4-Wire Pulse Width Modulation (PWM) Controlled Fans Specification
4
Figures
Figure 1. Screen Shot of PWM Duty Cycle......................................................................11
Figure 2 Minimum Fan Speed Requirements: Start Pulse ...............................................13
Figure 3 Fan Speed Response to PWM Control Input Signal ..........................................14
Figure 4 Type A Operation, Minimum RPM, Stay on at Minimum RPM........................... 15
Figure 5 Type B Operation, Stay On at Minimum RPM, Off at 0% RPM.......................... 16
Figure 6 Type C, Operation below Minimum RPM, Min, RPM = Starting RPM................ 17
Figure 7 Connector Housing.............................................................................................24
Figure 8 Baseboard Connector.........................................................................................25
Tables
Table 1 Connector Pinout ................................................................................................. 19