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参数资料
| 型号： | 8980 |
| 厂商： | Allegro MicroSystems, Inc. |
| 英文描述： | SUPERSERVO SPINDLE & VOICE-COIL ACTUATION MANAGER/DRIVER |
| 中文描述： | SUPERSERVO主轴 |
| 文件页数： | 2/8页 |
| 文件大小： | 81K |
| 代理商： | 8980 |
8980
S
UPER
S
ERVO
SPINDLE & VOICE-COIL
ACTUATION MANAGER/DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright 1992, 1994, Allegro MicroSystems, Inc.
FUNCTIONAL BLOCK DIAGRAM
Dwg. FP-028B
DIGITAL MUX OUT
DATA ENABLE
2 V REF
V REF
ANALOG MUX 1
CLOCK
TACH
UV TRIP ADJUST
ANALOG MUX 2
EXTERNAL
COMMUTATION
2 MHz CLOCK
RETRACT
SERIAL DATA IN
BACK-EMF AND
COMMUTATION LOGIC
CONFIGURATION
CONTROL
SERVO CONTROL
μ
C
SLEW
RATE
CONTROL
POWER-ON
RESET (TO
μ
C)
gm
Rgm
Rgm
ENERGY MANAGER
CONTROLLED RETRACT
DC-DC CONVERSION
SLEEP MODES
UV FAULT
THERMAL SHUTDOWN
TUNABLE
LOW-PASS
FILTER
NOTCH
FREQUENCY,
DEPTH, &
DAMPING
OVER-VELOCITY FAULT
12-BIT
SERVO-
DEMAND
DAC
8-BIT
SPIN-DEMAND
DAC
IN / OUT MUX
gm
Energy Manager:
I
3.0 V to 5.5 V Operation
I
Independent Power-Down (Sleep) Modes for all
Functional Blocks
I
Efficient Synchronous Rectification Supplies Power
During Blackout
I
Thermal Fault Shutdown Circuitry
I
Trimmed Bandgap Voltage Reference
I
Smart DAC Reference Generator
I
Programmable Voltage Reference for Relative Ground
I
Over-Velocity Fault Circuitry
I
Supply Under-Voltage Monitor with Adjustable
Trip Point
I
System Diagnostics Data Out
I
Power-On Reset Generator
Spindle Motor Controller/Driver:
I
Low r
DS(on)
MOS Outputs
I
Back-EMF Circuitry Eliminates Hall-Effect Sensors
I
Programmable Slew Rate Eliminates Snubbers
I
Lossless Current Sensing
I
Improved Speed Disturbance Performance
I
Dynamic Braking with Delay
I
Active Braking
Servo Compensator/Notch:
I
Over-Velocity Fault Circuitry
I
12-Bit Servo-Demand DAC
I
Programmable Complex Pole Low-pass-Filter
I
Programmable Notch Frequency, Depth, and Damping
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