KA3120 Datasheet - 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 <.

PRELIMINARY HDD PRODUCTS KA3120 SPINDLE & VOICE COIL MOTOR ONE CHIP DRIVER The KA3120 is an ASIC combination chip, which was designed for the HDD, includes the following functions: spindle motor drive, voice coil motor drive, retract and power management. To drive and control the spindle, the digital ASIC provides the appropriate control signals (Start up, commutation, speed control) to the KA3120. The spindle motor condition is monitored by the FG output and the motor speed control is accomp.

KA3120 Features

* SPINDLE MOTOR DRIVE PART

* 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 INFOR

KA3120 Datasheet (848.18 KB)