ICs for Optical Disk Drive AN8737SB 3-channel driver IC for optical disk drive ■ Overview Unit: mm 18.4±0.2 (5.15) (4.8) 28 22 21 15 +0.10 0.30–0.05 (1.315) 8.3±0.2 10.93±0.30 The AN8737SB is a BTL type 3-channel driver IC, adopting a current feedback system for 2 channels, which makes it optimum for an actuator and a motor driver of CD-ROM/DVD-ROM. It can also constitute an optimum system in combination with the AN8488SB, a spindle plus loading driver IC. A surface mount-type package of good heat radiation characteristic is used. 0° to 10° 1 7 8 14 ■ Features • Little phase delay due to a current feedback system (2 channels for actuator) • The remaining channel is available for either traverse or loading motor drive. • Wide output dynamic range (4 V/IO = 800 mA) • Standby function built in (all channels can be muted.) • Thermal shut-down circuit built in • With thermal flag pin (6.4) (1.2) 0.8 0.35+0.10 –0.05 Seating plane 0.1±0.1 2.7±0.2 0.65±0.20 HSOP042-P-0400 ■ Applications • CD/CD-ROM player • DVD/DVD-ROM drive 1 AN8737SB ICs for Optical Disk Drive PVCC2 21 VO3+ 19 Temp. det. 16 VO3− 20 TFLG VCC det. SVCC 1 2 VCC PGND1 7 VO2− 14 28 VS2 VO2+ 15 VO1+ 12 VS1 5 9 8 VO1− PVCC1 ■ Block Diagram 1 2 VCC 13 17 PGND2 Reset 18 SGND Fin 25 IN3P 23 IN3N 24 SB 11 PC1 VFB2 VRB1 IN1 OUT1 OUT2 IN2 27 10 6 N.C. 3 4 1 2 VREF VREF reset 26 ■ Pin Descriptions Pin No. 2 Description Pin No. Description 1 Ch. 2 first stage feedback pin 16 Ch. 3 reverse direction output pin 2 Ch. 2 first stage input pin 17 Ch. 3 power side grounding pin 3 Ch. 1 first stage input pin 18 Ch. 3 mute pin 4 Ch. 1 first stage feedback pin 19 Ch. 3 forward direction output pin 5 Ch. 1 current feedback input pin 20 TDS flag pin 6 Ch. 1 current feedback output pin 21 Ch. 3 power side power supply pin 7 Control side power supply pin 22 N.C. 8 Ch. 1 & ch. 2 power side power supply pin 23 Ch. 3 reverse rotation input pin 9 Ch. 1 reverse direction output pin 24 Standby input pin 10 N.C. 25 Ch. 3 forward rotation input pin 11 Ch. 1 & Ch. 2 mute pin 26 Reference voltage input pin 12 Ch. 2 forward direction output pin 27 Ch. 2 current feedback output pin 13 Ch. 1 & ch. 2 power side grounding pin 28 Ch. 2 current feedback input pin 14 Ch. 2 reverse direction output pin Fin Control side grounding pin 15 Ch. 2 forward direction output pin PC2 ICs for Optical Disk Drive AN8737SB ■ Absolute Maximum Ratings Parameter Symbol Rating Unit VCC 14.0 V SVCC , PVCC1 , PVCC2 − 0.3 to +14.0 V ISVCC 500 mA IPVCC1 2.0 A IPVCC2 800 mA PD 542 mW Topr −30 to +85 °C Tstg −55 to +150 °C Supply voltage Supply voltage range Supply current *2 Power dissipation *3 Operating ambient temperature Storage temperature *1 *1 Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C. *2: IPVCC1 be 1 A or less for channel 1 and channel 2, respectively. *3: Use within the range of PD = 542 mW or less at Ta = 85°C, following