SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
M56786FP
MITSUBISHI <CONTROL / DRIVER IC>
42
39
40
41
1
4
3
2
385
376
349
33
10
3211
31
12
13
14
30
29
7
8
36
35
15 28
16 27
17 26
18 25
19
20
24
23
21 22
DESCRIPTION
The M56786FP is a semiconductor integrated circuit in order to
drive the spindle motor and 1ch actuator.
FEATURES
●3.3V DSP available.
●Low power dissipation & low motor echo noise.
●Large power dissipation package(Power Package).
●High motor drive current .
●Wide dynamic range.
●Motor current control for both motor torque directions.
●Reverse torque mode select [SHORT BRAKING,etc].
●Sleep mode.
●FG signal output terminal.
●FG pulse select.
●Automatic stop.
●Low saturation voltage
●Wide power supply voltage range(4.5V–13.2V)
APPLICATION
CD-ROM, DVD,DVD-ROM,DVD-RAM etc.
PIN CONFIGURATION
(
TOP VIEW
)
Outline 42P9R-D
Hu+
Hw-
Hv-
Hu-
Hv+
Hw+
MUTE
OUT-
GND
HB
FG
GND
VDD+
VDD-
S/S
M56786FP
BRS
FGS
VCC1
ECR IN-
OUT+
EC IN+
VCC2
RS
CI
TP
W
V
U
GND
GND
VDD+
OUT+
OUT-
VDD-
+- +- +-
RS
TSD
UVW VCC1
EC ECR
Hu+ Hu- Hv+ Hv- Hw+ Hw-
S/S
CI
HB
VCC2
FG
FGS
BRS BRAKING
MODE
CHANGE
CONTROL
TP
REVERSE
DETECT
IN+IN-
B2B1
RR
+
-
CH1
X8
+
-
+
-
GND
FG
&
SELECT
MATRIX
120°
MUTE
HALL
BIAS
Sleep
spm ch1
VDD+
VCC2
VCC2VCC2
VDD-
28 26
16 17 18 19 20 21
23
21
3 740
15
22
4
24
8 to 14 29 to 35
6
5
25
38
36
39
37
4142
27
SPM
BIAS CH1
BIAS
CURRENT
SENSE & LIMIT
BLOCK DIAGRAM
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
M56786FP
MITSUBISHI <CONTROL / DRIVER IC>
ECR The reference voltage for EC
ABSOLUTE MAXIMUM RATING (Ta=25˚C)
Rating
Symbol Conditions Unit
Parameter
RECOMMENDED OPERATING CONDITIONS
Symbol Limits
Power supply 2VCC2Power supply 3
Parameter
VCC1
VDD+
Power supply 1
Unit
Max.Typ.Min. V
V
V
5.55.04.5
4.5
RS
VCC2Motor supply voltage 23 pin 15 V
Power supply 2 voltage
VCC1 Power supply 1 voltage
VDD+ Power supply 3 voltage
Io1 SPM Output current
Io2 ATC Output Current
VH(c) Sensor amp. Differential input range
Vin Maximum voltage of input terminals
Pt Power dissipation
Kθ
Tj
Topr
Tstg
Thermal derating
Junction temperature
Storage temperature
Operating temperature
22 pin
7pin
38 pin
Note 2
Note 2
16 – 21 pins
1, 2, 3, 4, 5, 16 – 21 , 40 pin
23 , 41 , 42 pin
Free Air
Free Air
15
7.0
15
1.2
0.7
4.5
0–VCC1
0–VCC2
1.2
9.6
150
-20–+75
-40–+125
V
V
V
A
A
V
V
V
W
mW/˚C
˚C
˚C
˚C
mA
mA
13.2
13.2
700
700
12.0
12.04.5
Io1
Io2 SPM Output drive current
ACT Output drive current
*Note2 ; The ICs must be operated within the Pt (power dissipation) or the area of safety operation.
*Note3 ; The 25 pin[Tp] is a test terminal. Please make open this terminal.
*Note4 ; Please don't connect directly the external power supply to the 26 ,27 ,28 ,36,39 ,23 ,15 , 6 ,24 pin.
PIN DESCRIPTION
Symbol FunctionPin No. Pin No.
