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FAN8621B Datasheet(Scheda tecnica) 3 Page - Fairchild Semiconductor

Numero della parte FAN8621B
Dettagli  12V Spindle Motor and Voice Coil Motor Driver IC
Download  21 Pages
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Produttore  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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FAN8621B
3
Pin Definitions
Pin Number
Pin Name
IO
Pin Function Description
1
VCNT
A
Speed controller output. Range 3.8V to 0.5V
2
CSOFT
A
Capacitor for soft commutation
3
ADJ
A
Adjust external regulator voltage (VREF)
4
SENSE5
A
5V power line sensing
5
VDD
P
5V power line
6
FG
O
Frequency generation for spindle rotation speed. Typically
1.08KHz (5400RPM)
7
VREF
P
Regulator voltage output. This voltage is controlled by pin 3
voltage
8
CLK
I
System clock. Digital clock input as a time reference
9
HALFVCC
P
1/2 VCC
10
POR
O
Power on reset. H : normal, L: power fail
11
CDLY
A
Define POR delay time
12
GAINSEL
I
Sense amplifier gain selection. H : High gain (8), L : Low gain (2)
13
PWMH
I
Coarse PWM input for VCM set point
14
PWML
I
Fine PWM input for VCM set point
15
CFVCM
A
Output of PWM inputs to voltage converter
16
VCMREF4V
P
4V reference output for VCM
17
CRET
A
Define retract delay time.
18
VCC
P
12V power line
19
FILOUT
A
Filtered output of PWM inputs. This voltage define VCM set point
20
SENSE
A
Non-inverting input of differential amplifier for VCM current
sensing
21
CRET2
A
Power for retract when power down
22
PVCC
P
12V power line for VCM
23
VCM-
A
Negative output terminal of VCM power amplifier
24
RRET
A
Adjust maximum retract current
25
SENSEOUT
A
Output of differential amplifier for VCM current sensing
26
PGND
P
Ground for VCM
27
VCM+
A
positive output terminal of VCM power amplifier
28
ERRIN
A
Inverting input of VCM error amplifier
29
VDD
P
5V power line
30
ERROUT
A
Output of VCM error amplifier
31
SUBGND
P
Ground for spindle motor
32
W
A
Spindle W phase output




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