AN8470NSA

ICs for Compact Disc/CD-ROM Player AN8470NSA Spindle motor driver IC for optical disk s Overview The AN8470NSA is a high performance IC suited for driving a spindle motor of an optical disk such as CD-ROM, PD, DVD, CD-R, CD-RW, etc. 32 11.0±0.3 17 Unit: mm 6.1±0.3 s Features Low power consumption due to a direct PWM system With start and stop pin Reverse breaking by EC/ECR voltage With Hall bias pin Surface-mount small package 8.1±0.3 0.65±0.10 1 16 0.2–0.05 1.5±0.2 +0.10 (0.625) 0.65 0.3 –0.05 +0.10 s Applications High speed CD-ROM drive PD, DVD, CD-R, CD-RW drives Seating plane 0.65±0.10 0.1±0.1 (0.5) SSOP032-P-0300 VPUMP s Block Diagram VDD BC4 BC3 BC2 BC1 9 11 12 13 14 15 Start FG 7 24 Start/stop Step-up voltage circuit OSC H1H H1L H2H H2L H3H H3L VH 23 22 21 19 18 Amp. 17 8 Hall bias Hall amp. matrix Distributor circuit Amp. Output circuit 6 Thermal protection VM1 32 VM2 3 1 31 A1 A2 A3 PWMOUT 2 30 RNF2 RNF1 EC ECR 27 VT 26 SRESET FF PNFOUT ×5 10 GND FC 25 Oscillator VCL SSET 1 AN8470NSA s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol A2 RNF2 A1 N.C. N.C. VM1 Start VH VDD GND BC4 BC3 BC2 BC1 VPUMP N.C. Description Drive output 2 Current det. pin 2 Drive output 1 N.C. N.C. Motor supply voltage pin 1 Start/stop changeover pin Hall bias pin Supply voltage pin Ground pin Booster capacitor connection pin 4 Booster capacitor connection pin 3 Booster capacitor connection pin 2 Booster capaci...