AN8787

AN8787NSB PANASONIC

Document overview

• Manufacturer or author: Provided By digicamel.com
• PDF pages: 7

Technical content

ICs for Compact Disc/CD-ROM Player AN8787NSB 4-channel linear driver IC for CD/CD-ROM drive n Overview The AN8787NSB is a 4-channel driver IC that has 2-channel of H-bridge method actuator driver with current feedback, one channel of BTL type traverse driver and one channel of tri-state output type loading driver. It is optimum for actuator or motor driver of CD/CD-ROM player. It comes with a surface mount package that excels in heat radiat- ing characteristic. n Features

• Little phase delay due to current feedback method (2-channel for actuator)
• Channels for loading motor (H-bridge system) are available for three modes of forward rotation, re- verse rotation and braking
• Muting SW with 2 modes: A loading channel is in operation, and the other 3 channels are in muting; Loading is in muting and the other 3 channels are in operation.
• Standby switch to stop all functions
• Wide output dynamic range is available regard- less of a reference power source on the system.
• I/O gain setting by an external resistor
• Thermal shut-down circuit built-in (with hyster- esis) n Applications
• CD/CD-ROM drive
• DVD/DVD-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°

AN8787NSB ICs for Compact Disc/CD-ROM Player n Block Diagram D1 - D1 + PVC1STB IN1 IN2 AS IN3 IN4 V REF D2 - D2 + PVC2 PVC5 PVC4 D3 + D3 - D4 + D4 - PVC3 Fin Reset Standby PVCC Thermal protect Direction det. current amp. Absolute V-I direction det. Absolute V-I direction det. BTL linear driver ch. 2 ch. 1 ch. 2 ch. 3 ch. 4 PGND2 BTL linear driver ch. 3 BTL linear driver ch. 4 SV CC monitor SV CCSV CC PGND1 Control logic V REF monitor PC 28 Comp. 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 Standby input pin

27 System power supply pin

28 PC (power cut) input pin

Pin No. Description

1 Driver-3 phase compensation pin

2 Driver-3 input pin

3 Driver-4 input pin

4 Driver-3 feedback pin

5 Driver-4 feedback pin

6 Driver-4 phase compensation pin

7 Driver-3, driver-4 power supply pin

8 Driver-4 reverse rotation output pin

9 Driver-4 current feedback power supply 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 AN8787NSB Parameter Symbol Range Unit Supply voltage * SV CC 6.4 to 14 V PV C1 , PVC2 , PVC5 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 582 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 power dissipation, 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 = 582 mW or less at Ta = 85°C, following the allowable power dissipation characteristic curve of "n Application Notes". n Electrical Characteristics at SVCC = VCC1 = VCC2 = 12 V, VCC3 = 5 V, RL = 8 W , VPC = 5 V, VSTB = 5 V, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Current consumption 1 with no ISVCC V PC = 5 V, VSTB = 5 V ¾ 13 30 mA signal Current consumption 2 with no IVCC1 V PC = 5 V, VSTB = 5 V ¾ 46 m A signal Current consumption 3 with no IVCC2 V PC = 0 V, VSTB = 5 V ¾ 14 m A signal Current consumption 4 with no IVCC3 V PC = 5 V, VSTB = 5 V ¾ 14 m A signal Current consumption with no ISVCC-S V PC = 5 V, VSTB = 0 V ¾ 36 m A signal at standby 1 Current consumption with no IVCC1-S V PC = 5 V, VSTB = 0 V ¾ 13 m A signal at standby 2 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- -2.8 0 2.8 dB Limit voltage (+)V L1+ 6.5 8.0 ¾ V Limit voltage (-)V L1- ¾- 8.0 -6.5 V Note) *: Refer to "n Application Circuit Example".

