M56755FP Datasheet, PDF (1/9 Pages) Mitsubishi Electric Semiconductor – SPINDLE MOTOR DRIVER

MITSUBISHI <CONTROL / DRIVER IC>
M56755FP
SPINDLE MOTOR DRIVER
DESCRIPTION
The M56755FP is a semiconductor integrated circuit designed for a
single chip controller for CD-ROM spindle motor.
M56755FP has a both (forward and reverse) motor torque control
by the motor speed control terminal.
M56755FP has the several braking mode that an user can flexibly
select in order to generate the reverse torque. Also, this device
includes a bias circuit for Hall Sensor, a current limit circuit and a
thermal shut down function.
FEATURES
qThe supply voltage with wide range.
(4.5V to 13.2V)
qHigh motor drive current (1.2A)
qMotor current control for the both motor torque is possible.
qReverse torque mode select (SHORT BRAKING, etc)
qSleep mode
qHall amplifier sensitivity select
qAutomatic stop select (with reverse detected signal pin)
APPLICATION
CD-ROM, DVD, DVD-ROM etc.
PIN CONFIGURATION (TOP VIEW)
S/S 1
RDS 2
FG 3
CI 4
MODE2 5
MODE1 6
7
8
9
GND
10
11
12
VM 13
VCC2 ₁₄
EC 15
ECR 16
VCC1 17
HB 18
36 W
35 V
34 U
33 RS
32 MODE3
31 MODE4
30
29
28
GND
27
26
25
24 Hw-
23 Hw+
22 Hv-
21 Hv+
20 Hu-
19 Hu+
Outline 36P2R-D
BLOCK DIAGRAM
U
V
W
S/S
34
35
36
1
RS
VCC1
33
17
VM 13
VCC2 14
MODE1 6
MODE2 5
MODE4 31
MODE3 32
FG 3
RDS 2
BRAKING
MODE
CHANGE
SENSE
120˚
MATRIX
I/I
converter
TSD
FG
RDS
+-
+-
+-
Hall bias
19 20 21 22 23 24
18
4
Hu+ Hu- Hv+ Hv- Hw+ Hw- HB
CI
7
8
Vref
9
GND
10
11
12
V/I converter
15
16
EC
ECR
25
26
27
GND
28
29
30