3-Phase Full Wave Brushless DC Motor Driver IC for CD-ROM Drives

These 3-phase, full-wave, brushless DC motor driver ICs have been developed for use in CD-ROM drive spindle motors. The TA8493F/ AF/ BF contain in its upper stage a discrete power transistor (P-ch-MOS) and uses direct PWM control system, which enables the IC to provide superior thermal efficiency.
Furthermore, the multi-chip structure of this device facilitates dispersion of the heat generated inside the package, making it possible to suppress heat concentration.

FEATUREs
• Multi-chip structure (3 × 2SJ465 chips built-in)
• Direct PWM control system
• Drive system: 120° drive system (TA8493F/BF)
                       : 180° drive system (TA8493AF)
• Built-in current limiter: ILIM = 0.7 A (typ.) (at RF = 0.33 Ω)
• Built-in reversing brake/short brake functions
• FG signal output (using hall element output signal)
• Built-in hall bias
• Built-in thermal shutdown circuit
• Package: MFP-30