ICs for Compact Disc/ CD-ROM Player AN8488SB 3-phase full-wave motor driver and DC motor BTL driver IC ■ Overview Unit: mm 18.4±0.2 (10.00) (1.95) 34 30 22 (1.315) 1 • 3-phase full-wave and snubberless • FG output • Current limit • Reverse rotation prevention • Thermal protection circuit built-in 9 13 21 0.1±0.1 ■ Features 0° to 10° 0.5±0.2 2.7±0.2 (4.00) 8.3±0.2 10.93±0.30 +0.10 42 0.30 – 0.05 The AN8488SB is a motor driver IC incorporating a 3-phase full-wave motor driver and DC motor BTL driver IC with a reverse rotation brake/short brake changeover function. It is encapsulated into a high allowable power dissipation package (with copper block). (3.20) +0.10 0.80 (1.20) 0.35 – 0.05 Seating plane HSOP042-P-0400C ■ Applications • Various types of optical disk drive Upper side distribution 17 18 Lower side distribution H3+ 20 Amp. Lower side power VCC2 10 VP 7 VN 4 VM2 VCC2 det. Direction detection Detection Hall bias Reset ER Logic VREF 1 VM2 2 EP = ER × EA det. EA 27 Absolute value ECR 26 VTL 12 VREF 5 PC 11 SLIN 2 PG2 1 PG1 VCC1 22 25 S/S FG Brake comparator circuit 14 Thermal protection circuit Start/stop FG EC Upper side power BRK 15 H3− 21 23 VH Amp. Direction changeover Hall amp. H2− 19 matrix H2+ 28 H1− 16 PCI H1+ 9 FIN1 SG 29 VM1 34 CS 36 A1 35 A2 32 A3 ■ Block Diagram 1 AN8488SB ICs for Compact Disc/ CD-ROM Player ■ Pin Descriptions Pin No. Symbol Description Pin No. Symbol Description 1 PG1 SPD block power GND pin 19 H2− Hall element-2 negative input pin 2 PG2 Driver block power GND pin 20 H3+ Hall element-3 positive input pin 3 N.C. N.C. 21 H3− Hall element-3 negative input pin 4 VN Driver block inverted output pin 22 VCC1 SPD block supply voltage pin 5 PC Driver block power cut pin 23 VH Hall bias pin 6 N.C. N.C. 24 N.C. N.C. 7 VP Driver block forward output pin 25 SS 8 N.C. N.C. 26 ECR 9 VM2 Driver block motor power supply pin 27 EC Torque command input pin 10 VCC2 Driver block supply voltage pin 28 PCI Current feedback phase compensation pin 11 SLIN Driver block input pin 29 VM1 SPD block motor supply voltage pin 12 VREF Driver block reference input pin 30 N.C. N.C. 13 N.C. N.C. 31 N.C. N.C. 14 FG FG signal output pin 32 A3 15 BRK Brake mode setting pin 33 N.C. 16 H1+ Hall element-1 positive input pin 34 CS Current det. pin 17 H1− Hall element-1 negative input pin 35 A2 A2 phase output pin 18 H2+ Hall element-2 positive input pin 36 A1 A1 phase output pin FIN1 SG Signal GND pin Start/stop changeover pin Torque command reference input pin A3 phase output pin N.C. FIN2 ■ Absolute Maximum Ratings Parameter Supply voltage Symbol Rating Unit VCC1 7.0 V VCC2 14.0 VM1 , VM2 Output voltage 1 *4 Output voltage 2 *5 Control signal input voltage *4 Supply current Output current *3 Hall bias current Power dissipation *2 Operating ambient temperature Storage temperature *1 *1 VO1(n) − 0.3 to VM1 + 0.4 V VO2(n) − 0.3 to VM2 + 0.4 V V(n) 0 to VCC1 V ICC1 30 mA IO(n) ±1 200 mA IHB 50 mA PD 786 mW Topr −20 to +75 °C Tstg −55 to +150 °C 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 = 25°C. *2: The power dissipation shown is the value of independent IC without a heat sink at Ta = 75°C. Refer to the PD Ta curves of the "■ Application Notes" for details. 