AN8787NSB ICs for Compact Disc/CD-ROM Player n Electrical Characteristics at SVCC = VCC1 = VCC2 = 12 V, VCC3 = 5 V, RL = 8 W , VPC = 5 V, VSTB = 5 V, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit Driver 2 Output voltage 1 (+)V 21+ V CC2 = 5 V, VPC = 0 V 2.5 2.8 3.1 V V IN2 = 4 V, RAS = 10 kW Output voltage 1 (-)V 21- V CC2 = 5 V, VPC = 0 V -3.1 -2.8 -2.5 V V IN2 = 1 V, RAS = 10 kW Output voltage 2 (+)V 22+ V CC2 = 5 V, VPC = 0 V 3.4 4.0 4.6 V V IN2 = 4 V, RAS = 0 kW Output voltage 2 (-)V 22- V CC2 = 5 V, VPC = 0 V -4.6 -4.0 -3.4 V V IN2 = 1 V, RAS = 0 kW Braking ability V BRK V CC2 = 5 V, VPC = 0 V ¾ 0.3 1.0 V IIN2 = 0 mA, IO = 200 mA Input pin bias current I IN2 V CC2 = 5 V, VPC = 0 V, VIN2 = 5 V ¾ 40 100 mA Driver-2 power transistor current Idrv2 V PC = 5 V, IIN2 = 0 mA ¾¾ 1.0 mA at power cut Driver 3 Output offset voltage V OOF-3 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- 1.3 0 1.3 dB Limit voltage (+)V L3+ R S3 = 0.5 W 3.4 3.9 ¾ V Limit voltage (-)V L3- R S3 = 0.5 W¾ - 3.9 -3.4 V Dead zone width V DZ3 R S3 = 0.5 W- 51 54 5m V Driver 4 Output offset voltage V OOF-4 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- 1.3 0 1.3 dB Limit voltage (+)V L4+ R S4 = 0.5 W 3.4 3.9 ¾ V Limit voltage (-)V L4- R S4 = 0.5 W¾ - 3.9 -3.4 V Dead zone width V DZ4 R S4 = 0.5 W- 51 54 5m V Power cut operation PC threshold high-level voltage VPCH 3.5 ¾¾ V PC threshold low-level voltage VPCL ¾¾ 1.0 V PC input current I PC ¾ 70 120 mA Standby operation STB threshold high-level voltage VSTBH 3.5 ¾¾ V STB threshold low-level voltage VSTBL ¾¾ 1.0 V STB pin source current I STB ¾¾ 3 mA

ICs for Compact Disc/CD-ROM Player AN8787NSB 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 = VCC1 = VCC2 = 12 V, VCC3 = 5 V, RL = 8 W , VPC = 5 V, VSTB = 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 PVC5 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 PC Standby Low (open) High Low High (open) Ch. 1, Ch. 3, Ch. 4 Mute Active Standby Active Ch. 2 Active Mute or (exclusive for L0) Mute 4. Do not use ch. 2 (exclusive for loading) at more than 6 V of VCC2 when ch. 2 load is 20 W and less. 5. Appropriate care should be taken on the characteristics. When changing an external circuit constant on actual use, secure an appropriate margin in consideration of characteristic fluctuation of external parts and our ICs including transient characteristics as well as static ones. 6. 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 (short-circuit due to load). Otherwise, the IC is likely to emit smoke and break down. 7. An appropriate prior study should be done for use of dip soldering. RVC5 RS3 RS4 S3 S4PVC3 PVC4 Parameter Symbol Conditions Min Typ Max Unit Reset circuit Reset operation release supply VRST ¾¾ 5V voltage V REF detection voltage V R 1.35 ¾¾ V

AN8787NSB 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 (mW) 0 25 50 75 100 125 150 2 200 3 000 2 600 1 800 2 561 1 200 1 600 800 400 2 000 2 800 2 400 1 120 1 400 1 000 600 200 R th(j-c) = 16°C/W Glass epoxy both side copper foil PCB (75 mm · 75 mm · t1.6 mm) R th(j-a) = 48.8°C/W PD = 2 561 mW (25 °C) Independent IC without a heat shink R th(j-a) = 111.6°C/W PD = 1 120 mW (25 °C) n Application Circuit Example Fin Fin V 4V 3 V 1 R3 R4C3 RC3 RS3 RS4 RC4 RL4 RAS R1V IN2 RL1 RL2 RL3 V CC1 V CC2 V REFSV CC V CC3 When the AN8787NSB 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 | R L1 2. Load current IP2 flowing into load RL2 is supplied through pin 16. IP2 = | V17 -V 15 | R L2

ICs for Compact Disc/CD-ROM Player AN8787NSB n Application Circuit Example (continued) 3. Load current IP3 flowing into load RL3 is supplied through pin 13 via the resistor RS3. IP3 = | V14 -V 12 | R L3 4. Load current IP4 flowing into load RL4 is supplied through pin 9 via the resistor RS4. IP4 = | V10 -V 8 | R L4 5. Dissipation increase (DPD ) inside the IC (power output stage) caused by loads RL1, RL2, RL3 and RL4 is as follows: R L1 R L3 R L3 RL2 R L4 R L4 6. Dissipation increase (DPS) inside the IC (signal block supplied from pin 27) 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 8 | ), where K » 100KK 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) +V CC3 · I(VCC3) 9. Allowable power dissipation in a load operating mode (PD ) comes roughly as follows: PD = PD1 + DPD + DPS