AN8783SB PANASONIC

Document overview

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Technical content

ICs for Compact Disc/CD-ROM Player AN8783SB 4-channel linear driver IC for CD/CD-ROM drive n Overview The AN8783SB employs one channel of power op-amp. system and three channels of H-bridge system. Two channels out of three channels of H- bridge method are a current feedback system. So this IC is optimum for driving an actuator and a motor of CD/CD-ROM drive. It comes with a surface mount package which excels in a heat ra- diation characteristic. n Features

  • Little phase delay due to current feedback system (2-channel for actuator)
  • 4 modes of forward, reverse rotations, braking and standby can be selected from channels for load- ing motor (H-bridge method) by a digital signal from a microcomputer.
  • Wide output dynamic range regardless of refer- ence voltage of the system
  • Setting the input level of a driver by an external resistor is possible.
  • PC (power cut) function built-in (common for ch. 1, ch. 3 and ch. 4)
  • Thermal shut-down circuit built-in (with hyster- esis) n Applications
  • CD/CD-ROM drive HSOP042-P-0400 Unit: mm 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°

AN8783SB ICs for Compact Disc/CD-ROM Player n Block Diagram

21 PVC1

N.C. BTL linear driver ch. 4 BTL linear driver ch. 3 BTL linear driver ch. 2 Control logic Comp. Absolute V-l direction det. Absolute V-l direction det. Reset Thermal protect SV CC monitor SV CC V REF monitor Directiondet.currentamp. PGND1 1/2 PVCC ch. 1 ch. 2 ch. 3 PGND2 ch. 4 Pin No. Description

16 Driver-2 power supply pin

17 Driver-2 reverse rotation output pin

18 Driver-1 reverse rotation output pin

19 Driver-1 GND pin

20 Driver-1 forward rotation output pin

21 Driver-1 power supply pin

22 V REF input pin

23 Driver-1 input pin

24 Driver-2 input pin

25 Driver-2 output voltage adjustment pin

26 PC2 (power cut) input pin

27 N.C.

28 Power supply pin

Pin No. Description

1 PC1 (power cut) input pin

2 Driver-3 phase compensation pin

3 Driver-3 input pin

4 Driver-4 input pin

5 Driver-3 feedback pin

6 Driver-4 feedback pin

7 Driver-4 phase compensation pin

8 Driver-4 current feedback power supply pin

9 Driver-4 reverse rotation output pin

10 Driver-4 forward rotation output pin

11 Driver-2, driver-4 GND pin

12 Driver-3 reverse rotation output pin

13 Driver-3 current feedback power supply pin

14 Driver-3 forward rotation output pin

15 Driver-2 forward rotation output pin

ICs for Compact Disc/CD-ROM Player AN8783SB Parameter Symbol Range Unit Supply voltage SV CC 6.4 to 14 V PV C1 , PVC2 4.5 to 14 n Recommended Operating Range Parameter Symbol Rating Unit Supply voltage SV CC 14.4 V Supply current I CC ¾ mA Power dissipation *2 PD 542 mW Operating ambient temperature *1 Topr -30 to +85 °C Storage temperature *1 T stg -55 to +150 °C n Absolute Maximum Ratings Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C. *2: Referring to "n Application Circuit Example", use within the range of PD = 542 mW or less at Ta = 85°C, following the allowable power dissipation characteristic curve of "n Application Notes". n Electrical Characteristics at SVCC = 12 V, VCC1 = 12 V, VCC2 = 5 V, RL = 8 W , VPC1 = 0 V, VPC2 = 5 V, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Current consumption 1 with no ISVCC IIN1 = IIN3 = IIN4 = 0 mA ¾ 15 30 mA signal Current consumption 2 with no IVCC1 IIN1 = IIN3 = IIN4 = 0 mA ¾ 46 m A signal Current consumption 3 with no IVCC2 IIN1 = IIN3 = IIN4 = 0 mA ¾ 14 m A signal Driver 1 Output offset voltage V OOF-1 -30 0 30 mV Gain (+)G 1+ 18.5 21.0 23.5 dB Relative gain (+/-) D G 1- -3.0 0 3.0 dB Limit voltage (+)V L1+ 6.5 8.0 ¾ V Limit voltage (-)V L1- ¾- 8.0 -6.5 V Driver 2 Output voltage 1 (+)V 21+ V PC1 = 5 V, VPC2 = 0 V, VIN2 = 1 V, 2.4 2.7 3.0 V R AS = 10 kW Output voltage 1 (-)V 21- V PC1 = 5 V, VPC2 = 0 V, VIN2 = 4 V, -3.0 -2.7 -2.4 V R AS = 10 kW Output voltage 2 (+)V 22+ V PC1 = 5 V, VPC2 = 0 V, VIN2 = 1 V, 3.4 4.0 ¾ V R AS = 0 kW Output voltage 2 (-)V 22- V PC1 = 5 V, VPC2 = 0 V, VIN2 = 4 V, ¾- 4.0 -3.4 V R AS = 0 kW

