M56785FP Datasheet, PDF (1/11 Pages) Mitsubishi Electric Semiconductor – SPINDLE MOTOR DRIVER

MITSUBISHI <CONTROL / DRIVER IC>
M56785FP
SPINDLE MOTOR DRIVER
DESCRIPTION
The M56785FP is a semiconductor integrated circuit in order to
drive the spindle motor.
FEATURES
q Large power dissipation (Power Package).
q 3.3V DSP available.
q The supply voltage with wide range.
q High motor drive current .
q Low saturation voltage. (typical 1.2V at load current 500mA)
q Motor current control for both motor torque directions.
q Reverse torque mode select [SHORT BRAKING,etc].
q Sleep mode. (Zero total current )
q Hall amplifier sensitivity select.
(Minimum voltage : 35mVp-p or 50mVp-p)
q FG signal output terminal.
q Automatic stop select. (Removable function)
q Reverse detected signal pin.
APPLICATION
CD-ROM,DVD,DVD-ROM,DVD-RAM etc.
PIN CONFIGURATION (TOP VIEW)
N.C ₁
S/S 2
RDS 3
FG 4
CI 5
MODE2 6
MODE1 7
8
9
10
GND ¹¹
12
13
14
VM ¹⁵
VCC2 16
EC 17
ECR 18
VCC1 19
HB 20
N.C 21
42 ^N.C
41 W
40 ^V
39 U
38 ^RS
37 ^MODE3
36 ^MODE4
35
34
33
32 _GND
31
30
29
28 Hw-
27 Hw+
26 Hv-
25 Hv+
24 Hu-
23 ^Hu+
22 ^N.C
Outline 42P9R-A
N.C: no connection
BLOCK DIAGRAM
U
V
W
S/S
39
40
41
2
RS
VCC1
38
19
VM 15
VCC2 16
MODE1 7
MODE2 6
BRAKING
MODE
CHANGE
120°
MATRIX
I/I
Converter
MODE4 36
SENSE
MODE3 37
FG 4
RDS 3
FG
RDS
TSD
+-
+-
+-
Hall
Bias
23 24
25 26
27 28
20
5
Hu+ Hu-
Hv+ Hv- Hw+ Hw-
HB
CI
Vref
V/I Converter
17
18
EC
ECR
GND
GND