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| ICs for Motor AN8481SB Spindle motor driver IC for optical disk s Overview The AN8481SB 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. 18.40.2 (5.15) (4.8) 28 22 21 15 (1.315) 8.30.2 0.30 -0.05 +0.10 Unit: mm s Features * Adopting the 3-phase full-wave soft switch system * With switching regulator control function * With start and stop pin * Reverse breaking by EC/ECR voltage * With Hall bias pin * Surface-mount small package 10.930.30 0 to 10 1 7 8 14 0.650.20 2.70.2 (1.2) 0.8 (6.4) 0.35 -0.05 +0.10 Seating plane s Applications * High speed CD-ROM drive * PD, DVD, CD-R, CD-RW drives HSOP042-P-0400 0.10.1 1 AN8481SB s Block Diagram CS1 VM FG ICs for Motor 20 22 27 26 25 9 FG comparator REF 21 Thermal protection circuit VTL 13 VCC PCI VREG Lower 19 side VCE detection Amp. Amp. Upper side distribution Lower side distribution PCS SWB 18 Direction changeover 17 Amp. Direction detection 16 ER Logic EP = ER x EA Start/stop Absolute value 28 PG A1 A2 A3 12 SWG Triangular wave Detection Hall bias Hall amp. matrix EA 8 S/S 15 11 EC FC VH s Pin Descriptions Pin No. Symbol 1 2 3 4 5 6 7 8 9 10 2 H1+ H1- H2+ H2- H3+ H3- VH SS FG ECR Description Hall element-1 positive input pin Hall element-1 negative input pin Hall element-2 positive input pin Hall element-2 negative input pin Hall element-3 positive input pin Hall element-3 negative input pin Hall bias pin Start/stop changeover pin FG signal output pin Torque command reference input pin Pin No. Symbol 11 12 13 14 15 16 17 18 19 20 EC PCI VCC SG FC SWG SWB PCS VREG VM Description Torque command input pin Current feedback phase compensation pin Supply voltage pin Signal GND pin Triangular wave oscillation pin SW-REG system GND pin SW-REG driving pin SW-REG system phase compensation pin Fixed power supply pin Motor supply voltage pin ECR H1+ H1- H2+ H2- H3+ H3- 10 GND 14 1 2 3 4 5 6 7 ICs for Motor s Pin Descriptions (continued) Pin No. Symbol 21 22 23 24 REF CS1 N.C. N.C. Description SW-REG reference setting pin Current det. pin 1 N.C. N.C. Pin No. Symbol 25 26 27 28 A3 A2 A1 PG AN8481SB Description Drive output 3 Drive output 2 Drive output 1 Power GND pin s Absolute Maximum Ratings Parameter Supply voltage Symbol VCC VM VREG Control signal input voltage Supply current Output current *3 *4 Rating 7.0 14.4 Unit V V(n) ICC IO(n) IHB 0 to VCC 30 1 200 50 667 -20 to +70 -55 to +150 V mA mA mA mW C C Hall bias current Power dissipation *2 *1 PD Topr Tstg *1 Operating ambient temperature Storage temperature Note) Do not apply external currents or voltages to any pins not specifically mentioned. For circuit currents, '+' denotes current flowing into the IC, and '-' denotes current flowing out of the IC. *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2: For 70C and IC alone. *3: n = 22, 25, 26, 27, 28 *4: n = 1, 2, 3, 4, 5, 6, 8, 10, 11 s Recommended Operating Range Parameter Supply voltage Symbol VCC VM VREG Range 4.25 to 5.5 4.5 to 14 Unit V s Electrical Characteristics at Ta = 25C Parameter Overall Circuit current 1 Circuit current 2 Start/stop Start voltage Stop voltage VSTART VSTOP Voltage with which a circuit operates at VCC = 5 V and L H Voltage with which a circuit becomes off at VCC = 5 V and H L 