Mitsubishi M51971FP, M51971L Datasheet
MITSUBISHI <CONTROL / DRIVER IC>
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M51971L/FP
MOTOR SPEED CONTROL
DESCRIPTION
The M51971 is a semiconductor integrated circuit designed to
control the motor rotating speed.
The built-in FG amplifier with high gain enables to use a wide
range of rotating speed detector (FG detector).
Use of less external parts enables DC motors to be controlled with
high precision.
FEATURES
●Wide range of supply voltage • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 4 – 17.5V
● V ariation coefficient of supply voltage •••••±0.005%/V (standard)
●Load variation coefficient•••••±0.01% (standard, full load range)
●Temperature coefficient of rotating speed • • • • 7ppm/˚C (standard)
●Built-in high performance FG amplifier
APPLICATION
Motor rotating speed control i n floppy disk driver, player, tape
recorder, car stereo, etc.
RECOMMENDED OPERATING CONDITIONS
Supply voltage range ••••••••••••••••••••••••••••••••••••4–17.5V
Rated supply voltage ••••••••••••••••••••••••••••••••••••••••••••9V
Input voltage range at pin ••••••••••••••••• -0.4 – Vcc Note 1
Input voltage range at pin •••••••••••••••••••••••••• -0.4 – Vcc
Highest setup tacho-generator frequency •••••••••••••••• 2.5kHz
Minimum trigger pulse width (input pulse at pin )
Note 1: The linear operation range is -0.4 to +0.4V.
Note 2: This condition applies to both periods: from pulse rising to
pulse falling and pulse falling to pulse rising.
1
4
4
• • • • • • • • • • 40µs Note 2
PIN CONFIGURATION(TOP VIEW
GND
Output
1
2
3
4
5
6
7
8
9
10
Outline 10P5
M51971FP
M51971L
Power supply
10
Output
9
Integration capacitance
8
GND
7
Stabilized voltage
65
Non-inverted input
Amplifier output
Stabilized voltage
Integration capacitance
Non-inverted input
Inverted input
Amplifier outpu
Schmitt input
Time constant
Inverted input
Schmitt input
Time constant
Power supply
1
2
3
4
BLOCK DIAGRAM
Non-inverted input
Inverted input
Power suppl
Outline 10P2-C
Amplifier
output
Operational
amplifier
V
LS
1
1.9V
2
10
Stabilized supply
voltage
Schmitt
intput
3
4
Schmitt
comparator
VLS 1.9V
Time constant
5
Timer
Over-shoot
prevention
circuit
Constant
current
control
Integration
capacitance
8
Buffer
amplifier
9
Output
GND
Stabilized
voltage
ABSOLUTE MAXIMUM RATINGS(Ta=25°C unless otherwise noted
)
)
MITSUBISHI <CONTROL / DRIVER IC>
M51971L/FP
MOTOR SPEED CONTROL
Symbol
Vcc
V
1
I
3
I 6
V4
I
9
Pd
F
K
θF
Topr
Tstg
Supply voltage
Apply voltage at pin
Source current at pin
Source current at pin
Apply voltage at pin
Source current at pin
Power dissipation
Thermal derating
Operating temperature
Storage temperature
Parameter Conditions
1
3
6
4
9
Ta≥25˚C
ELECTRICAL CHARACTERISTICS(Ta=25°C, Vcc=9V unless otherwise noted
Symbol Test conditions UnitParameter
CC Supply voltage range
V
I
CC
VS
I
1
I 2
1
V LS
AV
4
I
4
V TH
4
V HY
5
V S
Tτ
8
I C
rCD
9
R
9
V max
9
V min
V
BO
Circuit current
Stabilized supply voltage
Input current at pin
Input current at pin
Level shift voltage at pin
1
2
1
FG amplifier voltage gain
Input current at pin
4
Threshold voltage at pin 4
Hysteresis width at pin
Saturation voltage at pin
4
5
One-shot pulse width
Charging current at pin
8
Ratio of charging to discharging current at pin
Output protection resistance at pin
Maximum voltage at pin
Minimum voltage at pin
9
9
9
Buffer amplifier offset voltage
Voltage at pin
1
V = 0V
1
V = 0V
1
V = 0V
1
V =0.2mVrms,f=500Hz,
4
V = 2.5V
Useslevel shift voltageatpin as thereference.
