L7200

L7200 MOZART, 12V DISK DRIVE SPINDLE & VCM, POWER & CONTROL “COMBO” PRODUCT PREVIEW GENERAL s 12V (+/- 10%) OPERATION. s REGISTER BASED ARCHITECTURE s MINIMUM EXTERNAL COMPONENTS s BCD TECHNOLOGY VCM DRIVER s 1.7A DRIVE CAPABILITY s 0.75Ω T OTAL BRIDGE IMPEDANCE AT 125°C s LINEAR MODE s PHASE SHIFT MODULATION (PWM MODE) s INSTANTANEOUS, (GLICH FREE) SWITCH s BETWEEN THE 2 MODES. s CLASS AB OUTPUT DRIVERS s ZERO CROSSOVER DISTORSION s 14 BIT DAC DEFINE OUTPUT CURRENT s SELECTABLE TRANSCONDUCTANCE s RAMP LOADING & PARKING VOLTAGE s FULL INTERNAL VCM CALIBRATION s DYNAMIC BRAKE SPINDLE DRIVER s 2.5A DRIVE CAPABILITY s 0.75Ω T OTAL BRIDGE IMPEDANCE AT 125°C s SMOOTHDRIVE™ ARCHITECTURE s SINUSOIDAL DRIVING, VOLTAGE MODE s BIPOLAR DRIVING s BEMF, INTERNAL OR EXTERNAL, PROCESSING s SENSOR-LESS MOTOR COMMUTATION s PROGRAMMABLE COMMUTATION DELAY s FIXED FREQUENCY PWM OPERATION MODE s INTERNAL FREQUENCY LOCKED LOOP SPEED CONTROL (FLL) s PROGRAMMABLE DIGITAL FILTER FOR SPEED CONTROL LOOP s BEMF RECTIFICATION DURING RETRACT s BUILT-IN INDUCTIVE SENSING START UP s DYNAMIC & REVERSE BRAKE s BACK ROTATION DETECTION MULTIPOWER BCD TECHNOLOGY TQFP64 ORDERING NUMBER: L7200 OTHER FUNCTIONS s 12V, 5V , 3.3V AND 2.5V MONITORING WITH POSSIBLE EXTERNAL SET TRIP POINTS AND HYSTERESIS s POWER UP/DOWN SEQUENCING s 8V, 3.3V AND 2.5V POSITIVE REGULATORS s 3.3V LOGIC COMPATIBILITY s SHOCK SENSOR DETECTOR s INTERNAL POR DELAY TIME AT POWER ON (80ms) s INTERNAL ISOFET FOR BEMF RECTIFICATION s THERMAL SHUTDOWN AND PRETHERMAL WARNING DESCRIPTION The L7200 Mozart integrates into a single chip both spindle and VCM controllers as well as power stages. The device is designed for 12V disk drive application requiring up to 2.5A of spindle and 1.7A of VCM peak currents. The device is based on the sinusoidal driving of the spindle motor. This is realized digitally by the SMOOTHDRIVE™ SYSTEM. A serial port with up to 40 MHz capability provides easy interface to the microprocessor. A register controlled Frequency Locked Loop (FLL) allows flexibility in setting the spindle speed. Integrated BEMF processing, digital filter, digital masking, digital delay, and sequencing minimize the number of external components required. 1/23 September 1999 This is preliminary information on a new product now in development. Details are subject to change without notice. L7200 DESCRIPTION (continued) Power On Reset (POR) circuitry is included. Upon detection of a low voltage condition, POR is asserted, the internal registers are reset, and spindle power circuitry is tri-stated. The BEMF is rectified providing power for actuator retraction followed by dynamic spindle braking. Three Linear regulators and a Shock Sensor circuitry are also integrated. The device is built in BCD mixed signal technology allowing dense digital/analog circuitry to be combined with a high power DMOS output stage. BLOCK DIAGRAM SSBUFOUT VBOOST CHARGE PUMP SSFOUT