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8936 데이터 시트보기 (PDF) - Allegro MicroSystems
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8936
VOICE COIL MOTOR DRIVER
Allegro MicroSystems
8936 Datasheet PDF : 10 Pages
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8936
VOICE COIL MOTOR DRIVER
TEST CIRCUIT AND TYPICAL APPLICATION
RZ
Rgm
CZ
VIN
VREF = 2 V
H GAIN
PWR OFF
F
R
AULT
≥
200 k
Ω
ERROR
–
AMP
+
V
CC
I
SENSE +
+5 V
V
DD
V
REF
––
POWER
AMP
+
2V
–
C1
R1
VOICE COIL
MOTOR
POWER
CONTROL
LOGIC
TSD
I
SENSE
–
CURRENT-SENSE
AMP
–
V
REF
+
RS
V
SENS
PROTECTION
CIRCUITRY
RETRACT
CONTROL
QS
WINDOW
COMP.
V
REF
QR
R
5
V
CC
R7
R6
R8
BACK EMF FROM
SPINDLE MOTOR
V
DD
DIODE FOR RETRACT FUNCTION
OTHERWISE SHORT TO SUPPLY
Dwg. EP-043A
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