L6260

L6260 4.5 – 5.5V DISK DRIVER SPINDLE & VCM, POWER & CONTROL COMBO’S GENERAL 5V OPERATION. *REGISTER BASED ARCHITECTURE MINIMUM EXTERNAL COMPONENTS SLEEP AND IDLE MODES FOR LOW POWER CONSUMPTION SELECTABLE GAINS FOR BOTH V.C.M. AND SPINDLE 10 BIT (+ SIGN + GAIN ) VCM & 8 BIT SPINDLE DACs HIGH BANDWIDTH SPEED REGULATION LOOP (ONCE PER MECH\ELEC CYCLE ACCURACY) VCM DRIVER CURRENT SENSE CONTROL (VOLTAGE PROPORTIONAL TO CURRENT) 300mA DRIVE CAPABILITY TWO CURRENT RANGES FOR SEEKING AND TRACKING INTERNAL REGISTER FOR POWER AMP CONTROL LINES SPINDLE DRIVER BEMF PROCESSING FOR SENSORLESS MOTOR COMMUTATION PROGRAMMABLE COMMUTATION PHASE DELAY PROGRAMMABLE SLEW-RATE FOR REDUCED E.M.I. 0.8Ω FOR ANY HALF BRIDGE WORST CASE SYNCHRONOUS RECTIFICATION OF THE B.E.M.F. DURING RETRACT OPERATION BIPOLAR \ TRIPOLAR OPERATION SYNTHESIZED HALL OUTPUTS 1.0 AMP DRIVE CAPABILITY OTHER FUNCTIONS POWER UP SEQUENCING POWER DOWN SEQUENCING LOW VOLTAGE SENSE ACTUATOR RETRACTION DYNAMIC BRAKE THERMAL SHUTDOWN November 1996 BICMOS TECHNOLOGY TQFP64 ORDERING NUMBER: L6260 THERMAL & CURRENT PROTECTION DESCRIPTION The L6260 is single chip sensorless (DC) spindle motor and voice coil controllers including power stages suitable for use in small disk drives. These devices have a serial interface for a microprocessor running up to 10 Mega bits per second. There are registers on chip to allow the setting of the desired spindle speed via the on chip Frequency Locked Loop (F.L.L.). No external components are require...