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PDF L7200 Data sheet ( Hoja de datos )
| Número de pieza | L7200 | |
| Descripción | MOZART/ 12V DISK DRIVE SPINDLE & VCM/ POWER & CONTROL COMBO | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de L7200 (archivo pdf) en la parte inferior de esta página. Total 23 Páginas | ||
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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 0.75Ω TOTAL 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 TOTAL 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
1 page  
PIN FUNCTION (continued)
N° Pin Name
Description
34 VREG8_IN 8V positive regulator sense input
35 SENSE_IN- Inverting Input of the Sense Amplifier
36 SENSE_IN+ Non inverting Input of the Sense Amplifier
37 SENSE_OUT Output of the Sense Amplifier
38 ERROR_OUT Output of the Error Amplifier
39 ERROR_IN Inverting Input of the Error Amplifier
40
DGND
Digital Ground
41
SDEN
Serial Data Enable. Active high input pin for serial port enable
42
SDATA
Serial port Data input/output
43
SCLK
Serial Port Data Clock. Positive edge triggered clock input for serial data
44
GND
Power Ground (substrate).
45,46
VPS
+12V Power Supply.
47,48
VCC
+12V Power Supply after ISOFET.
49,50 VCM_A+ VCM Power Amplifier positive Output terminal.
51,52 VCM_GND Ground for VCM power section.
53,54
VCM_A- VCM Power Amplifier negative Output terminal.
55,56
OUT_A Spindle DMOS half bridge Output and Input A for BEMF sensing.
57,58 RSENSE Output Connection for the Motor Current Sense Resistor to ground.
59,60
OUT_B Spindle DMOS half bridge Output and Input B for BEMF sensing.
61,62 RSENSE Output Connection for the Motor Current Sense Resistor to ground.
63,64
OUT_C Spindle DMOS half bridge Output and Input C for BEMF sensing.
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Vcc Maximum Supply voltage
Vdd Maximum Logic supply
Vin max Maximum digital input voltage
Vin min Minimum digital input voltage
SPINDLE Spindle peak sink/source output current
Ipeak
VCM Ipeak VCM peak sink/source output current
Value
-0.5 to 14
-0.5 to 6
Vdd + .3 volts
GND - .3 volts
2.6
1.8
L7200
Type
A
A
A
A
A
A
D
D
D
D
P
P
P
A
A
A
A
A
A
A
A
Unit
Volts
Volts
Volts
Volts
Amps
Amps
5/23
5 Page 
L7200
latched after the 16th SCLK pulse. If less than 16 clock pulses are provided before SDEN goes low, the data
transfer is aborted.
All transfers are shifted into the serial port LSB first. The first byte of the transfer is for Address and Instruction
information. The first bit is R/W instruction bit, 0 is for WRITE and 1 is for READ. Following 3 bits are for
Combo Data Bank (all set to ‘1’). The last 4 bits are for Register Address.
Figure 2. Serial Port Data Transfer Format
SDEN
SCLK
SDATA
INSTRUCTION (READ/WRITE), 1BIT
ADDRESS, COMBO DATA BANK, 3 BITS
ADDRESS, 4 BITS
DATA, 8 BITS
INTERNAL REGISTERS DEFINITION
Reg:
0
Name: Spindle Spin-Up Register
Type: Write only
Address: 0Eh
BIT
0 START
LABEL
1 EXTERNAL
2 SEQINC
3 STOP
4 INDSENSE
5 SPCOAST
6 SPINUPTIME 0
7 SPINUPTIME 1
DESCRIPTION
“0” Reset and Brakes the Spindle. “1” Initiates the Spindle Start-Up
procedure.
“0” Spindle BEMF processing in internal mode. “1” External mode.
In external mode, a “0” to ”1” transition, increments the Spindle
Sequencer.
“0” Complete Internal Spindle Start-Up. “1” Stop after Inductive Sense
“0” Normal condition. “1” in External mode, initiate the Inductive
Sense
“0” Spindle Outputs Enabled. “1” Disabled.
Spindle Internal Spin Up.
Bit 7
Bit 6
Time
Energization Time. First Bit.
00
10mS
Spindle Internal Spin Up.
01
20mS
Energization Time. Second Bit. 1 0
30mS
11
40mS
11/23
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet L7200.PDF ] | |
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