M56733AFP Datasheet, PDF (1/4 Pages) Mitsubishi Electric Semiconductor – 3-PHASE BRUSHLESS MOTOR CONTROL

MITSUBISHI <CONTROL / DRIVER IC>
M56733AFP
3-PHASE BRUSHLESS MOTOR CONTROL
DESCRIPTION
The M56733AFP is a semiconductor integrated circuit designed as
a single chip controller for the FDD spindle motor. The IC is
equipped with a power amplifier, hole amplifier, FG amplifier,
oscillator, speed discriminator, and various types of protection
circuits.
Equipped with MOD pin that enables 3-speed switching with a
single pin, the M56733AFP is very convenient to make system
compact.
FEATURES
qProvided with digital servo enabling high precision, high stability
and non-adjustment.
q3-speed switching function with a pin .................................. MOD
q Enable two systems .......................................................... EN•EN
qIO (peak)=1.0A
qLow capacitance of dumping capacitor
APPLICATION
FDD spindle motor (5")
RECOMMENDED OPERATING CONDITIONS
Supply voltage ................................................. 10.8 – 12.0 – 13.2 V
Oscillation frequency .......................................................... 492 kHz
Maximum output current ..................................................... 800 mA
FG amplifier input signal level .............................. 5 mVp-p or more
PIN CONFIGURATION (TOP VIEW)
VCC 1
HB 2
FGIN– 3
FGIN+ 4
FGMoni 5
EN 6
7
8
9
GND
10
11
12
EN 13
OSCIN 14
OSCOUT 15
MOD 16
FLT 17
DSCOUT 18
36 U
35 V
34 W
33 HU+
32 HU–
31 RF
30
29
28
GND
27
26
25
24 HV+
23 HV–
22 HW+
21 HW–
20 ERROUT
19 _ERRIN–
Outline 36P2R-D
BLOCK DIAGRAM
U
V
W
36
35
34
RF 31
VCC 1
LOGIC
FLT
17
VREF
OVSD
CTL
TSD
ERROUT
20
ERR
VREF
ERRIN(–)
19
DSCOUT
18
7
12
25
DISCRIMINATOR
GND
30
1/N
16 MOD
EN
OSC
CONTROL
FG
33 32 24 23 22 21
HU⁺ HU^– HV⁺ HV^– HW⁺ HW^–
2
Hall
Bias
6
13
EN EN
34
FG– FG+
5
FG
(Monitor)
14 15
OSCIN OSCOUT