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| 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. 18.40.2 (5.15) (4.8) 28 22 21 15 (1.315) 10.930.30 8.30.2 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 0.650.20 2.70.2 (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 0.10.1 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 x 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-3 negative input pin Start/stop changeover pin Thermal protection monitor pin FG signal output pin Brake mode setting pin N.C. ICs for Compact Disc/CD-ROM Player Pin No. Symbol 15 16 17 18 19 20 21 22 23 24 25 26 27 28 SG VCC ECR EC N.C. PCI VM CS N.C. N.C. N.C. A3 A2 A1 Description Signal GND pin Supply voltage pin Torque command reference input pin Torque command input pin N.C. Current feedback phase compensation pin Motor supply voltage pin Current det. pin 1 N.C. N.C. N.C. Drive output 3 Drive output 2 Drive output 1 s Absolute Maximum Ratings Parameter Supply voltage *4 Symbol VCC VM Rating 7.0 14.4 0 to VCC 30 1 200 50 667 -20 to +70 -55 to +150 Unit V Control signal input voltage Supply current Output current *3 V(n) ICC IO(n) IHB 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 = 1, 22, 26, 27, 28 *4: n = 2, 3, 5, 6, 8, 9, 10, 13, 17, 18 s Recommended Operating Range Parameter Supply voltage Symbol VCC VM Range 4.25 to 5.5 4.5 to 14 Unit V 2 ICs for Compact Disc/CD-ROM Player s Electrical Characteristics at Ta = 25C Parameter Overall Circuit current 1 Circuit current 2 Start/stop Start voltage Stop voltage Medium voltage 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 Brake cirrcuit Short brake model level Reverse rotation brake mode level Short brake start level Short brake current VSBR VRBR VSBRL ISBR VCC = 5 V VCC = 5 V VCC = 5 V, ECR = 1.65 V VCC = 5 V 3.5 1.65 12 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 10 VOH VOL ITL VCC = 5 V, IO = -300 mA VCC = 5 V, IO = 300 mA VCC = 5 V, RCS = 0.5 400 EC ECOF ECDZ ECIN ACS VCC = 5 V VCC = 5 V VCC = 5 V VCC = 5 V, EC = ECR = 1.65 V VCC = 5 V, RCS = 0.5 0.5 -100 25 -5 0.75 0 75 -1 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 VSTART VSTOP VMED 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 Voltage with which VPC1 becomes low at VCC = 5 V and EC = 0 V 2.7 1.55 ICC1 ICC2 VCC = 5 V in power save mode VCC = 5 V, IO = 0 mA 1 0 8 Symbol Conditions Min AN8480NSB Typ Max Unit 0.1 16 0.7 1.75 mA mA V V V 1.2 1.6 V A V mV[p-p] 5 4.0 3.9 100 125 1.25 V mV mV A A/V 1.0 0.9 0.2 500 1.6 0.6 600 V V mA VCC 0.5 3.0 20 V V V mV 1.0 V V V mA 1.74 35 3 AN8480NSB ICs for Compact Disc/CD-ROM Player s Electrical Characteristics at Ta = 25C (continued) * Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Parameter Thermal protection Thermal protection operating temperature Thermal protection hysteresis width Thermal protection flag Level at thermal protection = on Level at thermal protection = off Symbol Conditions VCC = 5 V, EC = 100 mV VCC = 5 V, EC = 100 mV VCC = 5 V VCC = 5 V Min 3.0 Typ Max Unit C C TSDON TSD 160 45 VTSDON VTSDOFF 0.5 V V s Usage Notes Prevent this IC from being line-to-ground fault. (To be concrete, do not short-circuit any of A1 (pin 28), A2 (pin 27) and A3 (pin 26) with VM pin (pin 21).) s Application Notes * PD Ta curves of HSOP042-P-0400 PD T a 2.500 2.240 2.000 Power dissipation PD (W) Mounted on standard board (glass epoxy: 75 x 75 x t1.6 mm3) Rth(j-a) = 55.8C/W 1.500 1.042 1.000 Independent IC without a heat sink Rth(j-a) = 119.9C/W 0.500 0.000 0 25 50 75 100 125 150 Ambient temperature Ta (C) 4 ICs for Compact Disc/CD-ROM Player s Application Notes (continued) * Phase conditions between Hall input and output current AN8480NSB 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 * Power consumption calculation method You can find a rough value of electric power to be consumed in the IC in the following method and the use of EXCEL (computer soft ware) will enable you to put it on a graph. Calculating formula: 1. Let an induced voltage generated in each phase as below: (Reference to a motor center point) EA1 = EO x sin (X) * * * (1) EA2 = EO x sin (X+120) * * * (2) EA3 = EO x sin (X+240) * * * (3) X: Phase angle 2. Let a current flowing in each phase as below: IA1 = IO x sin (X) * * * (4) IA2 = IO x sin (X+120) * * * (5) IA3 = IO x sin (X+240) * * * (6) 3. The voltages generated by a wire-wound resistance of a motor are: VR2 = IA2 x R * * * (8) VR3 = IA3 x R * * * (9) VR1 = IA1 x R * * * (7) 4. In each phase, add the voltage generated by an induced voltage and that by a wire-wound resistance. VA2' = (2) + (5) VA3' = (3) + (6) VA1' = (1) + (4) 5. As the lowest voltage in each phase angle must be 0 V, you can get the voltage to be generated in each phase by means of subtracting the lowest voltage from the voltage of the remaining two phases. VA1 = VA1' - MIN (VA1', VA2', VA3') * * * (10) VA2 = VA2' - MIN (VA1', VA2', VA3') * * * (11) VA3 = VA3' - MIN (VA1', VA2', VA3') * * * (12) 6. Subtract the supply voltage from each phase's voltage found in item 5 and then multiply it by each phase's current, so that you can get the power consumption. P = (12 - VAn ) x IAn n=1 3 5 AN8480NSB s Application Notes (continued) ICs for Compact Disc/CD-ROM Player * Theory of thermal resistance A chip temperature or the fin temperature can be understood in the same way as Ohm's Law. Tj Rj-c P Rf Ta Rc-a Tj : Chip temperature Ta : Ambient temperature P : Electric power generated by IC Rj-c : Thermal resistance between a chip and a package Rc-a: Thermal resistance between a package and a surface of a heat sink or free air Rf : Thermal resistance between a package and surface of a heat sink Tj = Ta + P x (Rj-c + Rc-a // Rf) Make sure that Tj does not exceed 150C. If it exceeds 150C, you can suppress the rise of a chip temperature by adding a heat sink which is equivalent to Rf in the above figure. Tj = Ta + P x (Rj-c + Rc-a // Rf) A package surface and the fin are available for a temperature measurement. But the fin part is recommendable for measurement because a package surface measurement does not always promise you a consistent measuring result. s Application Circuit Example 15 SG VM = 12 V 21 VM H1+ 2 H1- 3 H2+ 5 H2- 6 H3+ 8 H3- 9 VH 7 Detection Upper side distribution 22 CS1 RCS = 0.5 Amp. Hall amp. matrix Direction detection Direction changeover Lower side distribution Amp. 28 A1 27 A2 26 A3 Hall bias EA ER Logic EP = ER x EA 1 PG Absolute value VTL 12 FG FG comparator Thermal protection circuit PCI 20 Servo EC 18 torque command 17 ECR FG signal Start/stop 10 VCC 16 Brake circuit 13 11 TSDF High: Start Medium: FG is on. Low: Stop VCC = 5 V 6 S/S 0.1 F Low: TSD on High: TSD off Low: Short brake High: Reverce rotation brake BRK |
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