AN8480NSB

ICs for Compact Disc/CD-ROM Player AN8480NSB 3-phase full-wave motor driver IC s Overview The AN8480NSB is a 3-phase full-wave motor driver IC with a reverse rotation brake/short brake changeover function, incorporating a thermal protection circuit with its protection monitor pin. 18.4±0.2 (5.15) (4.8) 28 22 21 15 (1.315) 10.93±0.30 8.3±0.2 0.30 –0.05 +0.10 Unit: mm s Features 3-phase full-wave and snubberless FG output Current limit Reverse rotation prevention Thermal protection circuit built-in (with thermal protection monitor pin) 1 7 8 14 0° to 10° 0.65±0.20 2.7±0.2 (1.2) (6.4) 0.8 0.35 –0.05 +0.10 s Applications Various types of optical disk drive Seating plane HSOP042-P-0400 s Block Diagram SG 15 0.1±0.1 21 H1+ H1− H2+ H2− H3+ H3− VH 2 3 5 6 8 9 7 Hall bias EA Absolute value VTL Start/stop 10 16 20 Detection Upper side distribution VM CS1 22 Amp. Hall amp. matrix Direction detection Direction changeover Lower side distribution Amp. 28 27 26 A1 A2 A3 ER Logic EP = ER × ΕΑ 1 EC ECR 18 17 PG 12 FG FG comparator Thermal protection circuit Brake circuit 13 11 TSDF PCI BRK VCC S/S 1 AN8480NSB s Pin Descriptions Pin No. Symbol 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PG H1+ H1− N.C. H2+ H2− VH H3+ H3− SS TFLG FG BRK N.C. Description Power GND pin Hall element-1 positive input pin Hall element-1 negative input pin N.C. Hall element-2 positive input pin Hall element-2 negative input pin Hall bias pin Hall element-3 positive input pin Hall element...