AN8472SA PANASONIC
Document overview
- Manufacturer or author: Provided By digicamel.com
- PDF pages: 9
Technical content
ICs for Compact Disc/CD-ROM Player AN8472SA Spindle motor driver IC for optical disk n Overview 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 adopt- ing the direct PWM drive system. n Features
- 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 W 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 n Applications
- Optical disk drive of CD-ROM, DVD-ROM, CD-R, CD-RW etc. Unit: mm SSOP032-P-0300 11 6 (0.5) (0.625) 11.0±0.3 0.1±0.1 1.5±0.2 8.1±0.3 0.65 0.3 +0.10 –0.05 0.2+0.10 –0.05 Seating plane
AN8472SA ICs for Compact Disc/CD-ROM Player VM2 A11 A12 A21 A22 A31 A32 RNF2 RNF1 GND FF Step-up voltage circuit OSC FG H1H H1L H2H H2L H3H H3L VH EC ECR FC VM1 VPUMP BC1 BC2 BC3 BC4 V DD PWMOUT SSET RNFOUT SRESET V C1 V T 11Start Start/stop Thermal protection Amp. Amp. Hall amp. matrix Hall bias Oscillator Distributor circuit Output circuit n Block Diagram n Pin Descriptions Pin No. Symbol Description
13 BC1 Booster capacitor connection pin 1
14 BC2 Booster capacitor connection pin 2
15 BC3 Booster capacitor connection pin 3
16 BC4 Booster capacitor connection pin 4
17 GND Ground pin
18 V DD Supply voltage pin
19 VM2 Motor supply voltage pin 2
20 N.C. N.C.
21 A31 Drive output 3
22 A32 Drive output 3
23 RNF2 Current det. pin 2
24 A21 Drive output 2
Pin No. Symbol Description
1 VH Hall bias pin
2 H3L Hall element-3 negative input pin
3 H3H Hall element-3 positive input pin
4 H2L Hall element-2 negative input pin
5 H2H Hall element-2 positive input pin
6 H1L Hall element-1 negative input pin
7 H1H Hall element-1 positive input pin
8 EC Torque command input pin
9 ECR Torque command reference input pin
10 FG FG signal output pin
11 Start Start/stop changeover pin
12 VPUMP Booster pin
ICs for Compact Disc/CD-ROM Player AN8472SA n Pin Descriptions (continued) n Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage *2 V DD 6V V M1 V M2 Drive output voltage *5 V (m) 15 V Control signal input voltage *6 V (n) 0 to VDD V Supply current I DD 30 mA Drive output current *4 I(o) –1 200 mA Hall bias current *7 IHB(n) 30 mA Power dissipation *3 PD 293 mW Operating ambient temperature *1 T opr -20 to +70 °C Storage temperature *1 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 voltage in the step-up voltage circuit exceeds the supply voltage. For the allowable value of the step-up voltage, refer to "n 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 ¾ Ta curves of the "n Application Notes" for details. *6: n = 8, 9, 11 Pin No. Symbol Description 29 N.C. N.C. 30 N.C. N.C.
31 VM1 Motor supply voltage pin 1
32 FC Oscillator pin
Pin No. Symbol Description
25 A22 Drive output 2
26 RNF1 Current det. pin 1
27 A11 Drive output 1
28 A12 Drive output 1
Parameter Symbol Range Unit Supply voltage V DD 4.5 to 5.5 V V M1 V M2 n Recommended Operating Range
