KA2811C Datasheet, PDF (1/28 Pages) Fairchild Semiconductor – 12V Spindle Motor and Voice Coil Motor Driver

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KA2811C
12V Spindle Motor and Voice Coil Motor Driver
Features
SMP Circuit
• 3 phase sensorless BLDC motor driver with speed
discriminator
• Built-in start-up circuit with WSS (Waltz step start)
method
• Suitable for high and middle end set
(Max. output current: 2A)
• Built-in dynamic brake circuit
Vcm Circuit
• High output current driver with external NPN
& PNP transistors. (Max. output current: 2A)
• No crossover distortion
• Low offset current
Other
• Low standby current
• Built-in precision power detector circuit
• Built-in TSD(Thermal Shut Down) circuit
Description
The KA2811C is a monolithic one-chip IC which includes
SPM (Spindle motor) driver, VCM (Voice coil motor) driver
and peripheral driver, designed for driving HDD motor. For
high starting torque and high speed, SPM circuit employes
WSS (Waltz step start) method for starting the motor and can
drive up to 2A. VCM circuit is designed to drive up to 1.5A
to meet the trends of HDD'S high speed. (Requires external
transistors).
48-QFPH-1414
Typical Applications
• Hard disk drive(HDD)
Ordering Information
Device
Package Operating Temperature
KA2811C 48-QFPH-1414
0 ~ 70°C
©2000 Fairchild Semiconductor International
1
Rev.1.0.1
May. 2000.