Mitsubishi M56745FP Datasheet
MITSUBISHI <CONTROL / DRIVER IC>
)
M56745FP
SPINDLE MOTOR DRIVER
DESCRIPTION
The M56745FP is a semiconductor integrated circuit designed for a
single chip controller for CD-ROM spindle motor.
M56745FP has a both (forward and reverse) motor rotation control
by the motor speed control terminal.
Also, this device includes a bias circuit for Hall Sensor, a current
limit circuit and a thermal shut down function.
FEATURES
●The supply voltage with wide range.
(4.5V to 13.2V)
●High motor drive current (1.0A).
● Motor current control for the both motor rotation is possible.
APPLICATION
CD-ROM
PIN CONFIGURATION(TOP VIEW
N.C
GND
S/S
1
2
3
4
7
8
10
VM
13
C
I
14
EC
15 22
ECR
16
Vcc
17
Hb
18
36
35
34
33
325
316
30
M56745FP
29
289
27
2611
2512
24
23
21
20
19
W
V
U
Rs
Rnf
M.GND
GND
HwHw+
HvHv+
HuHu+
BLOCK DIAGRAM
13
VM
GND
U
34
+-
V M.GndRs Rnf
120˚
MATRIX
W
+- +-
Hall
Bias
S/S
TSD
1
I/I
converter
Outline 36P2R-D
Vref
+
-
V/I converter
N.C: No connection
31323335 36
Vcc
17
1819 20 21 22 23 24
Hb
14 15 16
CI
EC ECRHu+ Hu- Hv+ Hv- Hw+ Hw-
)
PIN FUNCTION
Pin No. FunctionSymbol
1
S/S
2
N.C
3
N.C
4
N.C
5
N.C
N.C
6
7 12
to
13
14
15
16
17
18
19
20
21
22
23
24
25
to
31
32
33
34
35
36
GND
VM
C
I
EC
ECR
Vcc
Hb
Hu+
HuHv+
HvHw+
HwGND
30
M.GND
Rnf
Rs
U
V
W
MITSUBISHI <CONTROL / DRIVER IC>
M56745FP
SPINDLE MOTOR DRIVER
Start / Stop
GND
Motor supply voltage
Phase Compensation
Motor speed control
The reference voltage for EC.
5V supply voltage.
Bias for Hall Sensor
Hu+ Sensor amp. input
Hu- Sensor amp. input
Hv+ Sensor amp. input
Hv- Sensor amp. input
Hw+ Sensor amp. input
Hw- Sensor amp. input
GND
Motor GND.
Current feedback amp. input
Motor current sense.
Motor drive output U
Motor drive output V
Motor drive output W
ABSOLUTE MAXIMUM RATINGS(Ta=25˚C
Symbol Ratings
VM
Vcc
Io
VH(c) 4.5
Pt
Kθ
Tj
Topr
Tstg
Motor supply voltage
5V supply voltage
Output current
Sensor amp. Differential input range
Power dissipation
Thermal derating
Junction temperature
Operating temperature
Storage temperature
Parameter
13
pin maximum input voltage
17
pin maximum input voltage
19 24
to pins
Free Air
Free Air
Conditions
-20 – +75
-40 – +125
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter
Vcc
VM
Io
5V Power supply
Motor Power supply
Output drive current
Min.
10.8
Limits
Typ.
12.0
Max.
5.5
13.2
700
Units
V5.04.5
V
mA
14
7.0
1.0
1.2
9.6
150
Units
V
V
A
V
W
mW/˚C
˚C
˚C
˚C
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