MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
DESCRIPTION
PIN CONFIGURATION (TOP VIEW)
The M56786FP is a semiconductor integrated circuit in order to
drive the spindle motor and 1ch actuator.
ECR
1
42
IN-
EC
2
41
IN+
S/S
3
40
MUTE
BRS
4
39
OUT-
FGS
5
38
VDD+
FG
6
37
VDD-
VCC1
7
36
OUT+
8
35
9
34
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)
M56786FP
●
●
●
●
●
●
●
●
●
●
●
●
●
10
GND
11
APPLICATION
12
CD-ROM, DVD,DVD-ROM,DVD-RAM etc.
33
32
GND
31
13
30
14
29
HB
15
28
U
Hu+
16
27
V
Hu-
17
26
W
Hv+
18
25
TP
Hv-
19
24
CI
Hw+
20
23
RS
Hw-
21
22
VCC2
Outline 42P9R-D
BLOCK DIAGRAM
RS
23
VCC2
22
W
28
27
26
MUTE
3
ECR
EC
40
1
2
CURRENT
SENSE & LIMIT
4
CONTROL
BRAKING
MODE
CHANGE
R
VDD+
120°
-
VDD-
REVERSE
DETECT
VCC2
Sleep
spm
+
-
FG
&
SELECT
+
-
+
X8
-
VCC2
VCC2
HALL
BIAS
GND
38
VDD+
36
OUT+
39
OUT-
37
VDD-
+
ch1
5
FGS
+
-
CH1
TSD
6
GND
+
CH1
BIAS
SPM
BIAS
MATRIX
FG
7
GND
R
BRS
VCC1
29 to 35
24
V
8 to 14
CI
S/S
U
B1
B2
16
17
18
19
20
21
15
42
41
25
Hu+
Hu-
Hv+
Hv-
Hw+
Hw-
HB
IN-
IN+
TP
MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
PIN DESCRIPTION
Pin No.
Function
ECR
The reference voltage for EC
22
2
EC
S/S
BRS
FGS
FG
VCC1
GND
HB
Hu+
HuHv+
HvHw+
Hw-
Motor speed control
Start / Stop for spindle driver
Reverse torque mode select
FG pulse select
Frequency generator output
5V supply voltage
GND
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
23
4
5
6
7
–
14
15
16
17
18
19
20
21
Symbol
Pin No.
1
3
8
Symbol
24
25
26
27
28
29
–
36
37
38
39
40
41
42
35
Function
VCC2
RS
CI
12V supply voltage
Motor current sense
Phase Compensation
TP
W
V
U
GND
Test
Note1
Motor drive output W
Motor drive output V
Motor drive output U
GND
OUT+
VDDVDD+
OUTMUTE
IN+
IN-
Non-inverted output of actuator driver
GND of actuator driver
Power supply of actuator driver
Inverted output of actuator driver
Mute of actuator driver
Non-inverted input of actuator driver
Inverted input of actuator driver
*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.
ABSOLUTE MAXIMUM RATING (Ta=25˚C)
Symbol
RS
VCC2
VCC1
VDD+
Io1
Io2
VH(c)
Parameter
Motor supply voltage
Power supply 2 voltage
Power supply 1 voltage
Power supply 3 voltage
SPM Output current
ATC Output Current
Sensor amp. Differential input range
Vin
Maximum voltage of input terminals
Pt
Kθ
Tj
Topr
Tstg
Power dissipation
Thermal derating
Junction temperature
Operating temperature
Storage temperature
Conditions
23 pin
22 pin
7 pin
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
*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.
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC1
VCC2
VDD+
Io1
Io2
Parameter
Power supply 1
Power supply 2
Power supply 3
SPM Output drive current
ACT Output drive current
Min.
4.5
4.5
4.5
Limits
Typ.
5.0
12.0
12.0
Max.
5.5
13.2
13.2
700
700
Unit
V
V
V
mA
mA
Rating
15
15
7.0
15
1.2
0.7
4.5
0–VCC1
0–VCC2
1.2
9.6
150
-20–+75
-40–+125
Unit
V
V
V
V
A
A
V
V
V
W
mW/˚C
˚C
˚C
˚C
MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
ELECTRICAL CHARACTERISTICS
(VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25˚C unless otherwise noted.)