2 ICs for Compact Disc/ CD-ROM Player AN8488SB ■ Absolute Maximum Ratings (continued) Note) *3: n = 4, 7, 32, 35, 36 *4: n = 32, 35, 36 *5: n = 4, 7 *6: n = 5, 11, 12, 15, 25, 26, 27 ■ Recommended Operating Range Parameter Supply voltage Symbol Range Unit VCC1 4.25 to 5.5 V VCC2 4.5 to 13.5 VM1 , VM2 ■ Electrical Characteristics at Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Overall Circuit current 1 ICC1 VCC1 = 5 V, SS: at low 0 0.1 mA Circuit current 2 ICC2 VCC2 = 12 V, SS: at low 60 200 µA Start/stop Start voltage VSTART Voltage with which a circuit operates at VCC1 = 5 V and L → H 2.7 V Stop voltage VSTOP Voltage with which a circuit becomes off at VCC1 = 5 V and H → L 0.7 V Medium voltage VMED Voltage with which VPC1 becomes low at VCC1 = 5 V and EC = 0 V 1.425 1.65 1.89 V VHB VCC1 = 5 V, IHB = 20 mA 0.7 1.2 1.6 V IBH VCC1 = 5 V 1 5 µA In-phase input voltage range VHBR VCC1 = 5 V 1.5 4.0 V Minimum input level VINH VCC1 = 5 V 60 mV[p-p] EC VCC1 = 5 V 0.5 3.9 V Offset voltage ECOF VCC1 = 5 V −100 0 100 mV Dead zone ECDZ VCC1 = 5 V 25 75 125 mV Input current ECIN VCC1 = 5 V, EC = ECR = 1.65 V −5 − 0.25 µA Input/output gain ACS VCC1 = 5 V, RCS = 0.6 Ω 0.75 1.0 1.25 A/V High-level output saturation voltage VOH VCC1 = 5 V, IO = −300 mA 0.9 1.6 V Low-level output saturation voltage VOL VCC1 = 5 V, IO = 300 mA 0.2 0.6 V Torque limit current ITL VCC = 5 V, RCS = 0.6 Ω 400 500 600 mA <Spindle block> Hall bias Hall bias voltage Hall amplifier Input bias current Torque command In-phase input voltage range Output 3 AN8488SB ICs for Compact Disc/ CD-ROM Player ■ Electrical Characteristics at Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit <Spindle block> (continued) FG FG output high-level FGH VCC1 = 5 V, IFG = − 0.01 mA 3.0 VCC1 V FG output low-level FGL VCC1 = 5 V, IFG = 0.01 mA 0.5 V In-phase input voltage range VFGR VCC1 = 5 V, Input D-range at H2+, H2− 1.5 3.0 V FG hysteresis width HFG VCC1 = 5 V 1 10 20 mV Short brake model level VSBR VCC1 = 5 V 1.0 V Reverse rotation brake mode level VRBR VCC1 = 5 V 3.5 V Short brake start level VSBRL VCC1 = 5 V, ECR = 1.65 V 1.65 1.74 V 60 90 mA Brake cirrcuit Short brake current ISBR VCC1 = 5 V <Driver block> Driver RL = 16 Ω VDROF SL IN = 1.65 V −150 0 +150 mV + gain GSL+ R IN = 10 kΩ 21 23 25 dB +/− relative gain GSL − 0.7 0 +0.7 dB Output D range '+' VO+ SL IN = 3.3 V 9.3 10.0 V Output D range '−' VO− SL IN = 0 V −10.0 −9.3 V High-level PC threshold voltage VPCH VCC2 = 12 V 2.9 V Low-level PC threshold voltage VPCL VCC2 = 12 V 1.0 V VCC2 = 12 V, PC = 5 V 100 200 µA VRST 4.5 V VR 1.35 Output offset voltage Power cut operation PC input current IPC Reset cirrcuit Reset operation release supply voltage VREF detection voltage • Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Parameter Symbol Conditions Min Typ Max Unit Thermal protection Thermal protection operating temperature TSDON VCC1 = 5 V 160 °C Thermal protection hysteresis width ∆TSD VCC1 = 5 V 45 °C 0.2 V Sled block supply voltage Sled block supply voltage detection hysteresis width 4 ∆VHD ICs for Compact Disc/ CD-ROM Player AN8488SB ■ Usage Notes 1. Use the VCC2 at VCC2 ≥ VM2 . And use power supply always at on state. Otherwise it will cause malfunction. 2. On driver gain setting of driver block. Voltage gain of power amplifier: 23 dB 10 kΩ 500 Ω 10 kΩ 11 Input ×7 4 ×7 7 M Load Input pin 5.5 kΩ Power amp. Output pin VREF VREF 3. On operation mode of mute: PC Driver output H L (Open) Active Mute 4. On SS pin mode: SS H M L (Open) Spindle block On Off Off Driver block On On Off 5. On brake mode of spindle block: BRK H L (Open) EC < ECR Acceleration Acceleration EC > ECR Reverse rotation brake Short brake 6. Take time to check the characteristics on use. When changing an external circuit constant for use, consider not only static characteristics, but also transient characteristics and external parts with respect to the characteristics difference among ICs so that you can get enough margin. 