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PDF ( 数据手册 , 数据表 ) L7200

零件编号 L7200
描述 MOZART/ 12V DISK DRIVE SPINDLE & VCM/ POWER & CONTROL COMBO
制造商 STMicroelectronics
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L7200 数据手册, 描述, 功能
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
MULTIPOWER BCD TECHNOLOGY
VCM DRIVER
s 1.7A DRIVE CAPABILITY
s 0.75TOTAL 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 0.75TOTAL 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
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 stag-
es. The device is designed for 12V disk drive appli-
cation requiring up to 2.5A of spindle and 1.7A of
VCM peak currents. The device is based on the sinu-
soidal 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 con-
trolled Frequency Locked Loop (FLL) allows flexibility
in setting the spindle speed. Integrated BEMF pro-
cessing, digital filter, digital masking, digital delay,
and sequencing minimize the number of external
components required.
September 1999
This is preliminary information on a new product now in development. Details are subject to change without notice.
1/23







L7200 pdf, 数据表
L7200
ELECTRICAL CHARACTERISTCS (continued)
Symbol
Parameter
Test Condition
VICM INPUT COMMON MODE
RANGE
FODB UNITY GAIN BANDWIDTH
VCM, POWER STAGE
RDS(ON) Output On Resistance (Each
Device)
Tj = 25°C
Tj = 125°C
Io Operating Current
IO(LEAK) Output Leakage Current
Vcc = 14V
VCM, CURRENT SENSE AMPLIFIER
AV Voltage Gain
VICM Input Common Mode Range
VOCM Output Common Mode Range -1mA < Io < 1mA
VOS Output Offset Voltage
SENSE_IN(-/+) = Vcc/4
F3dB 3dB Bandwidth
CMRR Input Common Mode Rejection
Ratio
PSRR Power Supply Rejection Ratio
VCM RETRACT
Vpark Retract Voltage
PKV=0 & PKV1=0 & PKV2=0
PKV=1 & PKV1=0 & PKV2=0
PKV=0 & PKV1=1 & PKV2=0
PKV=1 & PKV1=1 & PKV2=0
PKV=0 & PKV1=0 & PKV2=1
PKV=1 & PKV1=0 & PKV2=1
PKV=0 & PKV1=1 & PKV2=1
PKV=1 & PKV1=1 & PKV2=1
Tretract
Retract Time
limited by the internal
oscillator 200KHz
RT0 = 0 & RT1 = 0
RT0 = 1 & RT1 = 0
RT0 = 0 & RT1 = 1
RT0 = 1 & RT1 = 1
SPINDLE, PWM CURRENT SENSE COMPARATOR
TDLY Delay to Fcom Out
SPINDLE, POWER STAGE
RDS(ON) Output On Resistance (each
device)
Tj = 25°C
Tj = 125°C
Io Start-up Current
IO(LEAK) Output Leakage Current
VCC = 14V
Min. Typ. Max.
VCC/4
+/-1.5
10
Unit
V
MHz
0.25
0.35
1.3
1.0
A
mA
3.88 4 4.12 V/V
-0.3 Vcc V
+0.3
1.5 4.5 V
10 mV
3 MHz
50 dB
60 dB
0.30
0.60
0.90
1.20
1.50
1.80
2.10
2.40
80
160
320
640
V
ms
200 500
ns
0.25
0.35
2
1.0
A
mA
8/23







L7200 equivalent, schematic
L7200
INTERNAL REGISTERS DEFINITION (continued)
Reg:
9
Name: Spindle FLL Filter Coefficient B1 Register
Type: Write only
Address: 9Eh
BIT LABEL
0 COEFF_B1<0>
1 COEFF_B1<1>
2 COEFF_B1<2>
3 COEFF_B1<3>
4 COEFF_B1<4>
5 COEFF_B1<5>
6 COEFF_B1<6>
7 COEFF_B1<7>
DESCRIPTION
LSB of Spindle FLL filter coefficient B1.
Bit 1 of Spindle FLL filter coefficient B1.
Bit 2 of Spindle FLL filter coefficient B1.
Bit 3 of Spindle FLL filter coefficient B1.
Bit 4 of Spindle FLL filter coefficient B1.
Bit 5 of Spindle FLL filter coefficient B1.
Bit 6 of Spindle FLL filter coefficient B1.
Bit 7 of Spindle FLL filter coefficient B1.
Reg:
10
Name: Voice Coil DAC 0 Register
Type: Write only
Address: AEh
BIT LABEL
0 VCMDAC<0>
1 VCMDAC<1>
2 VCMDAC<2>
3 VCMDAC<3>
4 VCMDAC<4>
5 VCMDAC<5>
6 VCMDAC<6>
7 VCMDAC<7>
LSB of Voice Coil DAC.
Bit 1 of Voice Coil DAC.
Bit 2 of Voice Coil DAC.
Bit 3 of Voice Coil DAC.
Bit 4 of Voice Coil DAC.
Bit 5 of Voice Coil DAC.
Bit 6 of Voice Coil DAC.
Bit 7 of Voice Coil DAC.
DESCRIPTION
16/23










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