Intel Thermal/Mechanical Reference Design Information
Thermal and Mechanical Design Guidelines
43
5.1.6
Pump Motor Performance
The pump power requirements for proper operation are given Table 5
Table 5. Pump Electrical Performance Requirements
Requirement Value
Maximum Average motor current draw
1.5 A
Motor start-up current draw
2.2 A
Motor header voltage
12 V ±5%
Tachometer output
3 pulse per revolution
Tachometer output signal
Open-collector (open-drain)
Tachometer output signal current sink capability
10 mA
PWM signal input frequency
25 kHz (nominal)
21 kHz to 28kHz (allowable range)
PWM signal pull up in fan
3.3 V (recommended max)
5.25 V (absolute max)
PWM signal current source
Imax = 5 mA
(short circuit current)
PWM signal maximum voltage for logic low
VIL = 0.8 V
PWM compliant function
RPM must be within spec for specified
duty cycle
In addition to comply with overall thermal requirements (see section
5.1.1), the pump
should meet the environment reliability requirements (see Section
5.2).
Summary of Contents for QX68000 Core 2 Extreme
Page 30: ...LGA775 Socket Heatsink Loading 30 Thermal and Mechanical Design Guidelines...
Page 74: ...Heatsink Clip Load Metrology 74 Thermal and Mechanical Design Guidelines...
Page 76: ...Thermal Interface Management 76 Thermal and Mechanical Design Guidelines...
Page 96: ...Case Temperature Reference Metrology 96 Thermal and Mechanical Design Guidelines...
Page 108: ...Legacy Fan Speed Control 108 Thermal and Mechanical Design Guidelines...
Page 112: ...BTX System Thermal Considerations 112 Thermal and Mechanical Design Guidelines...