SYSCLK BRAKE SSOUT RBIAS FCOM SSFIN SSIN PUMP SHOCK DETECTOR FLL & DIGITAL FILTER SPINDLE Architecture ISOFET PWM A VPS VCC OUT_A CTAP B A VREG3.3_IN 3.3V Re g ulator INDUCTIVE SENSE START-UP BIPOLAR / TRIPHASE PWM B VREG2.5_IN VREG8_DRV VREG8_IN 2.5V Re g ulator OUT_B OUT_C RSENSE ISENSE VCM_A+ VCC PWM C RE-SYNC C DYNAMIC/ REVERSE BRAKE 8V Re g ulator BEMF DETECTION A+ SDATA SCLK SDEN SERIAL PORT REGISTERS VCM PSM/LIN RAMP LOADING A- VCM CALIBRATION BEMF RECTIFICATION VCM_AVCM_GND SENSE_IN- TR_12V TR_5V TR_3.3V SUPPLY FAULT MONI T ORS THERMAL 14 BIT VCM DAC REFERENCE VOLTAGE VCC/4 & GAIN SWITCH A =4 SUPPLY SENSE_IN+ 2/23 ERROR_OUT SENSE_OUT ERROR_IN DAC_OUT GAINRES TR_2.5V PORB VDD DGND AVCC AGND GND L7200 SPINDLE SMOOTHDRIVE™ ARCHITECTURE, START-UP & FLL 6bit 8bit FEED FORWARD A B PWM A BYTE TO PWM CONVERTER A/D 7bit 8bit MEMORY AND MEMORY SCAN 3x 9bit DIGITAL MULTIPLIER PWM B 9bit Resolution POWERS 10bit 10bit BIPOLAR / TRIPHASE TORQUE OPTIMIZER KFLL d REGISTER DIGITAL FILTER 12bit FLL 10bit SPIN-UP 3x 10bit 2x 12bit INDUCTIVE SENSE SERIAL PORT FREQUENCY MULTIPLIER Z.C. BEMF DETECTION PIN CONNECTION (Top view) ERROR_OUT SENSE_OUT SENSE_IN+ ERROR_IN SENSE_INSDATA DGND VREG8_DRV VREG8_IN VCM_A+ VCM_A+ VCM_GND VCM_GND VCM_AVCM_AOUT_A OUT_A RSENSE RSENSE OUT_B OUT_B RSENSE RSENSE OUT_C OUT_C 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 1 VCC 47 46 45 44 GND VCC VCC 43 SCLK VPS VPS 42 41 SDEN 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 DAC_OUT PORB VREG3.3_IN VREG3.3_DRV VREG2.5_IN VREG2.5_DRV RBIAS AVCC AGND TR_12V TR_5V TR_3.3V TR_2.5V SSIN SSBUFOUT SSFIN L7200 "MOZART" 25 24 23 22 21 20 19 18 2 VCC 3 VPS 4 VPS 5 GND 6 SYSCLK 7 FCOM 8 VDD 9 BRAKE 10 ISENSE 11 CTAP 12 GAINRES 13 VBOOST 14 PUMP 15 SSOUT 17 16 SSFOUT C PWM C 3/23 L7200 PIN FUNCTION Pin Types: D = Digital, P = Power, A = Analog N° 1,2 3,4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Pin Name VCC VPS GND SYSCLK FCOM VDD BRAKE ISENSE CTAP GAINRES VBOOST PUMP SSOUT SSFOUT SSFIN SSBUFOUT SSIN TR_2.5V TR_3.3V TR_5V TR_12V AGND AVCC RBIAS +12V Power Supply after ISOFET. +12V Power Supply. Power Ground (substrate). Clock Frequency for system timers and counters Output of Spindle zero crossing or Current Sense circuit Digital +5V Supply Storage capacitor for brake circuit. Typically 5.9V Input to sense the voltage of the SPINDLE Sense Resistor. Spindle Center Tap used for Differential BEMF sensing External resistor for VCM switch gain. External main Charge Pump Capacitor (typically VCC+5.8V) External Charge Pump Shock Sensor detector Digital Output Shock Sensor detector filter Output Shock Sensor detector filter Input Shock Sensor detector amplifier Output Shock Sensor detector amplifier Input Set Point Input for 2.5V Supply monitor Set Point Input for 3.3V Supply monitor Set Point Input for 5V Supply monitor Set Point Input for 12V Supply monitor Analog Ground +12V analog Supply (after ISOFET) External