Data Sheet

SUNONWEALTH
Page 9 of 16
Unit
KHz
V
V
mA
%
100
PWM Duty Cycle (%)
FAN Speed R.P.M.
Parameter
3.PWM Duty Cycle VS Speed ( Ta = 25 ,Vcc =Rated Volt.,fpwm= 25 KHz)
2. Duty Cycle D.C. :
1. Period :
11000 ± 1650
50 5600 ± 1120
Min Max
0
0.8
--
V
L
0 --
5.5
V
H
2.4
20 25 30 f pwm
PWM INPUT WAVEFORM
0
Electrical Characteristics ( Ta = 25 Vcc =Rated Volt.)
Typical
Isource -- 0.6 --
D.C. 20
* The speed is default to be maximum if PWM input pin is unconnected.
-- 100
unstable fan speed.
* Min. start up duty cycle is
20%
. Please don't apply
1 ~ 19%
duty cycle to prevent the
. t2 (sec) t1
1
T
f
PWM
+==
t 1 t2
T
V
V
H
V
L
. 1 0 0 ( % )
T
t1
1 0 0
t2t 1
t 1
∗=∗
+
Ground
Isource
PWM Input
Vcc = rated volt.
FanSystem
IC
PWM INPUT SIGNAL
2017.11.24
D.C.C.