Intel 4 515/515J JM80547PE0771M Manuale Utente

92

The fan heatsink outputs a SENSE signal that is an open-collector output that pulses at a rate of 
2 pulses per fan revolution. A baseboard pull-up resistor provides V

OH

 to match the system board-

mounted fan speed monitor requirements, if applicable. Use of the SENSE signal is optional. If the 
SENSE signal is not used, pin 3 of the connector should be tied to GND.

The fan heatsink receives a PWM signal from the motherboard from the 4th pin of the connector 
labeled as CONTROL.

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. 

 shows the location of the fan power 

connector relative to the processor socket. The baseboard power header should be positioned 
within 110 mm [4.33 inches] from the center of the processor socket.

+12 V: 12 volt fan power supply

10.2

12

13.8

V

-

IC: 

Peak Fan current draw

Fan start-up current draw     

Fan start-up current draw maximum duration

—

1.1

—

—

1.5

2.2

1.0

A

A

Second

-

SENSE: SENSE frequency

—

2

—

pulses per fan 

revolution

1

1.

Baseboard should pull this pin up to 5V with a resistor.

CONTROL

21

25

28

kHz

2, 3

2.

Open drain type, pulse width modulated.

3.

Fan will have pull-up resistor to 4.75 V maximum of 5.25 V.

Boxed_Proc_PwrCable

Pin

Signal

1 2 3 4

1

2

3

4

GND

+12 V

SENSE
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.