L6260 Datasheet | STMicroelectronics

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 ponents are required in the sensor-less operation as the control functions are integrated on chip (e.g. B.E.M.F. processing, digital masking, digital delay and sequencing). The V.C.M. drivers uses a transconductance amplifier, able to provide 2 different current ranges, suitable for seeking and tracking. When a low voltage is detected, a Power On Reset (P.O.R.) is issued and the internal registers are reset, the spindle power circuitry is tri-stated, B.E.M.F. synchronous rectification is enabled, the actuator retracts and then dynamic braking of the spindle is applied. These devices are built in BICMOS technology allowing dense digital circuitry to be bined with MOSBipolar power devices. 1/30 BLOCK DIAGRAM VREFOUT VREF/MINUS DAC/GND UV1 UV2 POR/DLY POR FCLK SDIO SCLK SLOAD R/W TEST TRISTATE ATEST DTEST BIAS - CIRCUIT + POWER MONITOR SERIAL PORT INTERFACE REGISTER 0 REGISTER 1 REGISTER 2 REGISTER 3 REGISTER 4 REGISTER 5 REGISTER 6 REGISTER 7 PARK/V VCM/P VCM/I/SNS/1 VCM/I/SNS/2 VCM/PLUS VCM LOGIC & DAC VCM PARK BEMF AMP SPINDLE LOGIC VOLTAGE TRIPLER CENTER TAP DRIVER SPINDLE BLOCK & DAC SPINDLE FLL ANALOG TEST CIRCUIT DIGITAL TEST CIRCUIT CURRENT GENERATOR CHARGE PUMP PIN CONNECTION(Top view) VCM/MINUS VVCM/2 VVCM/1 C1LOW C1HIGH C2LOW C2HIGH VHTRIP VLTRIP...