Title :
A head actuator driver IC for hard-disk drives
Author_Institution :
Nat. Semicond. Corp., Santa Clara, CA, USA
Abstract :
A head-actuator IC for high-performance 12-V hard-disk drives that features a rail-to-rail 2A Class AB H-bridge using four on-chip 0.25- Omega lateral DMOS power transistors is described. An error amplifier and a low-loss current-sense amplifier that does not use sense resistors are also integrated to configure the IC as a transconductance amplifier. The IC uses a junction-isolated, dual-layer-metal, single-poly process, containing bipolar, CMOS, and DMOS transistors. Typical specs of IC are listed. Performance is comparable to that of multi-chip solutions.<>
Keywords :
BiCMOS integrated circuits; bridge circuits; driver circuits; electric actuators; hard discs; magnetic heads; power integrated circuits; 0.25 micron; 12 V; CMOS transistors; Class AB H-bridge; bipolar transistors; dual-layer-metal; error amplifier; hard-disk drives; head actuator driver IC; junction-isolated; lateral DMOS power transistors; low-loss current-sense amplifier; single-poly process; transconductance amplifier; Actuators; Charge pumps; Coils; Hard disks; Magnetic heads; Mirrors; Power transistors; Rail to rail outputs; Resistors; Transconductance;
Conference_Titel :
Solid-State Circuits Conference, 1993. Digest of Technical Papers. 40th ISSCC., 1993 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0987-1
DOI :
10.1109/ISSCC.1993.280039
