300 Datasheet, PDF (92/95 Pages) DB Lectro Inc – SCREW TYPE SERIES

Boxed Processor Specifications
Note:
The boxed processor’s fan heatsink requires a constant +12 V supplied to pin 2 and
does not support variable voltage control or 3-pin PWM control.
The power header on the baseboard must be positioned to allow the fan heatsink 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 21 shows the
location of the fan power connector relative to the processor socket. The baseboard
power header should be positioned within 4.33 inches from the center of the processor
socket.
Figure 20. Boxed Processor Fan Heatsink Power Cable Connector Description
Pin Signal
1 GND
2 +12 V
3 SENSE
4 CONTROL
Straight square pin, 4-pin terminal housing with
polarizing ribs and friction locking ramp.
0.100" pitch, 0.025" square pin width.
Match with straight pin, friction lock header on
mainboard.
1 2 34
Table 35.
Fan Heatsink Power and Signal Specifications
Description
Min Typ
+12 V: 12 volt fan power supply
IC:
Peak Fan current draw
Fan start-up current draw
Fan start-up current draw maximum
duration
10.2
12
—
1.1
—
—
—
—
SENSE: SENSE frequency
—
2
CONTROL
21
25
NOTES:
1. Baseboard should pull this pin up to 5 V with a resistor.
2. Open Drain Type, Pulse Width Modulated.
3. Fan will have a pull-up resistor to 4.75 V, max 5.25 V.
Max
13.8
1.5
2.2
1.0
—
28
Unit
V
Notes
-
A
A
-
Second
pulses per
fan
1
revolution
kHz
2, 3
92
Datasheet