M51971FP Mitsubishi, M51971FP Datasheet
M51971FP
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M51971FP Summary of contents
Page 1
... Amplifier Schmitt output intput Time constant 3 4 Schmitt comparator Timer V 1. Stabilized GND voltage MITSUBISHI <CONTROL / DRIVER IC> M51971L/FP MOTOR SPEED CONTROL Non-inverted input 1 Inverted input 2 Amplifier output 3 Schmitt input 4 Time constant 5 Stabilized voltage 6 GND 7 Integration capacitance 8 ...
Page 2
... -20mA 1V M51971L/FP MOTOR SPEED CONTROL 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. 4.0 17.5 6.0 3.2 2.44 2.71 2.98 -3.0 -0.5 -180 -30 2.27 1.51 1. 0.4 2.0 as the reference ...
Page 3
... TYPICAL CHARACTERISTICS Thermal Derating (Maximum Rating) 1000 M51971L 800 600 M51971FP 400 200 Ambient temperature T Rotating speed–Motor torque characteristics 3005 3000 2995 0 50 Torque T (g-cm) Circuit current–Supply voltage characteristics Supply voltage V CC Rotating speed–Supply voltage characteristics ...
Page 4
... ON level -10 OFF level -20 -30 -40 -50 -50 - Ambient temperature MITSUBISHI <CONTROL / DRIVER IC> Revel shift voltage at pin Input voltage characteristics at pin 2.5 2.0 -90 -120 -150 1.5 1M -0.6 -0.4 -0.2 Voltage at pin characteristics of pin -15 100 Saturetion voltage at pin current characteristics at pin ...
Page 5
... Charging current at pin – Ambient 8 temperature characteristics -300 V =9V CC -250 -200 -150 -100 -50 0 -50 - Ambient temperature MITSUBISHI <CONTROL / DRIVER IC> -50 Voltage at pin frequency characteristics 401.5 Pin Discharging current at pin temperature characteristics 30 25 ...
Page 6
... R can be put in the range of 10k take care for leak current that may flow on the surface of the printed circuit board. MITSUBISHI <CONTROL / DRIVER IC> M51971L/FP MOTOR SPEED CONTROL Buffer amplifier offset voltage – Voltage characteristics at pin ...
Page 7
... R Buffer amplifier The buffer circuit is a voltage follower circuit using an operational amplifier. The input current is very small (10nA max.) and the circuit can drive the output current of 20mA. – MITSUBISHI <CONTROL / DRIVER IC> M51971L/FP MOTOR SPEED CONTROL To pin 6 7.5k R comparator ...
Page 8
... T G Control signal 3 100 Control signal To pin To pin 10 To pin 6 100 9 3k II. Normal operation to rapid discharging operation A, A’ 1.09T MITSUBISHI <CONTROL / DRIVER IC> M51971L/FP MOTOR SPEED CONTROL To pin 8 200 To pin pin 10 7.5k 5 15k I Approx ...
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... M51971L 9 M51971FP GND is approx. 1.9V M51971L 9 M51971FP 7 8 Control signal When Q is set Stops the motor. 1 When Q is set to OFF : Controls the motor rotating speed ...
Page 10
... 200 1 M51971L 9 M51971FP 0.7V BE2 ~ ~ I = max 200 1 M51971L 9 M51971FP – max M BE2 BE1 0. • TH2 ...
Page 11
... If the gain of the circuit connected to the back of pin M51971 is assumed and, therefore, the entire circuit is as follows (2) (3) (4) (5) MITSUBISHI <CONTROL / DRIVER IC> M51971L/FP MOTOR SPEED CONTROL M log Approximate motor transfer function to the output at pin 4 (output voltage at pin ) 9 ...
Page 12
... C • • (12) G • • • • • • • • • • • • • • MITSUBISHI <CONTROL / DRIVER IC> M51971L/FP MOTOR SPEED CONTROL / (radian) must be taken into G *( the following relation must be established. B > • ...
Page 13
... Supply step-shape current to the motor in static status, measure time M then find MITSUBISHI <CONTROL / DRIVER IC> M51971L/FP MOTOR SPEED CONTROL M is found by measuring the motor frequency response until the motor speed reaches 63% of the final speed and by the following formula. ...