TA8493BF

TA8493F/AF/BF Toshiba Bipolar Linear Integrated Circuit Multi-Chip TA8493F, TA8493AF, TA8493BF 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 Weight: 0.63 g (typ.) 1 2002-01-31 TA8493F/AF/BF Block Diagram VCC 5V La (G) 20 VCC 2 Lb (G) 1 Lc (G) 27 29 Amplifier 4 VM1 12 V Ha + - 15 14 Matrix 13 Ha + Hb 12 Hb 16 + Hc - 17 Hc VM2 3 30 28 La Lb Lc RF1 RF2 Reverse Detection TSD 6 25 GND FGO 10 HB 18 PWM Signal VC 21 Vref 22 F/F OSC Mode Select MS 26 OSC 23 Short Brake BRK 11 24 GND1 7 GND2 2SJ465 ´ 3 9 pin: N.C. Stand by 19 Cd 5 SB 8 CRF 2 2002-01-31 TA8493F/AF/BF PIN Assignment Termina...