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PDF M56785FP Data sheet ( Hoja de datos )
| Número de pieza | M56785FP | |
| Descripción | SPINDLE MOTOR DRIVER | |
| Fabricantes | Mitsubishi | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de M56785FP (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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MITSUBISHI <CONTROL / DRIVER IC>
M56785FP
SPINDLE MOTOR DRIVER
DESCRIPTION
The M56785FP is a semiconductor integrated circuit in order to
drive the spindle motor.
FEATURES
q Large power dissipation (Power Package).
q 3.3V DSP available.
q The supply voltage with wide range.
q High motor drive current .
q Low saturation voltage. (typical 1.2V at load current 500mA)
q Motor current control for both motor torque directions.
q Reverse torque mode select [SHORT BRAKING,etc].
q Sleep mode. (Zero total current )
q Hall amplifier sensitivity select.
(Minimum voltage : 35mVp-p or 50mVp-p)
q FG signal output terminal.
q Automatic stop select. (Removable function)
q Reverse detected signal pin.
APPLICATION
CD-ROM,DVD,DVD-ROM,DVD-RAM etc.
PIN CONFIGURATION (TOP VIEW)
N.C
S/S
RDS
FG
CI
MODE2
MODE1
GND
VM
VCC2
EC
ECR
VCC1
HB
N.C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
42 N.C
41 W
40 V
39 U
38 RS
37 MODE3
36 MODE4
35
34
33
32 GND
31
30
29
28 Hw-
27 Hw+
26 Hv-
25 Hv+
24 Hu-
23 Hu+
22 N.C
Outline 42P9R-A
N.C: no connection
BLOCK DIAGRAM
UVW
39 40 41
S/S
2
RS VCC1
38 19
VM 15
VCC2 16
MODE1 7
MODE2 6
BRAKING
MODE
CHANGE
120°
MATRIX
I/I
Converter
MODE4 36
SENSE
MODE3 37
FG 4
RDS 3
FG
RDS
TSD
+-
+-
+-
Hall
Bias
23 24
Hu+ Hu-
25 26
Hv+ Hv-
27 28
Hw+ Hw-
20
HB
5
CI
Vref
V/I Converter
17 18
EC ECR
GND
GND
1 page  
MITSUBISHI <CONTROL / DRIVER IC>
M56785FP
SPINDLE MOTOR DRIVER
HALL AMPLIFIER INPUT AND COMMUTATION
The relationship between the hall amplifier inputs voltage and the
motor current outputs is shown in Figure 2.
Hw+
Hv+
Hu+
Hall
inputs
V U WV
Output
current
U
W
V
U
Hall elements
V
U
SOURSE
W
SINK
W
U
V
W
U
W
V
U
W
V
FORWARD
EC<ECR
Outer loator
REVERSE
EC>ECR
Figure 2.
HALL AMPLIFIER INPUT SENSITIVITY SELECT
MODE4
OPEN or HIGH
GND
120 degree
soft switching
120 degree switching
** Io current
changes sharply.
Figure 3 shows the hall amplifier input sensitivity select function. You are
able to select a sensitivity of a hall amplifier out of two levels which is
suitable for the hall elements type.
If the output minimum level of the hall elements is lower than 50mVp-p,
please connect the MODE4 pin to external GND. In this case, the
output current changes shaply. If the output minimum level of the hall
elements is higher than 50mVp-p, please make the MODE4 pin open,
then the output current is commutated softly.
We recommend that the output level of the hall elements be set between
80mVp-p and 120mVp-p, and the MODE4 pin is an open.
The hallamp
minimum input voltage
is 50 mVp-p.
The hallamp
minimum input voltage
is 35 mVp-p.
Figure 3.
SLEEP MODE FUNCTION
START / STOP ( 2 pin)
LOW or OPEN
HIGH
Motor Stop
Bias off
Hall-Bias of
Motor on
Bias on
Hall-Bias on
Figure 4 shows the sleep mode function. If the 2 pin [S/S] is set to be
open or low, the motor drive outputs have high impedance and the motor
stops. Then, the IC bias current wil be a slight current (please refer to the
electrical characteristics), and the hall bias output will be cut off. When
the 2 pin input is high, all the circuits will work.
Figure 4.
5 Page 
APPLICATION CIRCUIT
Forward reverse
rotation signal FG signal
5V
Hall bias
resistor
HU
HV
HW
MITSUBISHI <CONTROL / DRIVER IC>
M56785FP
SPINDLE MOTOR DRIVER
µcom control
BRAKING
MODE
SELECT
0 to 1.5
10µF
12V
Motor
power
supply
104
104
104
104
Control
PWM1
Reference
PWM2
++ -
8 to 14 and 29 to 35
Start / Stop
Motor current sense resistor
0.5
10µF
5V
Power
Supply
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet M56785FP.PDF ] | |
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