AN8480NSB

AN8480NSB PANASONIC

Document overview

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

Technical content

ICs for Compact Disc/CD-ROM Player AN8480NSB 3-phase full-wave motor driver IC n Overview The AN8480NSB is a 3-phase full-wave motor driver IC with a reverse rotation brake/short brake changeover function, incorporating a thermal pro- tection circuit with its protection monitor pin. n Features

• 3-phase full-wave and snubberless
• FG output
• Current limit
• Reverse rotation prevention
• Thermal protection circuit built-in (with thermal protection monitor pin) n Applications
• Various types of optical disk drive n Block Diagram Unit: mm HSOP042-P-0400 17 8 1 4 (1.315) 0.65±0.20 28 22 21 (4.8) (6.4)(1.2) (5.15) 18.4±0.2 10.93±0.30 0.35+0.10 –0.05 0.30 +0.10 –0.05

0.8 Seating plane

0° to 10° Hall bias Start/stop Thermal protection circuit Absolute value Brake circuit Hall amp. matrix Detection Upper side distribution Lower side distribution Logic Amp. Amp. Direction detection Direction changeover EA ER VTL S/S V CC PCI BRK TSDF ECR EC VH H3 - H3 + H2 - H2 + H1 - H1 + SG EP = ER · EA FG comparator VM CS1 PG FG

AN8480NSB ICs for Compact Disc/CD-ROM Player n Pin Descriptions n Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage V CC 7.0 V V M 14.4 Control signal input voltage *4 V (n) 0 to VCC V Supply current I CC 30 mA Output current *3 IO(n) –1 200 mA Hall bias current I HB 50 mA Power dissipation *2 PD 667 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: For 70°C and IC alone. Pin No. Symbol Description

15 SG Signal GND pin

16 V CC Supply voltage pin

17 ECR Torque command reference input pin

18 EC Torque command input pin

19 N.C. N.C.

20 PCI Current feedback phase compensation pin

21 VM Motor supply voltage pin

22 CS Current det. pin 1 23 N.C. N.C. 24 N.C. N.C. 25 N.C. N.C.

26 A3 Drive output 3

27 A2 Drive output 2

28 A1 Drive output 1

Pin No. Symbol Description

1 PG Power GND pin

2H 1 + Hall element-1 positive input pin 3H 1 - Hall element-1 negative input pin 4 N.C. N.C. 5H 2 + Hall element-2 positive input pin 6H 2 - Hall element-2 negative input pin

7 VH Hall bias pin

8H 3 + Hall element-3 positive input pin 9H 3 - Hall element-3 negative input pin

10 SS Start/stop changeover pin

11 TFLG Thermal protection monitor pin

12 FG FG signal output pin

13 BRK Brake mode setting pin

14 N.C. N.C. n Recommended Operating Range Parameter Symbol Range Unit Supply voltage V CC 4.25 to 5.5 V V M 4.5 to 14

ICs for Compact Disc/CD-ROM Player AN8480NSB n Electrical Characteristics at Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Overall Circuit current 1 I CC1 V CC = 5 V in power save mode ¾ 00 . 1 m A Circuit current 2 I CC2 V CC = 5 V, IO = 0 mA 1 8 16 mA Start/stop Start voltage V START Voltage with which a circuit operates 2.7¾¾ V at VCC = 5 V and L fi H Stop voltage V STOP Voltage with which a circuit becomes¾¾ 0.7 V off at VCC = 5 V and H fi L Medium voltage V MED Voltage with which VPC1 becomes 1.55 ¾ 1.75 V low at VCC = 5 V and EC = 0 V Hall bias Hall bias voltage V HB V CC = 5 V, IHB = 20 mA 0.7 1.2 1.6 V Hall amplifier Input bias current I BH V CC = 5 V ¾ 15 mA In-phase input voltage range V HBR V CC = 5 V 1.5 ¾ 4.0 V Minimum input level V INH V CC = 5 V 60 ¾¾ mV[p-p] Torque command In-phase input voltage range EC V CC = 5 V 0.5 ¾ 3.9 V Offset voltage EC OF V CC = 5 V -100 0 100 mV Dead zone EC DZ V CC = 5 V 25 75 125 mV Input current EC IN V CC = 5 V, EC = ECR = 1.65 V -5 -1 ¾m A Input/output gain A CS V CC = 5 V, RCS = 0.5 W 0.75 1.0 1.25 A/V Output High-level output saturation voltage VOH V CC = 5 V, IO = -300 mA ¾ 0.9 1.6 V Low-level output saturation voltage VOL V CC = 5 V, IO = 300 mA ¾ 0.2 0.6 V Torque limit current I TL V CC = 5 V, RCS = 0.5 W 400 500 600 mA FG FG output high-level FG H V CC = 5 V, IFG = - 0.01 mA 3.0 ¾ V CC V FG output low-level FG L V CC = 5 V, IFG = 0.01 mA ¾¾ 0.5 V In-phase input voltage range V FGR V CC = 5 V, 1.5 ¾ 3.0 V Input D-range at H2+, H2- FG hysteresis width H FG V CC = 5 V 1 10 20 mV Brake cirrcuit Short brake model level V SBR V CC = 5 V ¾¾ 1.0 V Reverse rotation brake mode level VRBR V CC = 5 V 3.5 ¾¾ V Short brake start level V SBRL V CC = 5 V, ECR = 1.65 V 1.65 1.74 ¾ V Short brake current I SBR V CC = 5 V 12 35 ¾ mA

