MITSUBISHI <CONTROL / DRIVER IC>
M56781FP
2-CHANNEL ACTUATOR MOTOR DRIVER
DESCRIPTION
PIN CONFIGURATION (TOP VIEW)
The M56781FP is a semiconductor IC developed as the motor
driver used DVD, DVD-ROM, CD-ROM and CD Player.
This device include 2 channel BTL drivers and can drive 2
actuators with one IC at the same time.
Also, the mute circuit, thermal protection circuit and VREF voltage
monitor circuit functions are included.
1
24 GND
2
23 VM2-
MUTE2B
3
22 CTL2OUT
MUTE2A
4
21 CTL2+
MUTE1
5
20 CTL2-
VCC2
6
VCC1
7
APPLICATION
IN-
8
17 CTL1-
DVD, DVD-ROM, CD-ROM, CD-PLAYER
IN+
9
16 CTL1+
FEATURES
● Low output saturation voltage (typ. 1.35V at 0.5A).
● Wide operating supply voltage range (4.5 – 15V).
● High current drive capability (maximum 0.9A).
● Low crossover distortion.
● High frequency capability.
M56781FP
GND
VM2+
19 VREF
18 TSDS
OPOUT 10
15 CTL1OUT
VM1+ 11
14 VM1-
GND 12
13 GND
Outline 24P2Q-A
BLOCK DIAGRAM
OPOUT IN+
10
9
IN-
CTL1+ CTL1- CTL1OUT
8
17
16
VM1+
15
VM1-
MUTE1
14
5
11
CH1
25k
+
- VCC2
A3
+
25k
25k
25k
PA
PA
-
+
+
VCC1
2
A1
H
: Mute On
L, Open : Mute Off
VCC1
CH1
MUTE
VCC1
×5
×5
5k
5k
7
5k
5k
Vrefm
VCC2
GND
1, 12, 13, 24
+
-
TSD
1.4V
Vrefm
5k
5k
5k
×5
-
-
25k
+
PA
-
VCC2
2
25k
25k
+
VREF
21
20
22
CTL2+ CTL2- CTL2OUT
2
VM2+
6
PA
H, H
Mute On
25k
CH2
19
VCC2
×5
A2
+
CH2
MUTE
5k
VCC2
23
VM2-
4
3
18
MUTE2A MUTE2B TSDS
MITSUBISHI <CONTROL / DRIVER IC>
M56781FP
2-CHANNEL ACTUATOR MOTOR DRIVER
PIN DESCRIPTIONS
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
Symbol
Function
Pin No.
GND
CH2 Amp. non-inverted output
CH2 mute B
CH2 mute A
CH1 mute
Power supply 2
Power supply 1
Op-Amp. inverted input
Op-Amp. non-inverted input
Op-Amp. output
CH1 Amp. non-inverted output
GND
GND
VM2+
MUTE2B
MUTE2A
MUTE1
VCC2
VCC1
ININ+
OPOUT
VM1+
GND
Symbol
GND
VM1CTL1OUT
CTL1+
CTL1TSDS
VREF
CTL2CTL2+
CTL2OUT
VM2GND
13
14
15
16
17
18
19
20
21
22
23
24
Function
GND
CH1 Amp. inverted output
CH1 input Amp. output
CH1 Amp. non-inverted input
CH1 Amp. inverted input
Thermal monitor
Reference voltage input
CH2 Amp. inverted input
CH2 Amp. non-inverted input
CH2 input Amp. output
CH2 Amp. inverted output
GND
ABSOLUTE MAXIMUM RATING (Ta = 25°C)
Symbol
VCC
Io
Vin
Pd
Kθ
Tj
Topr
Tstg
Parameter
Power supply
Output Current
Maximum input voltage
of each terminals
Power dissipation
Thermal derating
Junction temperature
Operating temperature
Storage temperature
Conditions
6 , 7 pins
VCC = VBS = 12V
33
,
4
,
5
,
8
,
9
,
16
With infinite heatsink
With infinite heatsink
,
17
,
19
,
20
,
21
pin
Rating
Units
15
900
V
mA
0 – VCC
V
2.97
42.1
150
-20 – +75
-40 – +150
W
°C/W
°C
°C
°C
MITSUBISHI <CONTROL / DRIVER IC>
M56781FP
2-CHANNEL ACTUATOR MOTOR DRIVER
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC1, 2
Parameter
Min.
Power supply
Limits
Typ.
12
Max.
Units
V
ELECTRICAL CHARACTERISTICS (Ta = 25°C, VCC1 = VCC2 = VBS2 = 12V, Load = 0 unless otherwise noted.)
Symbol
Parameter
Measurement condition
Min.
Limits
Typ.
Max.
—
1.0
2.0
mA
Units
ICC1
Power supply current - 1
(at Enable condition)
6
ICC2
Power supply current - 2
(at Mute condition)
6 , 7 pins current
at VREF = VCTL = 2.5V, MUTE = 5V.
—
4.5
7.0
mA
ICC3
Power supply current - 3
6 , 7 pins current
at VREF = VCTL = 2.5V, MUTE = 0V.
—
23
37
mA
VSAT
Output saturation voltage
Top and Bottom power Transistors
saturation voltage (at IO = 0.5A).
—
1.35
1.9
V
VOFS1
Output Amp. Offset voltage 1
VREF = VCTL = 2.5V, VCC = VBS = 5V
(CTL Amp. = buffer.)
