參數(shù)資料
型號(hào)： OM5193
廠商： NXP Semiconductors N.V.
英文描述： Disk drive spindle and VCM with servo controller
中文描述： 磁盤(pán)驅(qū)動(dòng)器主軸和氯乙烯的伺服控制器
文件頁(yè)數(shù)： 3/56頁(yè)
文件大?。?/td> 246K
代理商： OM5193
1998 Nov 02
3
Philips Semiconductors
Product specification
Disk drive spindle and VCM with
servo controller
OM5193H
1
FEATURES
1.1
Servo control
10-bit VCM Digital-to-Analog Converter (DAC)
7-channel 10-bit Analog-to-Digital Converter (ADC)
Programmable spindle commutation control logic
3-wire serial interface
Two stand-alone operational amplifiers (op-amps) with
outputs connected to the ADC
Analog multiplexer with two inputs used to select VCM
seek mode or track-following mode.
1.2
Motor control
1.2.1
S
PINDLE MOTOR DRIVER
3-phase output motor driver
1.9 A maximum available start-up current
Total R
ds(on)
= 0.6
(typical) at 25
°
C
Back ElectroMotive Force (BEMF) processing for
sensorless motor commutation
Linear current control
External current sense resistor
External current control loop compensation
Adjustable slew rate control
Short-circuit brake
Adjustable brake-after-park delay time.
1.2.2
V
OICE COIL MOTOR DRIVER
1.5 A maximum current capability
Total R
ds(on)
= 0.8
(typical) at 25
°
C
Linear class AB output with low cross-over distortion
delay
Precision current control loop with external current
sense resistor
Programmable seek and track-following mode with
adjustable current loop gain
External current control loop compensation
Precharge during brake mode
20 kHz current control loop bandwidth
Parking function
Adjustable park voltage with limiter.
1.3
Miscellaneous items
Precision low voltage 5 and 12 V power monitor with
hysteresis
Precision internal voltage reference for servo and power
control circuits
Thermal sense circuit with over-temperature shutdown
sensor
Internal charge pump voltage generator
Automatic brake-after-park at power-down, thermal
shutdown or sleep mode
Sleep mode: low power consumption mode.
2
APPLICATIONS
12 V hard disk drive products.
3
GENERAL DESCRIPTION
3.1
Overview
The OM5193H is a combination of a voice coil motor and
a spindle motor driver with embedded servo controller
designed for use in disk drives. Configuration and control
registers are set via a 3-wire serial port running up to
30 MHz to interface commonly to a microcontroller or a
digital signal processor.
The device operates at 5 and 12 V power supplies and
integrates safety functions such as power stages
overvoltage protection, power and temperature monitor,
over-temperature shutdown and dynamic
brake-after-park.
The device is contained in a QFP80 package with 18 pins
connected to the leadframe thus providing low thermal
resistance.
3.2
Servo controller
The servo controller includes the following circuits:
3-wire serial interface
Spindle commutation logic
A 10-bit ADC with 7 inputs selected by an internal
multiplexer
A 10-bit VCM DAC with 1.5, 2.5 and 3.5 V voltage
references
Two low-offset stand-alone op-amps
Analog multiplexer with 2 inputs.
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