AN8472SA ICs for Compact Disc/CD-ROM Player n Electrical Characteristics at Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Overall Circuit current 1 I DD1 V DD = 5 V in power save mode ¾ 00 . 1 m A Circuit current 2 I DD2 V DD = 5 V ¾ 91 4 m A Start/stop Start voltage V START Voltage with which a circuit operates 2.7¾¾ V at VDD = 5 V and L fi H Stop voltage V STOP Voltage with which a circuit becomes¾¾ 0.7 V off at VDD = 5 V and H fi L Hall bias Hall bias voltage V HB V DD = 5 V, IHB = 20 mA 0.7 1.3 1.6 V Hall amplifier Input bias current I BH V DD = 5 V ¾ 15 mA In-phase input voltage range V HBR V DD = 5 V, except for H2H, H2L 1.5 ¾ 4.0 V Minimum input level V INH V DD = 5 V 60 ¾¾ mV[p-p] Torque command In-phase input voltage range EC V DD = 5 V 0.5 ¾ 3.9 V Offset voltage EC OF V DD = 5 V -100 0 100 mV Dead zone EC DZ V DD = 5 V 0 75 150 mV Input current EC IN V DD = 5 V, EC = ECR = 2.5 V -5 -1 ¾m A Input/output gain A CS V DD = 5 V, RCS = 0.33 W 0.36 0.48 0.60 A/V Output High-level output saturation voltage VOH V DD = 5 V, IO = -500 mA ¾ 0.15 0.30 V Low-level output saturation voltage VOL V DD = 5 V, IO = 500 mA ¾ 0.15 0.30 V Torque limit current I TL V DD = 5 V, RCS = 0.33 W 455 570 685 mA OSC Charging current I CH V DD = 5 V -65 -50 -35 mA Upper threshold voltage V CH V DD = 5 V 1.75 2.50 3.25 V Lower threshold voltage V CL V DD = 5 V 0.35 0.50 0.65 V FG FG output high-level FG H V DD = 5 V, IFG = - 0.01 mA 3 ¾¾ V FG output low-level FG L V DD = 5 V, IFG = 0.01 mA ¾¾ 0.5 V In-phase input voltage range V FGR V DD = 5 V 1.5 ¾ 3.0 V FG hysteresis width H FG V DD = 5 V 5 10 20 mV Step-up circuit Step-up voltage V PUMP V DD = 5 V, VM1 = VM2 = 5 V 9.5 ¾ 15 V
ICs for Compact Disc/CD-ROM Player AN8472SA n 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 T SDON V DD = 5 V ¾ 155 ¾° C temperature Thermal protection hysteresis widthDTSD V DD = 5 V ¾ 45 ¾° C n Terminal Equivalent Circuits Pin No. Symbol Equivalent circuit 1V H
2 H3L
4 H2L
6 H1L Refer to pin 2
9 ECR
Pin 3, 7 Pin 2, 6 2 kW(typ.) 2 kW(typ.) 2 kW(typ.) 2 kW(typ.) V DD 1 kW(typ.) 1 kW(typ.)
AN8472SA ICs for Compact Disc/CD-ROM Player n Terminal Equivalent Circuits (continued) Pin No. Symbol Equivalent circuit 10 FG
11 Start
12 VPUMP
13 BC1
14 BC2
15 BC3
16 BC4
19 VM2
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
(typ.) 41 kW (typ.) V DD 50 kW(typ.) 13 14 16 15 12 VM1 BC1 BC2 BC3 VPUMPBC4 3119 Pin 23, 26 A12 VM1 RNF1, RNF2
ICs for Compact Disc/CD-ROM Player AN8472SA n 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
(typ.) 1 kW (typ.) V DD n 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 W ) n Application Notes
- PD ¾ Ta curves of SSOP032-P-0300 PD ¾ Ta Ambient temperature Ta (°C) Power dissipation PD (W) 0.000 0.200 0.400 0.600 0.668 0.800 1.000 1.400 1.200 1.289 25 50 75 100 125 150 Mounted on standard board (glass epoxy: 50 · 50 · t0.8 mm3) R th(j-a) = 96.9°C/ W Independent IC without a heat sink R th(j-a) = 187.1°C/ W
AN8472SA ICs for Compact Disc/CD-ROM Player n Application Notes (continued)
- Phase conditions between Hall input and output current H1 H3 H2 H1 H2 H3 ABCDEF EC ECR Emit Output current Sink Emit Output current Sink Emit Output current Sink Phase of Hall pin A H1H H2H H3H HM L M L MH L MH ML ML H ML H ML MH MH L LM H M H B C D E F
ICs for Compact Disc/CD-ROM Player AN8472SA n Application Circuit Example VM1 VPUMP BC1 BC2 BC3 BC4 V DD START H1H H1L H2H H2L H3H H3L VH FC RNF2 RNF1 GND VM2 A11 A12 A21 A22 A31 A32 FG EC ECR V DD = 5 V 0.1 mF 0.1 mF 0.1 mF R CS = 0.33 W 560 pF 100W 100 W (Connect this capacitor, if necessary, after checking operation.) Spindle speed control signal FF Step-up voltage circuit OSC PWMOUT SSET RNFOUT SRESET V C1 V T
11 Start/stop Thermal
Amp. Amp. Hall amp. matrix Hall bias Oscillator Distributor circuit Output circuit 2 200 pF