7. Avoid short-circuit between output pin and power supply, output pin and GND (line-to-supply and line-to-ground fault) and output pins (load short-circuit). Otherwise the IC will be damaged and is likely to get fired. 8. Be cautious on a dip soldering. Prior study is required. 5 AN8488SB ICs for Compact Disc/ CD-ROM Player ■ Application Notes • PD Ta curves of HSOP042-P-0400 PD T a 3.000 2.723 Power dissipation PD (W) 2.500 Mounted on standard board (glass epoxy: 75 × 75 × t0.8 mm3) Rth(j-a) = 45.9°C/W 2.000 1 634 mW 1.500 1.311 1.000 786 mW Independent IC without a heat sink Rth(j-a) = 95.3°C/W 0.500 0.000 0 25 50 75 100 125 150 Ambient temperature Ta (°C) • Phase conditions between Hall input and output current H3 H1 Phase of Hall pin H1+ H2+ H3+ A H M L B H L M C M L H D L M H E L H M F M H L H2 H1 H2 H3 0 ECR EC A3 A2 A1 A2 A3 A1 0 Emit Output current 0 Sink A 6 B C D E F ICs for Compact Disc/ CD-ROM Player AN8488SB ■ Application Notes (continued) • 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: (Spindle block) 1. Let an induced voltage generated in each phase as below: (Reference to a motor center point) EA1 = EO × sin (X) · · · (1) EA2 = EO × sin (X+120) · · · (2) EA3 = EO × sin (X+240) · · · (3) X: Phase angle 2. Let a current flowing in each phase as below: IA2 = IO × sin (X+120) · · · (5) IA1 = IO × sin (X) · · · (4) IA3 = IO × sin (X+240) · · · (6) 3. The voltages generated by a wire-wound resistance of a motor are: VR2 = IA2 × R · · · (8) VR3 = IA3 × R · · · (9) VR1 = IA1 × R · · · (7) 4. In each phase, add the voltage generated by an induced voltage and that by a wire-wound resistance. VA1' = (1) + (4) VA2' = (2) + (5) VA3' = (3) + (6) 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 of the spindle block. 3 PSPD = Σ (12 − VAn ) × IAn n=1 (Driver block) PSL = (VM2 − IO · R) × IO VM2: Motor power supply voltage IO: Output current R: Wire wound resistor • 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 Rc-a Ta 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 Tj = Ta + P × (Rj-c + Rc-a ) Make sure that Tj does not exceed 150°C. If it exceeds 150°C, 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 × (Rj-c + Rc-a ) 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. Note) What has been mentioned above is true to a stationary state, not to a transient state. 7 AN8488SB ICs for Compact Disc/ CD-ROM Player ■ Application Circuit Example RCS = 0.6 Ω VM1 = 12 V VCC2 10 7 VP VM2 4 VN 9 32 A3 36 A1 35 A2 34 CS FIN1 SG 29 VM1 M H1+ 16 Upper side distribution H1− 17 Hall amp. Lower side distribution H3+ 20 Hall bias Reset ER Logic EP = ER × EA det. EA Absolute value 26 VTL 12 5 PC RIN = 10 kΩ VCC = 5 V FG signal VREF Low: Short brake High: Reverse rotation break PG2 2 PCI 28 0.1 µF VCC1 22 S/S 25 S/S: High: SPD block on and driver block on Med: SPD block off and driver block on Low: SPD block off and driver block off FG Brake comparator circuit SLIN 11 Thermal protection circuit Start/stop 8 VREF 1 VM2 2 PG1 1 ECR Detection FG 14 EC 27 Lower side power VCC2 det. Direction detection H3− 21 Servo torque command Amp. Direction changeover H2− 19 matrix VH 23 Upper side power BRK 15 H2+ 18 Amp. SLIN