GND
Symbol
Hu+ Hu+ Sensor amp. input
Hu- Hu- Sensor amp. input
Hv+ Hv+ Sensor amp. input
Hv- Hv- Sensor amp. input
Hw+ Hw+ Sensor amp. input
Hw- Hw- Sensor amp. input
GND
RSMotor current sense
U Motor drive output U
V Motor drive output V
S/S Start / Stop for spindle driver
FGS FG pulse select
FG Frequency generator output
CIPhase Compensation
OUT- Inverted output of actuator driver
OUT+ Non-inverted output of actuator driver
GND GND
VCC2 12V supply voltage
EC Motor speed control
VCC1 5V supply voltage
Function
3
4
5
6
15
17
18
19
1
16
23
24
25
26
27
36
38
39
40
22
37
–
29 35
*Pull-up resistors (10kohm) are included in the circuits connected to pin[FG].
*Note1. The pin TP is test terminal. Please make an open the pin TP.
20
21
–
8 14
7
41
42
28
WMotor drive output W
Bias for Hall SensorHB
2
BRS Reverse torque mode select TP Test Note1
VDD- GND of actuator driver
VDD+ Power supply of actuator driver
MUTE Mute of actuator driver
IN+ Non-inverted input of actuator driver
IN- Inverted input of actuator driver
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
M56786FP
MITSUBISHI <CONTROL / DRIVER IC>
ELECTRICAL CHARACTERISTICS
(VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25˚C unless otherwise noted.)
*Note3. The ViM is the limit in case of external voltage input control. The free run mode is selected when the BRS pin is open, too.
mA
µA
V
Limits
Min. Typ. Max.
Symbol Conditions UnitParameter
10
0-60 1.2
-30
+30
1.65
1.65
1.9
+60
120
3.3
0.46
Isleep
Icc
Vsat
ECdead-
ECdead+
ECR
EC
Gio
Vlim
VH com
VHmin
Von
Voff
VHb
IHb
ViH1
ViL1
ViM
Saturation voltage
Control voltage dead zone
Reference voltage Input range
Control voltage Input range
Control gain
Control limit
Hall sensor amp.
input signal level
Hall sensor amp
common mode input range
Motor start voltage
Motor stop voltage
Hall bias terminal output voltage
Hall bias terminal sink current
BRS input high voltage
BRS input middle voltage
BRS input low voltage
Sleep Mode Supply current
Supply current
VCC1 & VCC2 pin total Current
(at S/S pin, MUTE pin low or open)
VCC1 & VCC2 pin total Current
(EC=ECR=1.65V) [S/S pin, MUTE pin High]
Top and Bottom saturation voltage.(Load current:500mA)
EC<ECR
EC>ECR
1pin(it is possible to input 0 to 5V)
Io=Gio/Rsense [A/V]
Ilim=Vlim/Rsense [A]
16 – 21 pins
23 – 28 pins
[S/S]pin input voltage when it starts up the motor.
*The IC is in the active condition.
*The hall bias is available.
Load current (IHb)=10mA.
[S/S]pin input voltage when it stops the motor.
*The IC is in the sleep condition.
*The hall bias is off.
BRS input voltage that the short braking is selected
when the reverse torque.
BRS input voltage that the free run is selected when the
reverse torque.
BRS input voltage that the reverse braking is selected
when the reverse torque.
2pin(it is possible to input 0 to 5V)
0
0
0
0.34
0.27
1.3
60
0.6
2.0
3.6
1.6
0.85
0.3
19
0.4
28
0.33
VCC1-1.3
3.3
30
0.8
2.2
0.8
1.2
mV
V
V
V/V
V
V
mVp-p
V
mA
V
V
V
V
V
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
M56786FP
MITSUBISHI <CONTROL / DRIVER IC>
ELECTRICAL CHARACTERISTICS
(VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25˚C unless otherwise noted.)
V
Limits
Min. Typ. Max.
Symbol Conditions Unit
Parameter
0.8ViL2Logic input
Low voltage [FGS] input voltage when it is LOW.
V
V
0.5
2.0
at Io current=1mA
[FGS] input voltage when it is HIGH.
VOL
ViH2
[FG] pin
output low voltage
Logic input
high voltage
ELECTRICAL CHARACTERISTICS
(VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25˚C unless otherwise noted.)
V
Limits
Min. Typ. Max.
