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FAN8728 데이터 시트보기 (PDF) - Fairchild Semiconductor
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FAN8728
Spindle + 4-CH Input PWM Motor Drive IC
Fairchild Semiconductor
FAN8728 Datasheet PDF : 26 Pages
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Calculation of Gain & Torque Limit Current
FAN8728
EC
ECR
-
Gm
+
VM1
Current / Voltage
Convertor
−
Vin
+
Absolute
Values
Negative
Feedback loop
R1
−
+ Driver
+
+
Vmax
−
VM
Max. output current limiting
VM1
I
O
R
CS
−
V
S
Output
Current sense
+
CS1 (Pin 11)
Power
Transistors
U
I
O
V
W
Commutation
Distributor
H1 H2 H3
8-,99 " % & " !) " %: 6-
Gain
0
.
3
5
5
R
CS
.: " 3 34 " " ,98.-
Itl
[
mA
]
V
m
a
x
3
5
0
[
m
V
]
R
CS
R
CS
Application Information
1. Mute Function
) & .
; " %+ " " %"-
MUTE123,4 ON
Voltage
MUTE123,4 OFF
Voltage
2.5[V] above
OPEN or 0.5[V] below
Mute function operation
Normal operation
* &
" " " % -
; " (0 % " 3 )<.=+ " "
" 7-
; " 3 *-9<.=+ " " " 3 -
6% > "" 3 )?9
°
+ " "
" #$ " , " -
, -
6! " " ## -
11
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