3.5 1.0 V V ICC1 ICC2 VCC = 5 V in power save mode VCC = 5 V, IO = 0 mA 0 8 0.1 16 mA mA Symbol Conditions Min Typ Max Unit 3 AN8481SB s Electrical Characteristics at Ta = 25C (continued) Parameter Hall bias Hall bias voltage Hall amplifier Input bias current In-phase input voltage range Minimum input level Torque command In-phase input voltage range Offset voltage Dead zone Input current Input/output gain Output High-level output saturation voltage Low-level output saturation voltage Torque limit current FG FG output high-level FG output low-level In-phase input voltage range FG hysteresis width Triangular wave oscillation circuit Charging current Discharging current ICH IDCH VCC = 5 V, FC = 0.5 V VCC = 5 V, FC = 2.5 V VCC = 5 V VCC = 5 V -100 25 FGH FGL VFGR HFG VCC = 5 V, IFG = - 0.01 mA VCC = 5 V, IFG = 0.01 mA VCC = 5 V, Input D-range at H2+, H2- VCC = 5 V 3.0 1.5 1 VOH VOL ITL VCC = 5 V, IO = -300 mA VCC = 5 V, IO = 300 mA VCC = 5 V, RCS = 0.5 390 EC ECOF ECDZ ECIN ACS VCC = 5 V VCC = 5 V VCC = 5 V VCC = 5 V, EC = ECR = 2.5 V VDD = 5 V, RCS = 0.5 1 -150 50 -5 0.31 0 IBH VHBR VINH VCC = 5 V VCC = 5 V VCC = 5 V 1.5 60 1 VHB VCC = 5 V, IHB = 20 mA 0.7 Symbol Conditions Min ICs for Motor Typ Max Unit 1.2 1.6 V A V mV[p-p] 5 4.0 3.9 150 150 0.51 V mV mV A A/V 100 -1 0.41 0.9 0.2 530 1.6 0.6 670 V V mA VCC 0.5 3.0 20 -25 100 V V V mV A A 10 -50 50 Lower side voltage detection circuit Input to output gain SW-REG driving circuit PNP driving current * Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. GV1 5 10 20 times ISWB 10 50 mA Parameter Thermal protection Thermal protection operating temperature Thermal protection hysteresis width Symbol Conditions VCC = 5 V, EC = 100 mV VCC = 5 V, EC = 100 mV Min Typ Max Unit C C TSDON TSD 170 45 4 ICs for Motor s Usage Notes AN8481SB Prevent this IC from being line-to-ground fault. (To be concrete, do not short-circuit any of pins A1 (pin 27), A2 (pin 26) and A3 (pin 25) to VREG pin (pin 19) or VM pin (pin 20).) s Application Notes * PD Ta curves of HSOP042-P-0400 PD T a 2 400 2 232 2 200 2 000 Mounted on standard board (glass epoxy: 75 x 75 x t1.6 mm3) Rth(j-a) = 56C/W PD = 2 232 mW (25C) Power dissipation PD (mW) 1 800 1 600 1 400 1 200 1 042 1 000 800 600 400 200 0 0 25 50 Independent IC without a heat sink Rth( j-a) = 120C/W PD = 1 042 mW (25C) 75 100 125 150 Ambient temperature Ta (C) * Phase conditions between Hall input and output current Phase of Hall pin H1+ A B C D E F H H M L L M H1 H3+ L M H H M L H3 H2 H1 H2 H2+ M L L M H H H3 0 ECR EC A3 Emit Output current 0 Sink A B C D E F A2 A1 A2 A3 A1 0 5 AN8481SB s Application Circuit Example 0.1 F RCS = 0.5 22 CS1 20 VM 28 PG 26 A2 25 A3 27 A1 9 FG ICs for Motor 100 F 68 H 21 FG comparator REF 19 VREG 1 F 18 SWB 17 200 1 k 12 V SWG 16 Lower side VCE detection Amp. Amp. VTL Thermal protection circuit 13 VCC VCC = 5V 12 PCI Upper side distribution Lower side distribution PCS Direction changeover Amp. Direction detection ER Logic EP = ER x EA Start/stop Absolute value 0.1 F Triangular wave Detection Hall bias Hall amp. matrix EA 8 S/S System control High: Start ECR 10 GND 14 2 700 pF 15 FC H1+ 1 H1- 2 H2+ 3 H2- 4 H3+ 5 H3- 6 EC 11 Servo-torque command VH 7 6 |
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