Symbol Conditions UnitParameter
1.0
mV
V
47-47Voff2
Vsat2
VinIN
IinIN
Vmute-on
Vmute-off
Imute
Gain
output offset voltage
ACT Saturation voltage
IN-,IN+ input current
Mute-on voltage
Mute-off voltage
Mute terminal input current
Voltage Gain between input and output
Top and Bottom saturation voltage.
Load current 0.5A (bootstrap)
IN(+)= IN(-)= 1.65V
IN(+) = IN(-) = 1.65V
Mute-on
Mute-off
Mute terminal input current
(at 5V input voltage)
{OUT(+)–OUT(-)}
(IN(+) - IN(-))
VCC2 = 12 V
VCC2 = 5 V
VDD+ = 5 V
IN-,IN+ input voltage range
7.2
0
0
-2
2.0
0.7
8.0 8.8
8.0
3.0
0
0.8
250
V/V
V
µA
V
V
µA
THERMAL CHARACTERISTICS
(VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25˚C unless otherwise noted.)
˚C
Min. Typ. Max.
Symbol Function start temperature
of IC Unit
Parameter
TSD Thermal Shut Down
Function stop temperature
of IC
Min. Typ. Max.
165 125
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
M56786FP
MITSUBISHI <CONTROL / DRIVER IC>
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.
THE RELATIONSHIP WITH I/O CONTROL AND
THE BRAKING MODE
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.
0
0–+60mV
0–-60mV
Current limit
0.8A/V
0.8A/V
Current limit
EC - ECR
BRS=LOW
Forward Torque
Reverse Torque
REVERSE BRAKING
Figure 1.
0
0–-60mV
0.8A/V
Current limit
EC - ECR
BRS=Hi
Forward Torque
SHORT BRAKING
Reverse Torque
Figure 2.
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.
0
0–-60mV
0.8A/V
Current limit
EC-ECR
BRS=Open
FREE RUN
Forward Torque
Figure 3.
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
M56786FP
MITSUBISHI <CONTROL / DRIVER IC>
This IC's package is POWER-SSOP, so improving the board on
which the IC is mounted enables a large power dissipation without
a heat sink.
For example, using an 1 layer glass epoxy resin board, the IC's
power dissipation is 2.9W at least. And it comes to 4.1W by using
an improved 2 layer board.
The information of the H, I, J type board is shown in the board
information.
THERMAL DERATING
Ambient Temperature Ta (˚C)
Power Dissipation (Pdp)
0 25 50 75 100 125 150
1.0
2.0
3.0
4.0
5.0
6.0
(W) 4.1W
using H-type board
3.1W
using I-type board
2.9W
using J-type board
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
M56786FP
MITSUBISHI <CONTROL / DRIVER IC>
The relationship between the hall amplifier inputs voltage and the
motor current outputs is shown in Figure 4.
HALL AMPLIFIER INPUT AND COMMUTATION
Figure 4.
It is possible for user to switch the output pulse numeric by external
logic control using FG pulse select terminal [FGS].
Figure 6 shows the FG pulse select function.
The FG pin outputs the square pulse signal synchronizing with the
hall inputs [Hv+ and Hv-] timming when FGS=LOW or OPEN.
When FGS=HIGH, it outputs the square pulse signal of 3 times.
The FG pin is pulled-up to VCC1 by an internal resistor [typ.
10Kohm].
FG FUNCTION
Figure 6.
Figure 5.
It is possible to select three kinds of mode [the reverse braking, the
short braking and the free run] in reverse torque by logic control
using the BRS terminal.
Figure 5 shows the function table of the braking mode select.
It is the reverse braking when BRS is LOW, the short braking when
BRS is HIGH and the free run when BRS is OPEN.
OPEN
Braking mode select [BRS] pin
LOW
HIGH SHORT BRAKE
FREE RUN
REVERSE BRAKE
BRAKING MODE SELECT FUNCTION
FG pulse select (FGSpin)
LOW or OPEN HIGH
NX1 pulse NX3 pulse
Figure 7.
