M56755AFP Datasheet, PDF (1/10 Pages) Mitsubishi Electric Semiconductor – SPINDLE MOTOR DRIVER

MITSUBISHI <CONTROL / DRIVER IC>
M56755AFP
SPINDLE MOTOR DRIVER
DESCRIPTION
The M56755AFP is a semiconductor integrated circuit designed for
a single chip controller for CD-ROM spindle motor.
M56755AFP has a both (forward and reverse) motor torque control
by the motor speed control terminal.
M56755AFP 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
q 3.3V DSP available.
q The supply voltage with wide range.
(4.5V to 13.2V)
q High motor drive current (1.2A).
q Motor current control for the both motor torque is possible.
q Reverse torque mode select [SHORT BRAKING, etc]
q Sleep mode
q Hall amplifier sensitivity select
q Automatic stop select (with reverse detected signal pin)
APPLICATION
Above 8 times speed 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
33
VCC1
17
VM 13
VCC2 14
MODE1 6
MODE2 ₅
BRAKING
MODE
CHANGE
120°
MATRIX
I/I
Converter
MODE4 31 ^SENSE
MODE3 32
FG 3
RDS 2
FG
RDS
TSD
+-
+-
+-
Hall
Bias
19 20 21 22 23 24
18
Hu+ Hu- Hv+ Hv- Hw+ Hw- HB
4
CI
Vref
V/I Converter
15
16
EC
ECR
GND
GND