![](/images/backgrounds/110365/110365-12486x1.png)
Active Tower Thermal Solution
The power header on the baseboard must be positioned to allow the fan power cable to reach it. The power header identification and location should be documented in the platform documentation, or on the system board itself. Figure
Figure
Pin Signal
1GND
2+12 V
3SENSE
4CONTROL
Straight square pin,
0.100" pitch, 0.025" square pin width.
Match with straight pin, friction lock header on mainboard.
1 2 3 4
Table
Description | Min | Typ | Max | Unit | Notes |
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+12V: 12 volt fan power supply | 9.0 | 12.0 | 13.8 | V | — |
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IC: |
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| — |
• Maximum fan | — | 1.2 | — | A |
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• Maximum fan | — | 3.0 | — | A |
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SENSE: SENSE frequency | — | 2 | — | pulses per fan | 1 |
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| revolution |
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CONTROL | 21 | 25 | 28 | kHz | 2, 3 |
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Notes: |
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1.Baseboard should pull this pin up to 5V with a resistor.
2.Open drain type, pulse width modulated.
3.Fan will have
Figure
| R110 |
B | [4.33] |
|
C
86 | Thermal/Mechanical Specifications and Design Guidelines |