KA3120 - Fairchild Semiconductor

KA3120 SPINDLE & VOICE COIL MOTOR ONE CHIP DRIVER

Pin No. 1 2 3 4 5 6 www.DataSheet4U.com Symbol PWMSF CFSF ADJ SENSE5 VDD FG VREF MCLK VCMOFF POR CDLY GAINSEL PWMH PWML CFVCM CRET VCC FILOUT SENSE CRET2 PVCC VCM(−) SUBGND RRET SENSEOUT PGND VCM(+) ERRIN VDD ERROUT SUBGND W I/O I − − I − O O I O O − I I I − − − O I − − − − I O − − I − O − O Description PWM input for spindle soft switching Capacitor for s.

Features

SPINDLE MOTOR DRIVE PART
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• Soft switching Spindle brake after retract Adjustable brake delay time 2.0A max. current power driver Low output saturation voltage: 1V typical @1.6A PWM decoder & filter for soft switching ORDERING INFORMATION Device KA3120 Package 48-QFPH-1414 Operating Temperature 0 ~ 70°C The digital circuit (ASIC) based start-up, commutation and motor speed control VOICE COIL MOTOR DRIVE PART
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• Trimmed low offset current 1.2A max. current power driver Gain selection and adjustable gain Automatic power down retract function Class AB linear amplifier w.