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M51970L
Part Number
M51970L
Manufacturer
Mitsubishi
Description
MOTOR SPEED CONTROL
Published
Apr 23, 2005
Detailed Description
MITSUBISHI
M51970L MOTOR SPEED CONTROL DESCRIPTION The M51970L is a semiconductor integrated cir...
Datasheet
M51970L
PDF File
Overview
MITSUBISHI
M51970L MOTOR SPEED CONTROL DESCRIPTION The M51970L is a semiconductor integrated circuit designed to control the motor rotating speed.
Connection of the rotating speed detector (F-G detector) to the input keeps the motor rotating speed constant with high precision.
Connection of an appropriate power
transistor
to the output controls a wide range of DC motors.
PIN CONFIGURATION (TOP VIEW) Time constant Input 1 2 3 FEATURES q Wide range of supply voltage • • • • • • • • • • • • • 2.
5 – 18V (-20 – +75˚C) q Variation coefficient of supply voltage • • • • • • • • • • • ±0.
1% standard (4 – 15V) q Load variation coefficient • • • • • • • • • • • • • • • • • • • • • • • • • • ±0.
1% standard q Temperature coefficient of rotating speed • • • • • • • • • • • • • • ±10 ppm/˚C (standard) (-20 – +75˚C) q The built-in over-shoot prevention circuit keeps the over-shoot low.
q DC drive system with minimum RFI Stabilized voltage (+)GND (–)Power supply Output Current limit resistance Integration capacitance M51970L Outline 8P5 4 5 6 7 8 APPLICATION Motor rotating control in the player, tape recorder, etc.
RECOMMENDED OPERATING CONDITIONS Supply voltage range • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 2.
5 – 18V Rated supply voltage • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 9V BLOCK DIAGRAM Time constant 1 Integrated capacitance 8 Current limit circuit 7 Current limit resistance Input 2 Amplifier Mono multivibrator Integrator Current amplifier 6 Output (+)GND 4 (–)Power supply 5 Stabilized power supply Overshoot prevention circuit 3 Stabilized voltage MITSUBISHI
M51970L MOTOR SPEED CONTROL ABSOLUTE MAXIMUM RATINGS (Ta=25°C unless otherwise noted) Symbol Vcc I6 I3 PdF KθF Topr Tstg Parameter Supply voltage Sink current into 6 pin Source current from 3 pin Power dissipation Thermal derating Operating temperature St...
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