ICs for Compact Disc/CD-ROM Player AN8472SA Spindle motor driver IC for optical disk ■ Overview Unit: mm 32 17 1 16 8.1±0.3 11.0±0.3 6.1±0.3 The AN8472SA is a high performance IC suited for driving a spindle motor of an optical disk such as CD-ROM, DVD etc. Small outline package can be used due to reduced power consumption by adopting the direct PWM drive system. 0.65 +0.10 0.3 –0.05 Seating plane +0.10 1.5±0.2 0.2–0.05 0.1±0.1 (0.625) 0.65±0.10 • 3-phase full-wave 120° duty factor system • Low power consumption due to a direct PWM system • D-MOS transistor with low ON resistance (0.6 Ω typ.) on the output stage • With start and stop pins • Thermal shut-down function built-in • With FG output pin • Reverse breaking by EC/ECR voltage • With Hall bias pin • Surface-mount small package 0.65±0.10 ■ Features (0.5) SSOP032-P-0300 ■ Applications • Optical disk drive of CD-ROM, DVD-ROM, CD-R, CD-RW etc. 1 ICs for Compact Disc/CD-ROM Player VM1 VPUMP 12 BC1 13 BC2 14 BC3 15 BC4 16 18 VDD ■ Block Diagram 31 AN8472SA Step-up voltage circuit Start 11 Start/stop Thermal protection OSC 19 VM2 FG 10 27 A11 H1H 7 28 A12 H1L 6 H2H 5 H2L 4 Hall amp. matrix 21 A31 Amp. 22 A32 H3L 2 PWMOUT 23 RNF2 Hall bias EC 8 FF SRESET RNFOUT VT 26 RNF1 ×5 17 GND ECR 9 FC 32 24 A21 25 A22 Distributor circuit H3H 3 VH 1 Output circuit Amp. Oscillator VC1 SSET ■ Pin Descriptions 2 Pin No. Symbol 1 VH 2 Description Pin No. Symbol Description Hall bias pin 13 BC1 Booster capacitor connection pin 1 H3L Hall element-3 negative input pin 14 BC2 Booster capacitor connection pin 2 3 H3H Hall element-3 positive input pin 15 BC3 Booster capacitor connection pin 3 4 H2L Hall element-2 negative input pin 16 BC4 Booster capacitor connection pin 4 5 H2H Hall element-2 positive input pin 17 GND Ground pin 6 H1L Hall element-1 negative input pin 18 VDD Supply voltage pin 7 H1H Hall element-1 positive input pin 19 VM2 Motor supply voltage pin 2 8 EC Torque command input pin 20 N.C. N.C. 9 ECR Torque command reference input pin 21 A31 Drive output 3 10 FG FG signal output pin 22 A32 Drive output 3 11 Start Start/stop changeover pin 23 RNF2 12 VPUMP Booster pin 24 A21 Current det. pin 2 Drive output 2 ICs for Compact Disc/CD-ROM Player AN8472SA ■ Pin Descriptions (continued) Pin No. Symbol 25 A22 26 RNF1 27 28 Description Pin No. Symbol Description Drive output 2 29 N.C. N.C. Current det. pin 1 30 N.C. N.C. A11 Drive output 1 31 VM1 Motor supply voltage pin 1 A12 Drive output 1 32 FC Oscillator pin ■ Absolute Maximum Ratings Parameter Supply voltage *2 Symbol Rating Unit VDD 6 V V(m) 15 V V(n) 0 to VDD V IDD 30 mA I(o) ±1 200 mA IHB(n) 30 mA PD 293 mW Topr −20 to +70 °C Tstg −55 to +150 °C VM1 VM2 Drive output voltage *5 Control signal input voltage *6 Supply current Drive output current Hall bias current *4 *7 Power dissipation *3 Operating ambient temperature Storage temperature *1 *1 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 voltage in the step-up voltage circuit exceeds the supply voltage. For the allowable value of the step-up voltage, refer to "■ Electrical Characteristics". *3: The power dissipation shown is the value of independent IC without a heat sink at Ta = 70°C. Refer to the PD Ta curves of the "■ Application Notes" for details. *4: o = 19, 21, 22, 23, 24, 25, 26, 27, 28, 31 *5: m = 21, 22, 24, 25, 27, 28 *6: n = 8, 9, 11 *7: n = 1, 2, 3, 4, 5, 6, 7 ■ Recommended Operating Range Parameter Supply voltage Symbol Range Unit VDD 4.5 to 5.5 V VM1 VM2 3 AN8472SA ICs for Compact Disc/CD-ROM Player ■ Electrical Characteristics at Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Overall Circuit current 1 IDD1 VDD = 5 V in power save mode 0 0.1 mA Circuit current 2 IDD2 VDD = 5 V 9 14 mA Start/stop Start voltage VSTART Voltage with which a circuit operates at VDD = 5 V and L → H 2.7 V Stop voltage VSTOP Voltage with which a circuit becomes off at VDD = 5 V and H → L 0.7 V VHB VDD = 5 V, IHB = 20 mA 0.7 1.3 