S/S MUTE
H H
H L,OPEN
H
Spindle
Hall bias Actuator
CIRCUIT BIAS
CIRCUIT TSD
CIRCUIT
OFF
ON OFF
ON ON
OFF
L,OPEN
L,OPEN L,OPEN
S/S MUTE
OFF
ON
ON
ON
ON
OFF
ON
ON
ON
OFF
This IC has the S/S terminal (S/S) for ON/OFF of the Spindle motor
drive and the MUTE terminal (MUTE) for ON/OFF of the actuator
drive.
It is possible to control ON / OFF of each circuit (SPM, Actuator) by
external logic inputs.
The figure 7 shows its function.
In case of both S/S and MUTE is LOW or OPEN, the bias of all
circuit becomes OFF[Current is zero].
Therefore, this mode is available in order to reduce the power
dissipation when the waiting mode.
SLEEP MODE FUNCTION and MUTE FUNCTION
Hu+Hv+Hw+
U
W
V
U
W
W
V
U
V
U
V
W
Hall elements
Outer loator
FORWARD
EC<ECR
REVERSE
EC>ECR
SINK
SOURSE
Output
current
Hall
inputs
U WV V
UV WWU
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
M56786FP
MITSUBISHI <CONTROL / DRIVER IC>
I/O CHARACTERISTICS of ACTUATOR DRIVE PART
Figure 8.
The power amplifiers of CH1 is shown in Figure 8.
The power supplies is VDD+ and VDD-. Generally, the VDD- pin is
connected to GND(0V). Also, it is possible to be connected to other
power supply larger than 0 volts (ex:5V).
The source side of the power amplifier output stage consists of a
PNP and a NPN. The emitta of the PNP is connected to VCC2. So,
the power of the PNP supplies can be adjusted externally.
VDD+
+
-
+
-
+
-
20K
20K
6K 24K
6K 24K
6K 24K
6K 24K
Vrefm
Vrefm Amp.
Input Buffer
IN-
IN+
VM+
VM-
<OUTPUT>
Reference 1.65V
1.65V
VDD-
CH1 power amplifier output terminal equivalent circuit
(OUT+
OUT-)
VCC2
GND
VDD+
VDD-
0.2V
VM-
0.8V
VM+
0.8V
Vrefm
1.65V
Gain=x8
<INPUT>
IN+
Vrefm= [(VDD+)+(VDD-)] / 2
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
M56786FP
MITSUBISHI <CONTROL / DRIVER IC>
(1) Hall input amplifier
I/O terminal equivalent circuit
(Hu+, Hu-, Hv+, Hv-, Hw+, Hw-)
I/O terminal E
q
uivalent circuit
GND
2K
GND
(3)FG output terminal equivalent circuit
(FG)
VCC1
10K
(2)IN+, IN-, EC, ECR input terminal equivalent circuit
(IN+, IN-)
GND
VCC1
VCC1
2K GND
(EC,ECR)
GND
VCC2
VCC2
2K GND
(4)HB output terminal equivalent circuit
GND
(HB)
VCC1
(6)S/S, MUTE,FGS input terminal equivalent circuit
GND
VCC1
GND
2 K
24K
18K
(S/S, MUTE)
10K
GND
VCC1
GND
2 K
(FGS)
18K
24K
10K
(7)Spindle driver output stage equivalent circuit VCC2
U
RS
GND
VW
(5)BRS input terminal equivalent circuit
(BRS)
VCC1
GND
10K
10K
3K
2K
GND
VCC1
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
M56786FP
MITSUBISHI <CONTROL / DRIVER IC>
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21 22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
MUTE
OUT-
GND
FG
GND
VDD+
VDD-
S/S
M56786FP
BRS
FGS
VCC1
1
2
3
37
38
39
40
41
42ECR IN-
OUT+
EC IN+
Hu+
Hw-
Hv-
Hu-
Hv+
Hw+
HB
VCC2
RS
CI
TP
W
V
U
10uF12V
10uF5V
Hv
Hw
Hu
104104 104
M
TO 5V OR 12V
POWER SUPPLY
CTL
REF
CTL
REF
PWM1
PWM2
PWM1
PWM2
EC, ECR, IN-, IN+ input application
APPLICATION CIRCUIT
The 25 pin (TP) is test terminal !
Please make an open this terminal !
*note 104
0.5
*Rh b
*The Rh b is a resistor in order to adjust the hall output voltage.
Please fix as to be 100–130mV for hall output voltage.
These are the application circuits of input for the EC,ECR,
IN- and IN+.
