONG) TECHNOLOGY CORPORATION, Shanghai (CN); and INVENTEC CORPORATION, Taipei (TW)
Filed on Jun. 23, 2021, as Appl. No. 17/355,927.
Claims priority of application No. 202110267629.2 (CN), filed on Mar. 11, 2021.
Prior Publication US 2022/0295665 A1, Sep. 15, 2022
Int. Cl. H05K 7/20 (2006.01); G05D 23/00 (2006.01); G06F 1/20 (2006.01); G06F 11/30 (2006.01)
CPC H05K 7/20209 (2013.01) [G05D 23/00 (2013.01); G06F 1/206 (2013.01); G06F 11/3062 (2013.01); H05K 7/20172 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A fan control system for use in a server system, the server system comprising a power supply unit, the fan control system comprising:
a first monitoring and protection chip electrically connected to the power supply unit and configured to receive an operating power in a working state of the server system;
a second monitoring and protection chip electrically connected to the power supply unit and configured to receive a standby power in a shutdown state of the server system;
a switch electrically connected to both the first and second monitoring and protection chips;
a plurality of fans all electrically connected to the switch; and
a complex programmable logic device electrically connected to the first monitoring and protection chip, the second monitoring and protection chip, the switch and the plurality of fans, the complex programmable logic device configured to activate the second monitoring and protection chip in response to detecting that the server system is in the shutdown state and switch the switch so that the plurality of fans are connected to the second monitoring and protection chip, receive the standby power therefrom and run at a standby power level, and to activate the first monitoring and protection chip in response to detecting that the server system has been switched to the working state and switch the switch so that the plurality of fans are connected to the first monitoring and protection chip, receive the operating power therefrom and run at a normal power level that is higher than the standby power level,
wherein the complex programmable logic device is directly connected to the plurality of fans.