1.6 V IBH VDD = 5 V 1 5 µA Hall bias Hall bias voltage Hall amplifier Input bias current In-phase input voltage range VHBR VDD = 5 V, except for H2H, H2L 1.5 4.0 V Minimum input level VINH VDD = 5 V 60 mV[p-p] EC VDD = 5 V 0.5 3.9 V Offset voltage ECOF VDD = 5 V −100 0 100 mV Dead zone ECDZ VDD = 5 V 0 75 150 mV Input current ECIN VDD = 5 V, EC = ECR = 2.5 V −5 −1 µA Input/output gain ACS VDD = 5 V, RCS = 0.33 Ω 0.36 0.48 0.60 A/V High-level output saturation voltage VOH VDD = 5 V, IO = −500 mA 0.15 0.30 V Low-level output saturation voltage VOL VDD = 5 V, IO = 500 mA 0.15 0.30 V Torque limit current ITL VDD = 5 V, RCS = 0.33 Ω 455 570 685 mA Charging current ICH VDD = 5 V −65 −50 −35 µA Upper threshold voltage VCH VDD = 5 V 1.75 2.50 3.25 V Lower threshold voltage VCL VDD = 5 V 0.35 0.50 0.65 V FG output high-level FGH VDD = 5 V, IFG = − 0.01 mA 3 V FG output low-level FGL VDD = 5 V, IFG = 0.01 mA 0.5 V In-phase input voltage range VFGR VDD = 5 V 1.5 3.0 V FG hysteresis width HFG VDD = 5 V 5 10 20 mV 9.5 15 V Torque command In-phase input voltage range Output OSC FG Step-up circuit Step-up voltage 4 VPUMP VDD = 5 V, VM1 = VM2 = 5 V ICs for Compact Disc/CD-ROM Player AN8472SA ■ Electrical Characteristics at Ta = 25°C (continued) • 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 VDD = 5 V 155 °C Thermal protection hysteresis width ∆TSD VDD = 5 V 45 °C ■ Terminal Equivalent Circuits Pin No. Symbol 1 VH 2 H3L 3 H3H 4 H2L Equivalent circuit 1 Pin 3, 7 2 kΩ (typ.) Pin 2, 6 2 kΩ (typ.) 5 5 H2 6 H1L 7 H1H 8 EC 9 ECR 4 2 kΩ (typ.) 2 kΩ (typ.) Refer to pin 2 VDD 8 9 1 kΩ (typ.) 1 kΩ (typ.) 5 AN8472SA ICs for Compact Disc/CD-ROM Player ■ Terminal Equivalent Circuits (continued) Pin No. Symbol 10 FG Equivalent circuit VDD 50 kΩ (typ.) 10 11 Start 11 41 kΩ (typ.) 41 kΩ (typ.) 12 VPUMP 13 BC1 14 BC2 15 BC3 16 BC4 17 GND Ground pin 18 VDD Supply voltage pin 19 VM2 VM1 BC4 BC3 VPUMP 16 15 12 BC1 BC2 13 14 19 31 VM1 21 24 27 22 25 28 A12 Pin 23, 26 RNF1, RNF2 6 20 N.C. N.C. 21 A31 Refer to pin 19 22 A32 23 RNF2 24 A21 25 A22 26 RNF1 27 A11 28 A12 ICs for Compact Disc/CD-ROM Player AN8472SA ■ Terminal Equivalent Circuits (continued) Pin No. Symbol Equivalent circuit 29 N.C. N.C. 30 N.C. N.C. 31 VM1 Refer to pin 19 32 FC VDD 1 kΩ (typ.) 32 1 kΩ (typ.) ■ Usage Notes • Prevent this IC from being line-to-ground fault. (To be concrete, do not short-circuit any of A31 (pin 21), A32 (pin 22), A21 (pin 24), A22 (pin 25), A11 (pin 27) and A12 (pin 28) with GND pin (pin 17).) • Precaution must be taken on the pin 13 and pin 16 due to approximately 200 V of the static breakdown voltages. (C = 200 pF, R = 0 Ω) ■ Application Notes • PD Ta curves of SSOP032-P-0300 PD T a 1.400 1.289 1.200 Power dissipation PD (W) Mounted on standard board (glass epoxy: 50 × 50 × t0.8 mm3) Rth(j-a) = 96.9°C/ W 1.000 0.800 0.668 0.600 0.400 Independent IC without a heat sink Rth(j-a) = 187.1°C/ W 0.200 0.000 0 25 50 75 100 125 150 Ambient temperature Ta (°C) 7 AN8472SA ICs for Compact Disc/CD-ROM Player ■ Application Notes (continued) • Phase conditions between Hall input and output current Phase of Hall pin H1H H2H H3H A H ML ML B C MH ML L ML MH H D L MH MH E ML H ML F MH MH L H1 H3 H2 H1 H2 H3 0 ECR EC 0 Emit Output current A1 0 Sink Emit Output current A2 0 Sink Emit Output current 0 A3 Sink A 8 B C D E F ICs for Compact Disc/CD-ROM Player AN8472SA 0.1 µF 12 VPUMP VM1 5V 31 13 BC1 14 BC2 0.1 µF 0.1 µF 15 BC3 16 BC4 18 VDD (Connect this capacitor, if necessary, after checking operation.) VDD = 5 V ■ Application Circuit Example Step-up voltage circuit START 11 100 Ω Start/stop OSC Thermal protection 19 VM2 2 200 pF 10 FG 27 A11 H1H 7 28 A12 H1L 6 Output circuit Amp. H2H 5 H2L 4 Hall amp. matrix 24 A21 25 A22 Distributor circuit 21 A31 Amp. H3H 3 22 A32 H3L 2 PWMOUT 23 RNF2 VH 1 100Ω Spindle speed control signal EC 8 FF 26 RNF1 SRESET RNFOUT VT ×5 17 GND RCS = 0.33 Ω ECR 9 FC 32 560 pF Hall bias Oscillator SSET VC1 9