Title :
A full CMOS adaptive 3.3V/5V supply VCM/spindle controller with 9mA total current consumption in lock mode for high TPI and RPM of 8200 for 1" micro-drive, 1.8" drive, and 2.5" drive
Author :
Bathaee, M. ; Andrian-Albescu, C. ; Nicolae, D. ; Moustoufi, Zed ; Ghezel, Humid
Abstract :
The spindle VCM (voice coil motor) single chip is a full CMOS monolithic device that integrates spindle and VCM controllers as well as power stages into one chip. The device operates from a 3.3 V or 5 V power supply. The chip is designed for a small-form-factor hard disk drive application. A precision low voltage detection circuit monitors the power supply and initiates a VCM retract at voltage fault conditions. A 3-line serial port interface with read-back capability provides an interface to the microprocessor. The spindle driver features a transconductance amplifier, current sense amplifier, power output drivers, sequencer, internal delay/masking logic, spindle brake circuit, FLL, and charge pump for locking the spindle to the programmed rotational speed.
Keywords :
CMOS integrated circuits; amplifiers; controllers; detector circuits; disc drives; driver circuits; frequency locked loops; hard discs; integrated circuit design; integrated circuit measurement; logic circuits; motor drives; peripheral interfaces; 1 in; 1.8 in; 2.5 in; 3.3 V; 5 V; 9 mA; CMOS supply-adaptive voice coil motor/spindle controllers; FLL; charge pumps; controller supply voltage; current sense amplifiers; hard disk drive size; high TPI/RPM drives; internal delay/masking logic; lock mode current consumption; microdrives; microprocessor interfaces; power output drivers; power supply monitoring circuits; precision low voltage detection circuits; programmed rotational speed spindle locking; read-back capability multi-line serial port interfaces; sequencers; small-form-factor hard disk drive applications; spindle VCM single chips; spindle brake circuits; spindle drivers; transconductance amplifiers; voice coil motor controllers; voltage fault condition VCM retract; Adaptive control; Coils; Driver circuits; Electrical fault detection; Hard disks; Laser mode locking; Low voltage; Power amplifiers; Power supplies; Programmable control;
Conference_Titel :
Electronics, Circuits and Systems, 2002. 9th International Conference on
Print_ISBN :
0-7803-7596-3
DOI :
10.1109/ICECS.2002.1046188
