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What is M51971L?

This electronic component, produced by the manufacturer "Mitsubishi", performs the same function as "MOTOR SPEED CONTROL".


M51971L Datasheet PDF - Mitsubishi

Part Number M51971L
Description MOTOR SPEED CONTROL
Manufacturers Mitsubishi 
Logo Mitsubishi Logo 


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MITSUBISHI <CONTROL / DRIVER IC>
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
q Wide range of supply voltage • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 4 – 17.5V
qVariation coefficient of supply voltage • • • • • ±0.005%/V (standard)
qLoad variation coefficient • • • • • ±0.01% (standard, full load range)
qTemperature coefficient of rotating speed • • • • 7ppm/˚C (standard)
qBuilt-in high performance FG amplifier
APPLICATION
Motor rotating speed control in 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 1 • • • • • • • • • • • • • • • • • -0.4 – Vcc Note 1
Input voltage range at pin 4 • • • • • • • • • • • • • • • • • • • • • • • • • • -0.4 – Vcc
Highest setup tacho-generator frequency • • • • • • • • • • • • • • • • 2.5kHz
Minimum trigger pulse width (input pulse at pin 4 )
• • • • • • • • • • 40µs Note 2
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.
PIN CONFIGURATION (TOP VIEW)
Non-inverted input 1
Inverted input 2
Amplifier output 3
Schmitt input 4
Time constant 5
Stabilized voltage 6
GND 7
Integration capacitance 8
Output 9
Power supply 10
Outline 10P5
Non-inverted input 1
Inverted input 2
Amplifier output 3
Schmitt input 4
Time constant 5
10 Power supply
9 Output
8 Integration capacitance
7 GND
6 Stabilized voltage
Outline 10P2-C
BLOCK DIAGRAM
Amplifier Schmitt
output intput
34
Time constant
5
Integration
capacitance
8
Operational
VLS amplifier
Non-inverted input 1
1.9V
Inverted input 2
Schmitt
comparator
Timer
Constant
current
control
Buffer
amplifier
VLS 1.9V
Over-shoot
prevention
circuit
Power supply 10
Stabilized supply
voltage
9 Output
7
GND
6
Stabilized
voltage

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M51971L equivalent
Stabilized voltage–Supply voltage
characteristics
3.0
2.8
2.6
2.4
2.2
2.0
0
4 8 12 16 20
Supply voltage VCC (V)
24
Stabilized voltage–Source current
characteristics of pin 6
2.8
VCC=9V
2.7
2.6
0 1234
Source current at pin 6 I 6 (mA)
5
Charging current at pin 8 – Ambient
temperature characteristics
-300
-250
VCC=9V
-200
-150
-100
-50
0
-50 -25 0
25 50 75
Ambient temperature Ta (°C)
100
MITSUBISHI <CONTROL / DRIVER IC>
M51971L/FP
MOTOR SPEED CONTROL
Stabilized voltage–ambient
temperature characteristics
5
VCC=9V
4
3
2
2
1
-50 -25 0 25 50 75 100
Ambient temperature Ta (°C)
Voltage at pin 8 – Input signal
frequency characteristics
4
VCC=9V
3
2
1
0
401.5
402.0
402.5
403.0
Pin 8 – input signal frequency fIN (Hz)
Discharging current at pin 8 – Ambient
temperature characteristics
30
VCC=9V
25
20
15
10
5
0
-50 -25 0
25 50 75 100
Ambient temperature Ta (°C)


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Featured Datasheets

Part NumberDescriptionMFRS
M51971FPThe function is MOTOR SPEED CONTROL. MitsubishiMitsubishi
M51971LThe function is MOTOR SPEED CONTROL. MitsubishiMitsubishi

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