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

● Variation coefficient of supply voltage•••••±0.005/V(standard)

● Load variation coefficient•••••±0.01(standard,full loadrange)

● Temperature coefficient of rotating speed • • • • 7ppm/˚C (standard)

● Built-in high performance FG amplifier

APPLICATION

Motor rotating speed control in floppy disk driver, player, tape recorder, car stereo, etc.