resistor for setting accurate bias current Description Type P P P D D D A A A A A A D A A A A A A A A A P A A A A A A A A VREG2.5_DR 2.5V positive regulator drive output VREG2.5_IN 2.5V positive regulator sense input VREG3.3_DRV 3.3V positive regulator drive output VREG3.3_IN PORB DAC_OUT VREG8_DRV 3.3V positive regulator sense input Power On Reset Output Output of VCM DAC 8V positive regulator drive output 4/23 L7200 PIN FUNCTION (continued) N° 34 35 36 37 38 39 40 41 42 43 44 45,46 47,48 49,50 51,52 53,54 55,56 57,58 59,60 61,62 63,64 Pin Name VREG8_IN SENSE_INSENSE_IN+ SENSE_OUT 8V positive regulator sense input Inverting Input of the Sense Amplifier Non inverting Input of the Sense Amplifier Output of the Sense Amplifier Description Type A A A A A A D D D D P P P A A A A A A A A ERROR_OUT Output of the Error Amplifier ERROR_IN DGND SDEN SDATA SCLK GND VPS VCC VCM_A+ VCM_GND VCM_AOUT_A RSENSE OUT_B RSENSE OUT_C Inverting Input of the Error Amplifier Digital Ground Serial Data Enable. Active high input pin for serial port enable Serial port Data input/output Serial Port Data Clock. Positive edge triggered clock input for serial data Power Ground (substrate). +12V Power Supply. +12V Power Supply after ISOFET. VCM Power Amplifier positive Output terminal. Ground for VCM power section. VCM Power Amplifier negative Output terminal. Spindle DMOS half bridge Output and Input A for BEMF sensing. Output Connection for the Motor Current Sense Resistor to ground. Spindle DMOS half bridge Output and Input B for BEMF sensing. Output Connection for the Motor Current Sense Resistor to ground. Spindle DMOS half bridge Output and Input C for BEMF sensing. ABSOLUTE MAXIMUM RATINGS Symbol Vcc Vdd Vin max Vin min SPINDLE Ipeak VCM Ipeak Maximum Supply voltage Maximum Logic supply Maximum digital input voltage Minimum digital input voltage Spindle peak sink/source output current VCM peak sink/source output current Parameter Value -0.5 to 14 -0.5 to 6 Vdd + .3 volts GND - .3 volts 2.6 1.8 Unit Volts Volts Volts Volts Amps Amps 5/23 L7200 THERMAL DATA Symbol θ(jc) θ(ja)* Ptot* Tstg,Tj Parameter Thermal resistance Junction to case Thermal resistance Junction to ambient Maximum Total Power Dissipation Maximum storage/junction temperature Value ≈11 ≈40 ≈2.0 -40 to 150 Unit °C/Watt °C/Watt Watt °C * In typical application with multilayer 120x120mm Printed Circuit Board. RECOMMENDED OPERATING CONDITIONS Symbol Vdd Vcc Tamb Tj Supply Voltage Logic Supply Voltage Operating Ambient Temperature Junction Temperature Parameter Value 10.8 to 13.2 4.5 to 5.5 0 to 70 0 to 125 Unit V V °C °C ELECTRICAL CHARACTERISTCS All specifications are for 016µS sample, either mechanical or electrical). “1” Indicates that the Inductive Sense threshold is not reached. “1” Indicates that the Phase reading of the motor succeded. “1” Indicates that the Spindle BEMF is not detected. Inductive Sense Phase detected. First Bit. Inductive Sense Phase detected. Second Bit. Inductive Sense Phase detected. Third Bit. “1” Indicateds a Back rotation of the Spindle Motor. 