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Block Diagram
71
STM
M
SWICHING
Commutation
PWM
CIRCUIT
SPM
V/V converter
+-
CTL
SLIDE2
V/V converter
+
-
CTL
+
-
CTL
SL1+
SL1-
SL1IN
SL2+
SL2-
SL2IN
REF
SPIN
FG
U
V
W
FOIN
FO+
FO-
TRIN
TR+
TR-
VM2
SLIDE1
V/V converter
PWM
CIRCUIT
PWM
CIRCUIT
Current
sense
Current
sense
Current
sense
GND
GND
DSP
DSP
DSP
DSP
DSP
DSP
DSP
B
T
L
A
M
P
C
u
r
r
e
n
t
c
h
o
p
p
e
r
P
W
M
C
u
r
r
e
n
tc
h
o
p
p
e
r
P
W
M
SPLIM
DSP
5VCC
SLLIM
commutation
STARTER
CLK
TLIN
TL+
TL-
STTH
Current gain
0.88 A/V
B
T
L
A
M
P
B
T
L
A
M
P
OUTPUT Ron
1ohm
OUTPUT Ron
1.5ohm
OUTPUT Ron
1.5ohm
OUTPUT Ron
1.5ohm
OUTPUT Ron
1.8 ohm
6.4MHz
Frequency
75KHz
Frequency
75KHz
Frequency
150KHz
Current gain
0.88 A/V
Current gain
3A/V
0.6A/V
OUTPUT Ron
1.8 ohm
For /FO/TR/TILT
VM1
GND
BACK EMF
DETECTER
TSD
S
I
N
C
ur
r
e
nt
c
ho
p
pe
r
P
WM
For SPINDLE
For SLIDE
7-13.2V
7-13.2V
4.5-5.5V
FG(x3)
Reverse detect
Voltage gain
x 12
Voltage gain
x 12
Voltage gain
x 12
LO+
LO-
VM3
DSP
M
OUTPUT Ron
1.5ohm
GND
H Bridge
+ -
EN 1
DSP
EN 2
DSP
For LOADING
4.5-5.5V
7-13.2V
TEST
SPGS
Gain Select
(SPM)
ENABLE
COMMON
ACTRST
ACTFLG
DSP
DSP
Pickup Protect
TEST mode