TA8490F

This 3-phase, full-wave, brushless DC motor driver IC has been developed for use in CD-ROM drive spindle motors. The multi-chip structure of this device facilitates dispersion of the heat generated inside the package, making it possible to suppress heat concentration. The TA8490F contains in its upper stage a discrete power transistor which, thanks to its low-saturation characteristic, enables the IC to provide superior thermal efficiency.

The features of TA8490F can be summarized as (1)multi-chip structure (3 RN6006 chips built-in); (2)3-phase, full-wave, semi-linear drive; (3)current drive/current control; (4)built-in current limiter: ILIM=0.6A (at RF:=0.3); (5)built-in reversing brake/short brake functions; (6)FG signal output (using hall element output signal); (7)built-in switching regulator controller; (8)built-in hall bias; (9)built-in thermal shutdown circuit; (10)package: MFP-30:

The absolute maximum ratings of TA8490F are (1)power supply voltage VCC/VM: 7/16V; (2)output current: 1.2 A; (3)power dissipation PD (Note 1: unmounted): 1.0W; (4)junction temperature Tj: 150°C; (5)operating temperature Topr: -20~75°C; (6)storage temperature Tstg: -55~ 150°C.