Symbol
Parameter
Conditions
Isleep
Sleep Mode Supply current
VCC1 & VCC2 pin total Current
(at S/S pin, MUTE pin low or open)
Icc
Supply current
VCC1 & VCC2 pin total Current
(EC=ECR=1.65V) [S/S pin, MUTE pin High]
Vsat
ECdeadECdead+
ECR
EC
Gio
Vlim
Saturation voltage
Control voltage dead zone
Reference voltage Input range
Control voltage Input range
Control gain
Control limit
Top and Bottom saturation voltage.(Load current:500mA)
EC<ECR
EC>ECR
1 pin(it is possible to input 0 to 5V)
2 pin(it is possible to input 0 to 5V)
Io=Gio/Rsense [A/V]
Ilim=Vlim/Rsense [A]
Min.
-60
0
0
0
0.34
0.27
Limits
Typ.
Max.
Unit
10
µA
19
28
mA
1.2
-30
+30
1.65
1.65
0.4
0.3
1.9
0
+60
3.3
3.3
0.46
0.33
V
V
V
V/V
V
VCC1-1.3
V
VH com
Hall sensor amp
common mode input range
16
– 21 pins
1.3
VHmin
Hall sensor amp.
input signal level
23
– 28 pins
60
120
VHb
IHb
Hall bias terminal output voltage Load current (IHb)=10mA.
Hall bias terminal sink current
0.6
0.85
Von
Motor start voltage
[S/S]pin input voltage when it starts up the motor.
*The IC is in the active condition.
*The hall bias is available.
Voff
Motor stop voltage
[S/S]pin input voltage when it stops the motor.
*The IC is in the sleep condition.
*The hall bias is off.
ViH1
BRS input high voltage
BRS input voltage that the short braking is selected
when the reverse torque.
3.6
ViM
BRS input middle voltage
BRS input voltage that the free run is selected when the
reverse torque.
1.6
ViL1
BRS input low voltage
BRS input voltage that the reverse braking is selected
when the reverse torque.
mV
mVp-p
1.2
30
V
mA
V
2.0
0.8
V
V
2.2
V
0.8
V
*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.
MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
ELECTRICAL CHARACTERISTICS
(VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25˚C unless otherwise noted.)
Symbol
Parameter
Conditions
Min.
Limits
Typ.
Max.
Unit
ViL2
Logic input
Low voltage
[FGS] input voltage when it is LOW.
0.8
V
VOL
[FG] pin
output low voltage
at Io current=1mA
0.5
V
ViH2
Logic input
high voltage
[FGS] input voltage when it is HIGH.
2.0
V
ELECTRICAL CHARACTERISTICS
(VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25˚C unless otherwise noted.)
Symbol
Vsat2
ACT Saturation voltage
Voff2
output offset voltage
Gain
Voltage Gain between input and output
VinIN
IN-,IN+ input voltage range
IN-,IN+ input current
IinIN
Vmute-on Mute-on voltage
Vmute-off Mute-off voltage
Imute
Conditions
Parameter
Mute terminal input current
Limits
Typ.
Max.
0.7
1.0
V
47
mV
8.8
V/V
0
8.0
V
0
3.0
V
-2
0
0.8
µA
V
V
250
µA
Min.
Top and Bottom saturation voltage.
Load current 0.5A (bootstrap)
IN(+)= IN(-)= 1.65V
-47
{OUT(+)–OUT(-)}
(IN(+) - IN(-))
VCC2 = 12 V
VCC2 = 5 V
VDD+ = 5 V
7.2
IN(+) = IN(-) = 1.65V
Mute-on
Mute-off
8.0
Unit
2.0
Mute terminal input current
(at 5V input voltage)
THERMAL CHARACTERISTICS
(VCC1=5V, VCC2=12V, VDD+=5V, VDD-=GND, Ta=25˚C unless otherwise noted.)
Symbol
Parameter
Function start temperature
of IC
Min.
TSD
Thermal Shut Down
Typ.
165
Max.
Function stop temperature
of IC
Min.
Typ.
125
Unit
Max.
˚C
MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
THE RELATIONSHIP WITH I/O CONTROL AND
THE BRAKING MODE
BRS=LOW
REVERSE BRAKING
Reverse Torque
Current limit
0.8A/V
0–+60mV
0
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.
EC - ECR
0–-60mV
0.8A/V
Current limit
Forward Torque
Figure 1.
BRS=Hi
SHORT BRAKING
Reverse Torque
0
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.
EC - ECR
0–-60mV
0.8A/V
Current limit
Forward Torque
Figure 2.
BRS=Open
FREE RUN
0
EC-ECR
0.8A/V
0–-60mV
Current limit
Forward Torque
Figure 3.