the allowable power dissipation characteristic curve of "■ Application Notes". ■ Recommended Operating Range Parameter Supply voltage Symbol Range Unit SVCC 4.5 to 13.5 V PVCC1 , PVCC2 3.5 to 13.5 ■ Electrical Characteristics at SVCC = 12 V, PVCC1 = 5 V, PVCC2 = 5 V, RL = 8 Ω, VREF = 1.65 V, VSB = VPC1 = VPC2 = 3.3 V, VIN1 = VIN2 = VIN3 = 1.65 V, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Current consumption 1 (no signal) ISVO VIN1 = VIN2 = VREF , VIN3P = 2.5 V VSB = VPC1 = VPC2 = 3.3 V 25 45 mA Current consumption 2 (no signal) IPVO VIN1 = VIN2 = VREF , VIN3P = 2.5 V VSB = VPC1 = VPC2 = 3.3 V 25 45 mA Current consumption 1 (standby) ISVSB VIN1 = VIN2 = VREF , VIN3P = 2.5 V VSB = VPC1 = VPC2 = 0 V 0.6 1.5 mA Current consumption 2 (standby) IPVSB VIN1 = VIN2 = VREF , VIN3P = 2.5 V VSB = VPC1 = VPC2 = 0 V 0.2 1.0 mA Driver 1, Driver 2 RL1 , RL2 = 4 Ω, RS1 , RS2 = 0.5 Ω, RIN1 , RIN2 = 10 kΩ, RF1 , RF2 = 4.3 kΩ Output offset voltage VOF1 VIN = VREF Gain (+) G1+ VIN = VREF ±50 mV Relative gain (+/−) G1 Maximum output amplitude (+) VL1+ VIN = 3.3 V, RL1 , RL2 = 4 Ω RS1 , RS2 = 0.5 Ω Maximum output amplitude (−) VL1− VIN = 0 V, RL1 , RL2 = 4 Ω RS1 , RS2 = 0.5 Ω −100 0 100 mV 9 11 13 dB −1.5 +1.5 dB 3.65 4.0 V −4.0 −3.65 V 3 AN8737SB ICs for Optical Disk Drive ■ Electrical Characteristics at SVCC = 12 V, PVCC1 = 5 V, PVCC2 = 5 V, RL = 8 Ω, VREF = 1.65 V, VSB = VPC1 = VPC2 = 3.3 V, VIN1 = VIN2 = VIN3 = 1.65 V, Ta = 25°C (continued) Parameter Driver 3 Symbol Conditions Min Typ Max Unit −150 0 150 mV 19 20.5 22 dB −1.5 +1.5 dB RL = 8 Ω Output offset voltage VOF3 VIN3P = VIN3N = 2.5 V Gain (+) G3+ VIN3P = 2.5 V, VIN3P = 2.5 V±50 mV No external resistor Relative gain (+/−) G3 Output voltage (+) V3+ VIN3N = 5 V, RA1 = 27 kΩ, RA2 = 6.8 kΩ 3.05 3.4 3.75 V Output voltage (−) V3− VIN3N = 0 V, RA1 = 27 kΩ, RA2 = 6.8 kΩ −3.75 −3.4 −3.05 V Input pin bias current IIN3 VIN3N = 0 V 1 µA Standby operation High: Active, low or Hi-Z: Standby High-level SB threshold voltage VSBH SVCC = 12 V 2.6 V Low-level SB threshold voltage VSBL SVCC = 12 V 0.7 V VSB = 5 V 50 120 µA SB input current Power cut operation ISB High: Active, low or Hiz: Power cut High-level PC1 threshold voltage VPC1H SVCC = 12 V 2.6 V Low-level PC1 threshold voltage VPC1L SVCC = 12 V 0.7 V High-level PC2 threshold voltage VPC2H SVCC = 12 V 2.6 V Low-level PC2 threshold voltage VPC2L SVCC = 12 V 0.7 V PC1 input current IPC1 VPC1 = 5 V 70 120 µA PC2 input current IPC2 VPC2 = 5 V 70 120 µA VRST 4.5 V VR 1.20 V Reset current Reset operation release supply voltage VREF detection voltage • 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 circuit 4 Operating temperature equilibrium value TTHD 160 °C Operating temperature hysteresis width ∆TTHD 40 °C Temperature flag balancing value TFLG 150 °C Temperature flag hysteresis width ∆TFLG 20 °C ICs for Optical Disk Drive AN8737SB ■ Electrical