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PDF M56786FP Data sheet ( Hoja de datos )
| Número de pieza | M56786FP | |
| Descripción | SPINDLE MOTOR AND 1CH ACTUATOR DRIVER | |
| Fabricantes | Mitsubishi | |
| Logotipo |  |
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MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
DESCRIPTION
The M56786FP is a semiconductor integrated circuit in order to
drive the spindle motor and 1ch actuator.
FEATURES
q 3.3V DSP available.
q Low power dissipation & low motor echo noise.
q Large power dissipation package(Power Package).
q High motor drive current .
q Wide dynamic range.
q Motor current control for both motor torque directions.
q Reverse torque mode select [SHORT BRAKING,etc].
q Sleep mode.
q FG signal output terminal.
q FG pulse select.
q Automatic stop.
q Low saturation voltage
q Wide power supply voltage range(4.5V–13.2V)
APPLICATION
CD-ROM, DVD,DVD-ROM,DVD-RAM etc.
PIN CONFIGURATION (TOP VIEW)
ECR 1
EC 2
S/S 3
BRS 4
FGS 5
FG 6
VCC1
7
8
9
10
GND 11
12
13
14
HB 15
Hu+ 16
Hu- 17
Hv+ 18
Hv- 19
Hw+ 20
Hw- 21
42 IN-
41 IN+
40 MUTE
39 OUT-
38 VDD+
37 VDD-
36 OUT+
35
34
33
GND
32
31
30
29
28 U
27 V
26 W
25 TP
24 CI
23 RS
22 VCC2
Outline 42P9R-D
BLOCK DIAGRAM
CI 24
RS 23
VCC2 22
CURRENT
SENSE & LIMIT
U
28
4
BRS
BRAKING
MODE
CHANGE
REVERSE
DETECT
6
FG
5
FGS
FG
&
SELECT
+-
16 17
Hu+ Hu-
V
27
120°
MATRIX
+-
18 19
Hv+ Hv-
W S/S
MUTE
26 3 40
EC ECR
21
VCC1
7
GND
CONTROL
RR
SPM
BIAS
VDD-
CH1
BIAS
Sleep
VDD+
-+
VCC2
CH1
+
-
spm
+-
TSD
ch1
HALL
BIAS
X8
VCC2
+
-
VCC2
B1 B2
20 21
15
42 41
25
Hw+ Hw-
HB
IN- IN+
TP
GND
GND
38 VDD+
36 OUT+
39 OUT-
37 VDD-
1 page  
THE RELATIONSHIP WITH I/O CONTROL AND
THE BRAKING MODE
BRS=LOW
Current limit
REVERSE BRAKING
Reverse Torque
0–+60mV
0.8A/V
0.8A/V
Forward Torque
Figure 1.
0
EC - ECR
0– -60mV
Current limit
MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
The braking mode is selected flexibly by using the BRS terminal.
The relationship between the EC-ECR (the difference between
EC<(control voltage> and ECR<reference voltage>) and the torque
is shown in Figure 1,2 and 3.
The current gain is 0.8A/V(at sensing resistor:0.5ohm) in forward
torque directions, and the dead zone is from0mV to 60mV.
When the reverse brake mode(BRS=Lo) is selected, the coil
current gain under the reverse torque control is the same with in
forward torque directions.
BRS=Hi
SHORT BRAKING
Reverse Torque
When the short brake mode(BRS=Hi) is selected, the coil current
under the reverse torque control depends on the back emf. and the
coil resistance.
0 EC - ECR
0.8A/V
Forward Torque
Figure 2.
0–-60mV
Current limit
BRS=Open
0.8A/V
FREE RUN
0
EC-ECR
0–-60mV
Forward Torque
Figure 3.
Current limit
When the free run mode(BRS=open) is selected, the coil current
under the reverse torque control (EC-ECR>0) becomes zero and in
free run situation.
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet M56786FP.PDF ] | |
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