MITSUBISHI <CONTROL / DRIVER IC>
M56781FP
2-CHANNEL ACTUATOR MOTOR DRIVER
DESCRIPTION
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 V
REF
voltage
monitor circuit functions are included.
PIN CONFIGURATION (TOP VIEW)
GND
VM2+
MUTE2B
MUTE2A
MUTE1
V
CC
2
V
CC
1
IN-
IN+
1
2
3
4
5
6
7
8
9
24 GND
23 VM2-
22 CTL2
OUT
21 CTL2+
20 CTL2-
19 V
REF
18 TSDS
17 CTL1-
16 CTL1+
15 CTL1
OUT
14 VM1-
13 GND
FEATURES
q
Low output saturation voltage (typ. 1.35V at 0.5A).
q
Wide operating supply voltage range (4.5 – 15V).
q
High current drive capability (maximum 0.9A).
q
Low crossover distortion.
q
High frequency capability.
M56781FP
APPLICATION
DVD, DVD-ROM, CD-ROM, CD-PLAYER
OP
OUT
10
VM1+ 11
GND 12
Outline 24P2Q-A
BLOCK DIAGRAM
OP
OUT
IN+
10
9
IN-
8
CTL1+ CTL1- CTL1
OUT
16
17
15
VM1+
11
CH1
+
- V
CC
2
A3
+
A1
5k
-
×5
5k
5k
×5
5k
25k
-
PA
+
25k
25k
-
25k
PA
+
V
CC
1
2
CH1
MUTE
VM1-
14
V
CC
1
MUTE1
5
H
: Mute On
L, Open : Mute Off
V
CC
1
7
Vrefm
GND
1, 12, 13, 24
19
V
REF
+
-
1.4V
Vrefm
V
CC
2
TSD
5k
×5
A2
+
-
-
25k
PA
+
5k
5k
×5
-
+
PA
5k
CH2
MUTE
V
CC
2
6
V
CC
2
2
25k
V
CC
2
H, H
Mute On
25k
CH2
25k
21
20
22
2
VM2+
23
VM2-
4
3
18
CTL2+ CTL2- CTL2
OUT
MUTE2A MUTE2B TSDS
MITSUBISHI [ MITSUBISHI ELECTRIC SEMICONDUCTOR ]