19/23 L7200 INTERNAL REGISTERS DEFINITION (continued) Reg: Name: Type: 16 System Diagnostic Register Read only Address: 1Fh BIT 0 1 2 3 4 5 LABEL PHASEFINE PHASEFINE PHASEFINE PHASEFINE THWARNING THSHUTDOWN DESCRIPTION Torque Optimizer Phase Shift. First Bit. Torque Optimizer Phase Shift. Second Bit. Torque Optimizer Phase Shift. Third Bit. Torque Optimizer Phase Shift. Fourth Bit. Thermal Warning. “1” Indicates that the Device temperature is approximately 25°C lower than the thermal shutdown’s one. Thermal Shutdown. “1” Indicates that the Device temperature has exceeded 160°C. The bit will reset (=0) when the temperature drops below 130°C. Outputs of the Calibration Comparator. “1” Indicates that the Voicel Coil is Retracting. 6 7 VCMCAL RET Reg: Name: Type: 17 ID Register Read only Address: 2Fh BIT 0 1 2 3 4 5 6 7 ID_REV0 ID_REV1 ID_REV2 ID_REV3 ID_REV4 ID_REV5 ID_REV6 ID_REV7 LABEL DESCRIPTION Device Minor Revision. First Bit. Device Minor Revision. Second Bit. Device Minor Revision. Third Bit. Device Minor Revision. Fourth Bit. Device Major Revision. First Bit. Device Major Revision. Second Bit. Device Major Revision. Third Bit. Device Major Revision. Fourth Bit. 20/23 L7200 APPLICATION CIRCUIT OUT_A OUT_B OUT_C CTAP 0 .3ohm / 1W 2 .2uF 5V 24 44 56 55 60 59 64 63 11 62 61 58 RSENSE OUT_B OUT_B OUT_A BRAKE OUT_A OUT_C OUT_C CTAP RSENSE RSENSE RSENSE AGND GND GND VDD 57 9 8 5 12V 10 33 PNP 34 1 0uF 3 4 29 PNP 30 1 0uF 46 45 27 PNP 28 1 0uF 12 32 39 38 6 2K 37 1nF 1 0K 1 2K 6 0K 12V 5V 12V 5V 25 1 VCC 22uF/25V Tantalum + 2 47 48 40 SYSCLK SDEN SDATA SCLK FCOM PORB SENSOR OUT SENSOR IN 3 3nF 1 0K 6 41 42 43 7 31 15 19 18 17 3 30pF AVCC VCC VCC VCC VCC DGND SYSCLK SDEN SDATA SCLK FCOM PORB SSOUT SSIN SENSE_IN+ SSBUFOUT VBOOST SSFOUT VCM_AVCM_ASSFIN SENSE_INVCM_GND VCM_GND ISENSE VREG8_DRV VREG8_IN VPS VPS VREG3.3_DRV "MOZART" TQFP64 VREG3.3_IN VPS VPS VREG2.5_DRV VREG2.5_IN GAINRES DAC_OUT ERROR_IN ERROR_OUT VCM_A+ VCM_A+ TR_3.3V TR_2.5V 20 TR_12V SENSE_OUT RBIAS 26 21.5K 16 13 14 51 52 53 54 35 36 49 50 23 22 TR_5V PUMP 1 00K 1 N4148 47nF 1uF 1 N4148 VCC VCM_A- VCM_A+ 0.25ohm 1W Analog Ground Power Ground VCM Ground 21 Digital Ground 21/23 L7200 DIM. MIN. A A1 A2 B C D D1 D3 e E E1 E3 L L1 K 0.40 0.05 1.35 0.18 0.12 mm TYP. MAX. 1.60 0.15 1.40 0.23 0.16 12.00 10.00 7.50 0.50 12.00 10.00 7.50 0.60 1.00 0°(min.), 7°(max.) 0.75 1.45 0.28 0.20 0.002 0.053 0.007 MIN. inch TYP. MAX. 0.063 0.006 0.055 0.009 0.057 0.011 OUTLINE AND MECHANICAL DATA 0.0047 0.0063 0.0079 0.472 0.394 0.295 0.0197 0.472 0.394 0.295 0.0157 0.0236 0.0295 0.0393 TQFP64 D D1 A D3 A1 48 49 33 32 0.10mm Seating Plane A2 B E3 E1 64 1 e 16 17 C L1 E L K TQFP64 22/23 B L7200 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics ® 1999 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 23/23