Characteristics at SVCC = 12 V, PVCC1 = 5 V, PVCC2 = 5 V, RL = 8 Ω, VREF = 1.65 V, VSB = VPC1 = VPC2 = 3.3 V, VIN1 = VIN2 = VIN3 = 1.65 V, Ta = 25°C (continued) • Design reference data (continued) Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Parameter Symbol Conditions Min Typ Max Unit 10 °C 5 V 0.2 V Thermal protection circuit (continued) Operating temperature difference bet. thermal protection/temperature flag ∆TTF Temperature flag output high value VFLH Supply voltage detection hysteresis width ∆VHD SVCC = 12 V ■ Usage Notes 1. Use SVCC at the maximum potential. Otherwise it will cause operation error. 2. Do not use PVCC1 and PVCC2 at 2 V or less, or at the high impedance. 3. Driver 1, driver 2 gain setting (Use a resistor of sufficient power dissipation for RS .) CE 4 or 1 RE RIN Input pin 200 Ω 3 or 2 500 Ω VIN RFB Forward rotation pin × 5 12 or 15 RL × 5 9 or 14 4Ω RS 0.5 Ω Pwr. amp. VREF VREF 6 or 27 500 Ω 5 or 28 Reverse rotation pin VREF 4. On the mode of mute: SB = PC1 = high SB = PC1 = low or Hi-Z PC2 = high PC2 = low or Hi-Z Ch. 1, Ch. 2 Active Active All mute, Ch. 3 Active Mute power save Never fail to input the same signal into SB pin (pin 24) and PC1 pin (pin 11). 5 AN8737SB ICs for Optical Disk Drive ■ Usage Notes (continued) 5. On the output maximum amplitude (Reference data: typical value) Output maximum amplitude (V) 5.0 4.5 4.0 3.5 3.0 0.4 0.6 0.8 1.0 1.1 Load current (A) Use load current at 1 A or less. 6 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. 7 Avoid the short-circuits between output pin or current detection pin and VCC (line-to-supply fault), output pin or current detection pin and GND (line-to-ground fault), and output pins or output pin and current detection pin (load short-ciruit). 8 An appropriate prior study should be done for use of dip soldering. 9 Care should be taken on use of the following pin because of its low static breakdown voltage (C = 200 pF, R = 0 Ω). Pin 18: Breakdown at 200 V 6 ICs for Optical Disk Drive AN8737SB ■ Application Notes • PD Ta curves of HSOP042-P-0400 PD T a 2.500 2.240 Power dissipation PD (W) 2.000 Mounted on standard board (glass epoxy: 75 mm × 75 mm × t1.6 mm) Rth(j-a) = 55.8°C/W 1.500 1.042 1.000 Independent IC without a heat sink Rth(j-a) = 119.9°C/W 0.500 0.000 0 25 50 75 100 125 150 Ambient temperature Ta (°C) 7 AN8737SB ICs for Optical Disk Drive ■ Application Circuit Example Snubber Snubber 12 V VCC det. Temp. det. 5V 21 PVCC2 TFLG 20 SVCC 7 1 2 VCC 19 VO3+ RL2 8.0 Ω High: High temp. 14 VO2− 28 VS2 VS1 5 15 VO2+ VO1− 9 12 VO1+ PVCC1 8 RS2 0.5 Ω 16 VO3− RL2 4.0 Ω RL1 4.0 Ω RS1 0.5 Ω 5V 1 2 VCC PGND1 13 17 PGND2 Reset 18 VREF reset VREF 26 PC2 1.65 V RIN2 = 10 kΩ 8 4.7 kΩ RIN2 = 10 kΩ High: Active Low : All mute power save Fin SGND 25 23 SB 24 PC1 11 VFB2 27 27 kΩ 4.3 kΩ IN3P 4.7 kΩ 6.8 kΩ 560 pF IN3N 4.3 kΩ 2 1 OUT2 560 pF IN2 4 3 IN1 OUT1 6 10 VRB1 N.C.