AN8473SA

AN8473SA PANASONIC

Document overview

• Manufacturer or author: Provided By digicamel.com
• PDF pages: 6

Technical content

ICs for Compact Disc/CD-ROM Player AN8473SA Spindle motor driver IC for optical disk n Overview The AN8473SA is an optical disk driver IC, featuring direct PWM drive, DMOS power drive, low ON resistance of output power MOS and 120° of duty-factor. n Features

• R ON = 0.5 W (for both upper and lower)
• 5 V single power source
• Circuit current 7 mA (including step-up circuit current) n Applications
• Optical disk n Block Diagram 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 Start FG H1H H1L H2H H2L H3H H3L VH EC ECR PWMSW VM21 VM22 VM11 VM12 A11 A12 A21 A22 A31 A32 PG2 PG1 CS GND PWMOUTU PWMOUTL SRESET Step-up voltage circuit OSC
• 5 SSET V C1 V T Start/ stop Thermal protection Amp. Amp. FF Hall amp. matrix Hall bias Absolute value PWM frequency changeover circuit Distributor circuit Output circuit V DD BC1

14 BC2

AN8473SA ICs for Compact Disc/CD-ROM Player n Pin Descriptions Pin No. Symbol Description

17 VM21 Motor supply voltage pin 2

18 VM22 Motor supply voltage pin 2

19 CS Current det. pin 20 N.C. N.C.

21 A31 Drive output 3

22 A32 Drive output 3

23 PG2 Power current det. pin 2

24 A21 Drive output 2

25 A22 Drive output 2

26 PG1 Power current det. pin 1

27 A11 Drive output 1

28 A12 Drive output 1

29 N.C. N.C.

30 PWMSW PWM frequency changeover pin

31 VM12 Motor supply voltage pin 1

32 VM11 Motor supply voltage pin 1

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

13 BC1 Booster capacitor connection pin 1

14 BC2 Booster capacitor connection pin 2

15 GND Ground pin

16 V DD Supply voltage pin

n Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage *2 V DD 6.5 V V M11, 12 V M21, 22 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 -30 to +85 °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.

ICs for Compact Disc/CD-ROM Player AN8473SA n Recommended Operating Range Parameter Symbol Range Unit Supply voltage V DD 4.5 to 5.5 V V M11, 12 V M21, 22 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 . 2 m A Circuit current 2 I DD2 V DD = 5 V including step-up circuit¾ 71 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 1.2 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 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 7 ¾ 10 V

AN8473SA ICs for Compact Disc/CD-ROM Player n Electrical Characteristics at Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit PWM oscillation changeover Input high-level PWM H V DD = 5 V 4.5 ¾¾ V Input low-level PWM L V DD = 5 V ¾¾ 0.5 V

• 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 PWM oscillation changeover PWM frequency high-level f PWMH V DD = 5 V, PWMSW = Low ¾ 80 ¾ kHz PWM frequency low-level f PWML V DD = 5 V, PWMSW = High ¾ 40 ¾ kHz Thermal protection Thermal protection operating T SDON V DD = 5 V ¾ 150 ¾° C temperature Thermal protection hysteresis widthDTSD V DD = 5 V ¾ 40 ¾° C 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 15).)
• Be careful of the following three pins because their static breakdown voltages are low. (C = 200 pF, R = 0 W ) Pin 23: breakdown at 120 V Pin 26: breakdown at 120 V n Application Notes
• PD ¾ Ta curves of SSOP032-P-0300 PD ¾ Ta Ambient temperature Ta (°C) Power dissipation PD (mW) 000 200 400 600 534 800 1 000 1 400 1 200 1 032 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 PD = 1 032 mW (25°C) Independent IC without a heat sink R th(j-a) = 187.1°C/ W PD = 534 mW (25°C)

ICs for Compact Disc/CD-ROM Player AN8473SA 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

AN8473SA ICs for Compact Disc/CD-ROM Player n Application Circuit Example PWMOUTU PWMOUTL SRESET Step-up voltage circuit OSC SSET V C1 V T Start/ stop Thermal protection Amp. Amp. FF Hall amp. matrix Hall bias Absolute value PWM frequency changeover circuit Distributor circuit Output circuit EC ECR PWMSW Start FG H1H H1L VH VM12 A11 A12 A21 A22 A31 A32 PG2 CS GND H2H H2L H3H H3L VPUMP BC1 BC2 0.1 mF 0.1 mF R CS = 0.33 W 100W

100 W 2 200 pF

(Check the stipulated value of electrical characteristics and then determine resistance value.) Spindle speed control signal V DD High: 40 kHz Low: 80 kHz 100 mF