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參數(shù)資料
| 型號： | KA3120 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | SPINDLE & VOICE COIL MOTOR ONE CHIP DRIVER |
| 中文描述： | VOICE COIL MOTOR CONTROLLER, 2 A, PQFP48 |
| 封裝： | 14 X 14 MM, HEAT SINK, QFP-48 |
| 文件頁數(shù)： | 1/43頁 |
| 文件大?。?/td> | 786K |
| 代理商： | KA3120 |
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HDD PRODUCTS
KA3120
1
PRELIMINARY
MIC-99D001
January 1999
SPINDLE & VOICE COIL MOTOR ONE CHIP DRIVER
The KA3120 is an ASIC combination chip, which was
designed for the HDD, includes the following functions:
spindle motor drive, voice coil motor drive, retract and
power management.
To drive and control the spindle, the digital ASIC provides
the appropriate control signals (Start up, commutation,
speed control) to the KA3120. The spindle motor condition
is monitored by the FG output and the motor speed control
is accomplished via the PWMSP input. The ASIC controls
the voice coil motor current via PWMH and PWML inputs
and the power management circuit always monitors the
power supply voltages.
FEATURES
SPINDLE MOTOR DRIVE PART
Soft switching
Spindle brake after retract
Adjustable brake delay time
2.0A max. current power driver
Low output saturation voltage: 1V typical @1.6A
PWM decoder & filter for soft switching
The digital circuit (ASIC) based start-up, commutation and motor speed control
VOICE COIL MOTOR DRIVE PART
Trimmed low offset current
1.2A max. current power driver
Gain selection and adjustable gain
Automatic power down retract function
Class AB linear amplifier with no dead zone
Low output saturation voltage: 0.8V typical @1.0A
Internal full bridge with VPNP (Vertical PNP) & NPN
VCM offset monitoring
48-QFPH-1414
ORDERING INFORMATION
Device
Package
Operating Temperature
KA3120
48-QFPH-1414
0 ~ 70
°
C
Rev. B
1999 Fairchild Semiconductor Corporation
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