Design Guide
Page 125
... duration Fan header voltage Tachometer output Tachometer output signal PWM signal input frequency PWM signal pull up in Sections 5.2 and 6.3, the fan must be within spec for fans. Thermal and Mechanical Design Guidelines 125 See the Fan Specification for 4-wire PWM Controlled Fans for additional details on , 2 minutes off cycles with...
... duration Fan header voltage Tachometer output Tachometer output signal PWM signal input frequency PWM signal pull up in Sections 5.2 and 6.3, the fan must be within spec for fans. Thermal and Mechanical Design Guidelines 125 See the Fan Specification for 4-wire PWM Controlled Fans for additional details on , 2 minutes off cycles with...