AN8783SB ICs for Compact Disc/CD-ROM Player n Electrical Characteristics at SVCC = 12 V, VCC1 = 12 V, VCC2 = 5 V, RL = 8 W , VPC1 = 0 V, VPC2 = 5 V, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit Driver 2 (continued) Braking ability V BRK V PC1 = 5 V, VPC2 = 0 V, VIN2 = 2.6 V, ¾ 0.3 1.0 V IO = 200 mA Input pin bias current I IN2 V PC1 = 5 V, VPC2 = 0 V, VIN2 = 5 V ¾ 40 100 mA Driver-2 power transistor current IDRV2 V PC2 = 5 V, VIN2 = 2.6 V ¾¾ 1.0 mA at power cut Driver 3 Output offset voltage V OOF3 R S3 = 0.5 W- 60 ¾ 60 mV Gain (+)G 3+ R S3 = 0.5 W 8.5 10.5 12.5 dB Relative gain (+/-) DG 3 R S3 = 0.5 W- 1.0 0 1.0 dB Limit voltage (+)V L3+ R S3 = 0.5 W 3.3 3.9 ¾ V Limit voltage (-)V L3- R S3 = 0.5 W¾ - 3.9 -3.3 V Dead zone width V DZ3 R S3 = 0.5 W- 51 54 5m V Driver 3 Output offset voltage V OOF4 R S4 = 0.5 W- 60 ¾ 60 mV Gain (+)G 4+ R S4 = 0.5 W 8.5 10.5 12.5 dB Relative gain (+/-) DG 4 R S4 = 0.5 W- 1.0 0 1.0 dB Limit voltage (+)V L4+ R S4 = 0.5 W 3.3 3.9 ¾ V Limit voltage (-)V L4- R S4 = 0.5 W¾ - 3.9 -3.3 V Dead zone width V DZ4 R S4 = 0.5 W- 51 54 5m V Power cut operation PC1 threshold high-level voltage VPC1H 3.5 ¾¾ V PC1 threshold low-level voltage VPC1L ¾¾ 1.0 V PC2 threshold high-level voltage VPC2H 3.5 ¾¾ V PC2 threshold low-level voltage VPC2L ¾¾ 1.0 V PC1 input current I PC1 ¾ 70 120 mA PC2 input current I PC2 ¾ 70 120 mA Reset circuit Reset operation release supply VRST ¾¾ 5V voltage V REF detection voltage V R 1.35 ¾¾ V

ICs for Compact Disc/CD-ROM Player AN8783SB Parameter Symbol Conditions Min Typ Max Unit Thermal protection circuit Thermal protection operating TTHD ¾ 160 ¾° C temperature Thermal protection hysteresisDTTHD ¾ 45 ¾° C width Reset circuit Voltage detection reset V HYS ¾ 0.2 ¾ V hysteresis width n Electrical Characteristics at SVCC = 12 V, VCC1 = 12 V, VCC2 = 5 V, RL = 8 W , VPC1 = 0 V, VPC2 = 5 V, Ta = 25°C (continued)

  • Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. n Usage Notes 1. SV CC must be used in the highest potential. Otherwise it possibly causes an operation error. 2. Ch. 3 and ch. 4 are current feedback type drivers. Do not apply voltage directly to PVC3 and PVC4, but apply from PVC2 through the current feedback detection resistors RS3 and RS4 , respectively. And commonly connect S3 pin to PVC3 pin and S4 pin to PVC4 pin. At this time, as an output current flows on the detection resistors RS3 and RS4, use a resistor which has a sufficient allowable power dissipation. To set gain for ch. 3 and ch. 4, use the following formula: | VIN3(4) -V REF | · 2.2 kW = RS3(4) · IOUT3(4)R 3(4) + 500 W (IOUT3 and IOUT4 are the load current for ch. 3 and ch. 4, respectively.) 3. Power cut operation While ch. 2 is exclusive to a loading motor, ch. 2, ch. 3 and, ch. 4 are driven by the output current from the same 3, ch. 4 when ch. 2 is being drived. 4. Appropriate care should be taken on the characteristics. When changing an external circuit constant on actual use, secure an appropriate margin in consideration of charac- teristic fluctuation of external parts and our ICs including transient characteristics as well as static ones. 5. Avoid the short-circuits between output pin and V CC , output pin and GND (line-to-supply and line-to-ground), and between output pins (load short-circuit). Otherwise, the IC is likely to emit smoke and break down. RVC2 RS3 RS4 S3 S4PVC3 PVC4

AN8783SB ICs for Compact Disc/CD-ROM Player n Application Notes

  • PD ¾ Ta curves of HSOP042-P-0400 PD ¾ Ta Ambient temperature Ta (°C) Power dissipation PD (W) 0.000 0.500 1.000 1.042 1.500 2.000 2.240 2.500 25 50 75 100 125 150 Independent IC without a heat sink R th(j-a) = 119.9°C/W Mounted on standard board (glass epoxy: 75 mm · 75 mm · t1.6 mm) R th(j-a) = 55.8°C/W n Application Circuit Example 12 8 FinFin V3 V4 RASSV CC V CC2 V CC1V REFV IN2 RC1 RC2 RL4 RL3 RL2RL1 C2RS3 RS4 R3 R4 When the AN8783SB is use, take into account the following cautions and follow the power dissipation characteristic curve. 1. Load current IP1 flowing into load RL1 is supplied through pin 21. IP1 = | V20 -V 18 | /RL1 2. Load current IP2 flowing into load RL2 is supplied through pin 16. IP2 = | V17 -V 15 | /RL2 3. Load current IP3 flowing into load RL3 is supplied through pin 13 via the resistor RS3. IP3 = | V14 -V 12 | /RL3 4. Load current IP4 flowing into load RL4 is supplied through pin 8 via the resistor RS4. IP4 = | V10 -V 9 | /RL4

ICs for Compact Disc/CD-ROM Player AN8783SB n Application Circuit Example (continued) 5. Dissipation increase (DPD ) inside the IC (power output stage) caused by loads RL1, RL2, RL3 and RL4 is as follows: R L1 RL3 R L3 RL2 R L4 R L4 6. Dissipation increase (DPS) inside the IC (signal block supplied from pin 28) caused by loads RL1, RL2, RL3 and RL4 comes roughly as follows: DPS = 3 · V 1 · (2 · SV CC + | V20 -V 18 | ) +IP2 · (SVCC - | V17 -V 15 | ) R1 K + IP3 · (SV CC - | V14 -V 12 | ) +IP4 · (SVCC - | V10 -V 9 | ), where K » 100 7. Dissipation increase in a driver operating mode is DPD + DPS . 8. Allowable power dissipation without load (PD1 ) can be found as follows: PD1 = SV CC · I(SVCC) +V CC1 · I(VCC1) + VCC2 · I(VCC2) 9. Allowable power dissipation in a load operating mode (PD ) comes roughly as follows: PD = PD1 + DPD + DPS