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
●Provided with digital servo enabling high precision, high stability
and non-adjustment.
●3-speed switching function with a pin .................................. MOD
● Enable two systems .......................................................... EN•EN
● IO (peak)=1.0A
● Low 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
36
35
34
33
325
316
30
M56733AFP
29
289
27
2611
2512
24
23
21
20
ERROUT
19
FG
FGIN
FGMon
GND
OSCIN
OSC
DSC
1
CC
V
2
HB
–
3
IN
+
4
i
EN
7
8
10
13
EN
14
15 22
OUT
16
MOD
17
FLT
18
OUT
Outline 36P2R-D
U
V
W
+
H
U
–
HU
RF
GND
+
V
H
–
HV
+
HW
–
HW
ERRIN
–
BLOCK DIAGRAM
U
36
31RF
1VCC
33
32
+
–
U
U
H
H
LOGIC
24
+
V
H
V
35
23
H
W
34
CTL
EN
CONTROL
22
–
V
21 3
+
–
W
HW
H
Hall
Bias
2
VREF
FLT
17
EN
6
OVSD
TSD
13
EN
ERR
VREF
FG
20
ERR
FG
–
OUT
FG
4
+
IN(–)
ERR
19
5
FG
(Monitor)
OUT
DSC
18
DISCRIMINATOR
1 / N
OSC
14
15
IN
OSC
OUT
OSC
7
––
12
GND
25
30
MOD
16
3-PHASE BRUSHLESS MOTOR CONTROL
ABSOLUTE MAXIMUM RATINGS (Ta=25˚C)
Symbol Ratings UnitParameter Conditions
MITSUBISHI <CONTROL / DRIVER IC>
M56733AFP
VCC
Io
VHD
VIN
fIN
Pt
Kθ
Tj
Topr
Tstg
Supply voltage
Output current
Hole amplifier, differential input voltage
Apply voltage at pin
Clock frequency
Power dissipation
Thermal derating
Temperature at junction
Operating temperature
Storage temperature
TYPICAL CHARACTERISTICS
Thermal derating (Maximum rating)
5.0
4.5
4.0
3.0
2.0
With infinite heat
sink used
Free air
Between 21 and 22, between 23 and 24,
between 32 and 33 (pin number)
6,13,21 – 24,32,33 (pin number)
Use of infinite heat sink
Use of infinite heat sink
15
1.0
5
CC
0 – V
1000
4.5
27.8
150
-20 – 75
-40 – 125
V
A
V
V
kHz
W
°C/W
°C
°C
°C
Power dissipation Pdp (W)
1.0
0
50 125
25 150
Ambient temperature T
75
1000
a (°C)
MITSUBISHI <CONTROL / DRIVER IC>
3-PHASE BRUSHLESS MOTOR CONTROL
ELECTRICAL CHARACTERISTICS (Ta=25˚C, VCC=12V unless otherwise noted)
Symbol Test conditions UnitParameter
I
CCH
ICCL
I
INHA
VN
∆V
Vsat
VTH
GV
∆GV
Vref
IIN•E
Vo•E
VCL
VIN
IIN
Vinj
VODSC
T
∆
fosc
I
injMAX
injMIN
I
VOLFG
I1FG
IINMOD
Circuit current
Circuit current
Hole amplifier input current
Phase output center voltage
Center voltage difference between phases
N
Output saturation voltage
Control input reference voltage
Voltage gain between control input and
output
Difference in voltage gain between phases
Error amplifier reference voltage
Error amplifier input current
Error amplifier output level
Current limit reference voltage
Function input threshold voltage
Input current at function input pin
Voltage at injector pin
Discriminator output level
Discriminator count error
Oscillation frequency
Maximum operating current of injector
Minimum operating current of injector
FG amplifier output low level (monitor)
Leak current at FG amplifier output pin
(monitor)
Input current at MOD pin
Except for injector current with circuit turned ON
With circuit turned OFF
I
O=0.7A, sum of upper and lower voltage
Voltage at FLT pin when output starts
Source side
Sink side
Source + Sink
Measurement of mean level of discriminator
output
Hi
Lo
Voltage at RF pin when the voltage at FLT pin
is lower than 1.5V.
H
i
6,13pin
Lo
V
IN=12V 6pin
V
IN=0V 13pin
I
inj=6mA
i
H
Lo
+ for deceleration side, - for acceleration side
fosc=492kHz
fosc=492kHz
fosc=492kHz
fosc=492kHz
IL=200µA
12V applied
12V applied
0V applied
M56733AFP
Limits
Min. Type. Max.
189
16.65
28 mA
300––
4.00.4–
7.16.35.1
0.2––
3.22.8–
1.351.201.05
25.1018.05
26.8123.8020.82
30.0028.0026.00
2.42.22.0
3.12.52.2
1.050.80.6
0.440.400.36
1.0––
1000700500
-70-100-150
1.50.90.6
5.34.84.1
1.20.80.5
0.2–-0.2
0.20.1–
1.0––
800565435
-140-98-75
µA
µA
V
V
V
V
dB
dB
2––
V
µA
–-0.02-0.2
V
V
––2.5
V
µA
V
V
µs
61-6
%
mA
––25
mA
4––
V
µA
µA
APPLICATION CIRCUIT EXAMPLE
FG sync hron ous freque nc y
MITSUBISHI <CONTROL / DRIVER IC>
M56733AFP
3-PHASE BRUSHLESS MOTOR CONTROL
VCC
C11
R8
C12
R9
C13
R10
C1 C2
R7
R5
U V W
R4
C10
R6
36235334433532631730829928102711261225132414231522162117201819
M56733AFP
M56733AFP
1
R2
C3
R1
X1
C8
C6
FG
C5
C7
C4
FG
Moni
EN
EN
MOD
R3
C9
Notes:
1. Sets items with when measures for such as oscillation require to be taken.
2. R1 is to be used for injection current boost. Set R1, if necessary.
2 when gain adjustments are required.
3. Set R
X1=492kHz
(Oscillator)
4. Enable function
EN
EN
Lo
Hi
DISABLE
DISABLE
5. Mode function
Mode pin
Lo (MOD ≤ 0.8V)
M (Open status)
Hi (MOD ≥ 2.6V)
<Constants>
R
1=5.1kΩ
2=510Ω
R
3=47kΩ
R
4=180kΩ
R
5=1.2kΩ
R
6=0.5Ω
R
7=1.2kΩ
R
8=4.7Ω
R
9=4.7Ω
R
10=4.7Ω
R
L
O Hi
ENABLE
DISABLE
fosc/1640Hz
fosc/820Hz
fosc/(4100/3) Hz
1=33µF
C
2=0.47µF
C
3=10µF
C
4=0.01µF
C
5=165pF
C
6=56pF
C
7=165pF
C
8=1µF
C
9=0.01µF
C
10=0.1µF
C
11=0.1µF
C
12=0.1µF
C
13=0.1µF
C
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