6
External set gain=60dB
1
Rτ = 75kΩ
Rτ= 75kΩ, Cτ = 4700pF
8
V = 1V
8
8
V = 1V
9
I = -20mA
8 8 9
V = 1V, V - V
Ratings
18
-3
– Vcc
-5
-5
0 – Vcc
-20
880 (M51971L)
450 (M51971FP)
8.8 (M51971L)
4.5 (M51971FP)
-20 – +75
-40 – +125
Limits
Min. Typ. Max.
3.2
-30
59
0.4
16
37
3
395
100
3.2
50
100
17.5
6.0
2.98
2.27
64
2.0
40
55
20
415
-140
-9.0
150
200
200
4.0
2.44
-3.0
-180
1.51
54
0
20
375
-260
-14.5
65
2.9
0
2.71
-0.5
1.89
-190
-11.6
Unit
V
V
mA
mA
V
mA
mW
mW / °C
°C
°C
V
mA
V
µA
nA
V
dB
µA
mV
mV
mV
µsec
µA
–
Ω
V
mV
mV
TYPICAL CHARACTERISTICS
0
)
MITSUBISHI <CONTROL / DRIVER IC>
M51971L/FP
MOTOR SPEED CONTROL
Thermal Derating (Maximum Rating)
1000
M51971L
800
600
M51971FP
400
Power Dissipation Pd (mW)
200
0
25 50 75 100 125
Ambient temperature Ta (°C)
Rotating speed–Motor torque characteristics
3005
VCC=9V
Rotating speed–Supply voltage characteristics
3005
No load
3000
Rotating speed N (rpm)
2995
048121620
Supply voltage VCC (V)
Rotating speed–Ambient temperature
characteristics
3005
VCC=9V
No load
Rτ, Cτ
Outside constant
temperature bath
3000
Rotating speed N (rpm)
2995
0 50 100
Torque T (g-cm)
Circuit current–Supply voltage characteristics
5
4
3
2
Circuit current ICC (mA)
1
0
0 4 8 121620
Supply voltage VCC (V)
3000
Rotating speed N (rpm)
2995
-50
0255075
-25
Ambient temperature Ta(°C
Circuit current–Ambient temperature
characteristics
5
4
3
2
Circuit current ICC (mA)
1
0
-50 100
-25 0 25 50 75
Ambient temperature Ta (˚C)
100
MITSUBISHI <CONTROL / DRIVER IC>
)
)
M51971L/FP
MOTOR SPEED CONTROL
FG amplifier open loop voltage gain,
phase transition characteristics
100
80
60
40
20
Voltage gain AV (dB)
0
-20
10 100 1k 10k 100k 1M
Voltage gain
Phase
Frequency FIN (Hz)
Level shift voltage at pin – Ambient
temperature characteristics
3.0
2.5
1
1
2.0
1.5
VCC=9V
1
-90
-120
-150
Phase φ (degree)
Revel shift voltage at pin –
Input voltage characteristics at pin
2.5
VCC=9V
1
1
2.0
Level shift voltage at pin V LS (V)
1.5
-0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
Input voltage at pin V (V)
Voltage at pin – Output current
characteristics of pin
4
3
3
3
2
1 1
3
3
1
CC=9V
V
1 =0V
V
1
1.0
0.5
Level shift voltage at pin V LS (V)
0
-25 0 50 75
-50 25 100
Ambient temperature Ta(°C
Threshold voltage at pin – Ambient
4
temperature characteristics
50
40
30
4
Threshold voltage at pin (mV)
20
10
0
-10
-20
-30
-40
-50
-50 -25
Ambient temperature T
ON level
OFF level
25 50 75
0
a (°C)
100
Voltage at pin V (V)
1
0
-15 15
-10
Output current at pin I (mA)
0510
-5
3
Saturetion voltage at pin –Sink
current characteristics at pin
40
30
5 5
20
10
Saturation voltage at pin V S (mV)
0
0 1.20.2 0.4 0.6 0.8 1.0
Sink current at pin I(mA
5
3
5
5
VCC=9V
5
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