A8983CJT

8983 SPINDLE & VOICE-COIL ACTUATION MANAGER/DRIVER 8983 SPINDLE & VOICE-COIL ACTUATION MANAGER/DRIVER The A8983CJT provides for complete spindle and voice coil power electronics for small form-factor HDDs (hard disk drives). The largescale integration and use of advanced DABiC (digital/analog-BiCMOS) merged technologies result in minimum power dissipation, minimum operating voltage, and minimum external components. Data Sheet 26310.10 ABSOLUTE MAXIMUM RATINGS at TA = +25°C Load Supply Voltage, VCC(PWR) ............ 7.0 V Spindle Output Current, IOUT(S) .......... ±1.6 A Voice-Coil Output Current, IOUT(A) ...... ±0.9 A Logic Supply Voltage VCC(D) ................ 6.0 V Operating Temperature Range, TA ...................................... 0 °C to +70°C Output current rating may be restricted to a value determined by system concerns and factors. These include: system duty cycle and timing, ambient temperature, and use of any heatsinking and/or forced cooling. T C U Y D L O N R O P E D C E N U E N ER I T F N E O R C S OR I D F — The spindle driver system incorporates a three-phase MOS power driver and a back-EMF sensing motor commutation scheme. A patented circuit eliminates the need for an external current-sense resistor, achieving additional headroom. Intrinsic ground clamp and flyback diodes are also provided. The voice-coil system incorporates a MOS H-bridge driver, sense amplifier, error amplifier, and programmable retract circuitry. Dwg. PP-060 The spindle and voice-...