Datasheet

■ Airflow - Static Pressure Characteristics
0
0.5
1.5
1.0
2.0
0
400
300
200
100
0.2
600
500
0.4 0.6 0.8 1.0 1.2
2.5
0 10
700
20 30 40 50
0
0.5
1.5
1.0
2.0
0
400
300
200
100
0.2
600
500
0.4 0.6 0.8 1.0 1.2
2.5
700
0 10 20 30 40 50
Airflow
12 VDC PWM duty cycle 100%
Static pressure
Airflow
Static pressure
・ PWM duty cycle
・
Operating voltage range
(CFM)
(m
3
/min)
(Pa)
(inch H
2
O)
(CFM)
(m
3
/min)
(Pa)
(inch H
2
O)
PWM duty cycle
100%
50%
20%
12 V
13.2 V
10.8 V
■ PWM Duty - Speed Characteristics Example
1000
5000
3000
4000
2000
7000
6000
8000
9000
10000
Fan speed
PWM duty cycle
Voltage: 12
VDC
PWM frequency: 25 kHz
(min
-1
)
9200 min
-1
(%)
1000
■ PWM Input Signal Example
Input signal waveform
T
T
1
V
IL
V
IH
T
× 100
T
1
T
1
V
IH
= 4.75 to 5.25 V V
IL
= 0 to 0.4 V
PWM duty cycle (%) = PWM frequency 25 (kHz) =
Current source (Isource) = 2 mA max. (when control voltage is 0 V)
Current sink (Isink) = 1 mA max. (when control voltage is 5.25 V)
Control terminal voltage = 5.25 V max. (when control terminal is open)
When the control terminal is open,
fan speed is the same as when PWM duty cycle is 100%.
Either TTL input, open collector or open drain can be used for
PWM control input signal.
■ Example of Connection Schematic
Inside of fan
Input voltage
PWM input signal
Control
○＋
Isource
Isink
○－
■ Specifications for Pulse Sensors
T
0
T
1
0 V
V
OL
V
OH
T
2
T
3
T
4
○－
○＋
Output circuit: Open collector
T
1 to 4
≒ (1/4) T
0
T
1 to 4
≒ (1/4) T
0
= 60/4N (s)
N = Fan speed (min
-1
)
(One revolution)
Inside of fan
In case of steady running
Output waveform (Need pull-up resistor)
Ic
Sensor output
(V
CE
)
Sensor Pull-up resistor
Pull-up voltage
V
CE
= +13.2 V max.
Ic = 5 mA max. [V
OL
= V
CE
(SAT) = 0.6 V max.]
ø
70 × 20 mm
3 V
10 kΩ
100 kΩ