M56745FP Datasheet, PDF (1/5 Pages) Mitsubishi Electric Semiconductor – SPINDLE MOTOR DRIVER

MITSUBISHI <CONTROL / DRIVER IC>
M56745FP
SPINDLE MOTOR DRIVER
DESCRIPTION
The M56745FP is a semiconductor integrated circuit designed for a
single chip controller for CD-ROM spindle motor.
M56745FP has a both (forward and reverse) motor rotation control
by the motor speed control terminal.
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 (1.0A).
qMotor current control for the both motor rotation is possible.
APPLICATION
CD-ROM
PIN CONFIGURATION (TOP VIEW)
S/S ₁
2
3
N.C
4
5
6
7
8
9
GND
10
11
12
VM ₁₃
CI 14
EC 15
ECR 16
Vcc ₁₇
Hb 18
36 W
35 V
34 U
33 Rs
32 Rnf
31 M.GND
30
29
28
GND
27
26
25
24 Hw-
23 Hw+
22 Hv-
21 Hv+
20 Hu-
19 Hu+
Outline 36P2R-D
N.C: No connection
BLOCK DIAGRAM
U
V
W
34
35
36
VM 13
S/S
Rs
Rnf
M.Gnd
Vcc
1
33
32
31
17
Vref
120˚
MATRIX
I/I
converter
TSD
+-
+-
Hall
+-
Bias
19 20
21 22
23 24 18
14
Hu+ Hu- Hv+ Hv- Hw+ Hw- Hb
CI
V/I converter
15
16
EC
ECR