AN8480NSB ICs for Compact Disc/CD-ROM Player 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 CC = 5 V, DEC = 100 mV ¾ 160 ¾° C temperature Thermal protection hysteresis widthDTSD V CC = 5 V, DEC = 100 mV ¾ 45 ¾° C Thermal protection flag Level at thermal protection = on V TSDON V CC = 5 V ¾¾ 0.5 V Level at thermal protection = off V TSDOFF V CC = 5 V 3.0 ¾¾ V n 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).) n Application Notes
• PD ¾ Ta curves of HSOP042-P-0400 PD ¾ Ta 0.000 0.500 1.042 1.000 1.500 2.000 2.240 2.500 Mounted on standard board (glass epoxy: 75 · 75 · t1.6 mm3) R th(j-a) = 55.8°C/W Independent IC without a heat sink R th(j-a) = 119.9°C/W Power dissipation PD (W) 02 5 Ambient temperature Ta (°C) 50 125 75 100 150

ICs for Compact Disc/CD-ROM Player AN8480NSB n Application Notes (continued)

• Phase conditions between Hall input and output current A B C D E F Phase of Hall pin H1 + H3 +H2 + HM L HML MLH LMH LM H ML H ECR EC ABCDE H1 H2 H2H1H3 A3 A3 A2 A1 A2 A1 F Emit Output current Sink
• 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 · sin (X) · · · (1) E A2 = EO · sin (X+120) · · · (2) EA3 = EO · sin (X+240) · · · (3) X: Phase angle 2. Let a current flowing in each phase as below: IA1 = IO · sin (X) · · · (4) I A2 = IO · sin (X+120) · · · (5) IA3 = IO · sin (X+240) · · · (6) 3. The voltages generated by a wire-wound resistance of a motor are: 4. In each phase, add the voltage generated by an induced voltage and that by a wire-wound resistance. 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. V A1 = V A1 ' - MIN (VA1 ', VA2 ', VA3 ') · · · (10) V A2 = V A2 ' - MIN (VA1 ', VA2 ', VA3 ') · · · (11) V A3 = V A3 ' - 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 = S (12 - VAn ) · IAn n=1

AN8480NSB ICs for Compact Disc/CD-ROM Player n Application Notes (continued)

• Theory of thermal resistance A chip temperature or the fin temperature can be understood in the same way as Ohm's Law. Tj : Chip temperature T a : Ambient temperature P : Electric power generated by IC R j-c: Thermal resistance between a chip and a package R c-a: Thermal resistance between a package and a surface of a heat sink or free air R f : Thermal resistance between a package and surface of a heat sink Tj = Ta + P · (Rj-c + Rc-a // Rf) 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 R f in the above figure. Tj = Ta + P · (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. n Application Circuit Example R f Tj R j-c R c-a Ta P ECR SG15 Hall bias Start/stop Thermal protection circuit Absolute value Brake circuit Hall amp. matrix Detection Upper side distribution Lower side distribution Logic Amp. Amp. Direction detection Direction changeover EA ER VTL BRK TSDF EP = ER · EA FG comparator VH H3 - H3 + H2 - H2 + H1 - H1 + ECServo torque command S/S V CC PCI VM CS1 PG FG High: Start Medium: FG is on. Low: Stop Low: Short brake High: Reverce rotation brake Low: TSD on High: TSD off V CC = 5 V 0.1 mF V M = 12 V R CS = 0.5 W FG signal