-27
—
+27
mV
VOFS2
Output Amp. Offset voltage 2
VREF = VCTL = 2.5V, VCC = VBS = 12V
(CTL Amp. = buffer.)
-78
—
+78
mV
GAIN
Voltage Gain between
input and output
{VM(+) – VM(-)}
(VCTL – VREF)
(CTL Amp. = buffer.)
19.1
20
20.8
dB
VMUTEON
Mute ON voltage
CH2 is Mute-ON mode when
MUTE2A = H and MUTE2B = H condition.
2.0
—
—
V
VMUTEOFF
Mute OFF voltage
—
—
0.8
V
IMUTE
Mute input current
—
190
250
µA
,
7
pins current at VREF = 0.
MUTE1 = MUTE2A = MUTE2B = 5V
MITSUBISHI <CONTROL / DRIVER IC>
M56781FP
2-CHANNEL ACTUATOR MOTOR DRIVER
ELECTRICAL CHARACTERISTICS (Ta = 25°C, VCC1 = VCC2 = VBS1 = VBS2 = 12V, Load = 0)
Symbol
Parameter
Test conditions
Min.
Limits
Typ.
Max.
1.5
—
VCC-1.2
V
1.0
—
VCC-1.0
V
0
—
VCC-1.9
V
Units
VCTLIN
CTL Amp. Input voltage range
A1 and A2 Amps.
VCTLIN
CTL Amp. Output voltage range
A1 and A2 Amps.
VA3IN
A3 Amp. Input voltage range
VA3OUT
A3 Amp. Output voltage range
Load = 0
1.0
—
VCC-1.0
V
VA3OFS
A3 Amp. Offset voltage
Load = 0
-5
—
+5
mV
VREFS
VREF monitor voltage
When VREF voltage is under this values,
M56781FP makes the Bias shut off.
—
1.4
1.8
V
VREF1
VREF input current
VREF = 2.5V
1.25V ≤ VCTL ≤ 3.75V
-1
-0.37
0.1
mA
Load = 0
CH1 AND CH2 INPUT AND OUTPUT CHARACTERISTICS
Input
Non-inverted Amp.
(Gain = 5.0 times)
VREF
CTL+
+
-
R
CTL-
INPUT
Reference
Voltage
VREFM
= 5.65V
+
-
VM+
+
-
VM-
0.5V
VREF
(2.5V)
VM1-
VM1+
R
Inverted Amp.
(Gain = 5.0 times)
2.5V
VREFM
CTLOUT
2.5V
THERMAL DRATING CURVE
(W)
With infinite heatsink
5.0
Power dissipation (Pd)
4.5
4.0
Without heatsink
3.0
2.0
1.2
1.0
0
0
25
50
75
100
Ambient temperature (Ta)
125
150
(°C)
MITSUBISHI <CONTROL / DRIVER IC>
M56781FP
2-CHANNEL ACTUATOR MOTOR DRIVER
TYPICAL CHARACTERISTICS
Output Saturation Voltage - Load Current Characteristics.
VCC1 = VCC2 = 12V
(V)
12
Top side
saturation voltage
11
0.84
0.89
0.95
Output Voltage
1.00
1.05
The voltage range
that is able to drive a motor.
2
1
0.06
0.12
0.18
200
300
0.30
0.24
Bottom side saturation voltage
0
0
100
400
500
(mA)
FREQUENCY CHARACTERISTICS
(dB)
(deg)
180
40
GAIN
PHASE
90
20
GAIN
0
0
PHASE
-90
-20
-180
-40
0.03
0.06
0.1
0.3
0.6
1
3
6
10
30
60
100
300
600
(kHz)
FREQUENCY
Reverse
H
H
CTL2+
CTL2-
MUTE2B
CTL2out
MUTE2A
MUTE1
VREF
CTL1+
CTL1-
Shut off
Forward
Input (+)
Stop (SB)
L
Tray
offset revise
resistance
L
Tray
Input (+)
Input (-)
VREF
Input
A1
VCC1
R
R
R
R
R
R
R
R
VCC2
5R
PA
5R
5R
5R
5R
PA
IN-
5R
5R
PA
VM2-
CTL2+
offset revise
resistance
CTL2out
MUTE2B
MUTE2A
MUTE1
VREF
5R
VREF
Input
Traverse
offset revise
resistance
CTL1+
CTL1-
CTL1OUT
CTL2-
M
VREF
VREF
Input
Tracking
PA
VM2+
OPout
A3
IN+
VM1-
VM1+
12V
If MUTE2A and MUTE2B are connected to Input(+) and Input(-),
this device can be shut off the output when Input(-) and Input(+)
are High condition.
Vrefm2
= 5.65V
A2
CH2
MUTE
Vrefm1
= 5.65V
-
CTL1OUT
.
Input (-)
+
-
+
+
+
+
+
+
-
-
A1
VCC1
A2
Vrefm2
= 5.65V
CH2
MUTE
Vrefm1
= 5.65V
+
+
R
R
R
R
R
R
R
R
VCC2
5R
PA
+
5R
5R
5R
5R
PA
+
PA
+
5R
5R
5R
PA
+
-
IN-
IN+
VM2-
VM2+
OPout
A3
VM1-
VM1+
-
+
-
Focus
M
DSP
12V
MITSUBISHI <CONTROL / DRIVER IC>
M56781FP
2-CHANNEL ACTUATOR MOTOR DRIVER
APPLICATION CIRCUIT This show the 4 actuators drive circuit using two M56781FP.