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.
MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
THERMAL DERATING
6.0
(W)
5.0
Power Dissipation (Pdp)
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.
4.1W
using H-type board
3.1W
using I-type board
4.0
2.9W
using J-type board
3.0
2.0
1.0
0
25
50
75
100
Ambient Temperature Ta (˚C)
125
150
MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
HALL AMPLIFIER INPUT AND COMMUTATION
The relationship between the hall amplifier inputs voltage and the
motor current outputs is shown in Figure 4.
Hw+
Hv+
Hu+
Hall elements
Hall
inputs
U
V
V
U
W
Outer loator
U
V
SOURSE
W
W
V
V
U
W
Output
current
U
W
REVERSE
EC>ECR
V
SINK
U
V
W
U
W
FORWARD
EC<ECR
Figure 4.
BRAKING MODE SELECT FUNCTION
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.
Braking mode select [BRS] pin
HIGH
SHORT BRAKE
OPEN
FREE RUN
LOW
REVERSE BRAKE
Figure 5.
FG FUNCTION
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 pulse select (FGSpin)
LOW or OPEN
HIGH
NX1 pulse
NX3 pulse
Figure 6.
SLEEP MODE FUNCTION and MUTE FUNCTION
S/S
MUTE
HS/S H
H
L,OPEN
L,OPEN
H
L,OPEN L,OPEN
Figure 7.
Spindle
Hall bias
M UON
TE
ON
OFF
OFF
Actuator
BIAS
TSD
CIRCUIT CIRCUIT CIRCUIT
ON
OFF
ON
OFF
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.
MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
I/O CHARACTERISTICS of ACTUATOR DRIVE PART
<INPUT>
20K
+
IN+
Vrefm
Vrefm Amp.
20K
1.65V
6K
+
6K
6K
IN-
0.2V
24K
VDD+
VM+
<OUTPUT>
VM+
24K
24K
VM-
0.8V
1.65V
Vrefm
+
6K
IN+
VM-
0.8V
VDD-
24K
Vrefm= [(VDD+)+(VDD-)] / 2
Input Buffer
Gain=x8
Reference 1.65V
VCC2
CH1 power amplifier output terminal equivalent circuit
VDD+
(OUT+
OUT-)
GND
VDD-
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.
MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
I/O terminal Equivalent circuit
(2)IN+, IN-, EC, ECR input terminal equivalent circuit
(1) Hall input amplifier
I/O terminal equivalent circuit
VCC1
(Hu+, Hu-, Hv+, Hv-, Hw+, Hw-)
VCC2
VCC2
VCC1
2K
2K
2K
GND
GND
GND
GND
GND
GND
(EC,ECR)
(3)FG output terminal equivalent circuit
(IN+, IN-)
(4)HB output terminal equivalent circuit
VCC1
VCC1
10K
(HB)
(FG)
GND
(6)S/S, MUTE,FGS input terminal equivalent circuit
(5)BRS input terminal equivalent circuit
VCC1
(FGS)
(S/S, MUTE)
GND
GND
2K
2K
VCC1
VCC1
10K
24K
24K
10K
3K
10K
10K
GND
VCC1
18K
18K
2K
GND
GND
GND
(BRS)
(7)Spindle driver output stage equivalent circuit
VCC2
RS
U
V
W
GND
MITSUBISHI <CONTROL / DRIVER IC>
M56786FP
SPINDLE MOTOR AND 1CH ACTUATOR DRIVER
APPLICATION CIRCUIT
EC, ECR, IN-, IN+ input application
CTL
These are the application circuits of input for the EC,ECR,
IN- and IN+.
REF
CTL
PWM1
PWM1
REF
PWM2
PWM2
ECR
IN-
42
2
EC
IN+
41
3
S/S
MUTE
40
4
BRS
OUT-
39
5
FGS
VDD+
38
6
FG
VDD-
37
7
VCC1
OUT+
36
M
1
35
9
34
10uF
10
11
GND
12
*Rh b
Hw
Hv
M56786FP
5V
8
33
GND
104
31
30
14
29
15
HB
U
28
16
Hu+
V
27
17
Hu-
W
26
18
Hv+
TP
25
19
Hv-
CI
24
20
Hw+
RS
23
21
Hw-
VCC2
22
*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.
104
32
13
Hu
TO 5V OR 12V
POWER SUPPLY
*note
104
0.5
12V
10uF
The 25 pin (TP) is test terminal !
Please make an open this terminal !
104