AN8737SB

ICs for Optical Disk Drive AN8737SB 3-channel driver IC for optical disk drive s Overview 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. 18.4±0.2 (5.15) (4.8) 28 22 21 15 (1.315) 8.3±0.2 10.93±0.30 Unit: mm 0.30–0.05 +0.10 0° to 10° 1 7 8 14 0.65±0.20 2.7±0.2 s 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 (1.2) 0.8 (6.4) 0.35+0.10 –0.05 Seating plane HSOP042-P-0400 s Applications • CD/CD-ROM player • DVD/DVD-ROM drive 0.1±0.1 1 AN8737SB s Block Diagram PVCC1 ICs for Optical Disk Drive 20 TFLG 16 VO3− 12 15 28 14 19 1 2 VCC PGND1 13 VCC det. Temp. det. 1 2 VCC 17 PGND2 Reset 18 VREF reset PC2 VREF 26 N.C. 10 VRB1 IN1 OUT1 OUT2 IN2 IN3N s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Description Ch. 2 first stage feedback pin Ch. 2 first stage input pin Ch. 1 first stage input pin Ch. 1 first stage feedback pin Ch. 1 current feedback input pin Ch. 1 current feedback output pin Control side power supply pin Ch. 1 & ch. 2 power side power supply pin Ch. 1 reverse direction output pin N.C. Ch. 1 & Ch. 2 mute pin Ch. 2 forward direction output pin Ch. 1 & ch. 2 power side grounding pin Ch. 2 reverse direction output pin Ch. 2 forward direction output pin Pin No. 16 17 18 19 20 21 22 23 24 25 26 27 28 Fin Description Ch. 3 reverse direction output pin Ch. 3 power side grounding pin Ch. 3 mute pin Ch. 3 forward direction output pin TDS flag pin Ch. 3 power side power supply pin N.C. Ch. 3 reverse rotation input pin Standby input pin Ch. 3 forward rotation input pin Reference voltage input pin Ch. 2 current feedback output pin Ch. 2 current feedback input pin Control side grounding pin 2 SGND VFB2 PC1 SB IN3P Fin 27 11 24 23 25 6 3 4 1 2 21 8 9 5 7 PVCC2 VO1− VO1+ VO2+ VO2− VO3+ SVCC VS1 VS2 ICs for Optical Disk Drive s Absolute Maximum Ratings Parameter Supply voltage Supply voltage range Supply current *2 AN8737SB Symbol VCC SVCC , PVCC1 , PVCC2 ISVCC IPVCC1 IPVCC2 Rating 14.0 − 0.3 to +14.0 500 2.0 800 542 −30 to +85 −55 to +150 Unit V V mA A mA mW °C °C Power dissipation *3 *1 PD Topr Tstg *1 Operating ambient temperature Storage temperature 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 "s Application Notes". s Recommended Operating Range Parameter Supply voltage Symbol SVCC PVCC1 , PVCC2 Range 4.5 to 13.5 3.5 to 13.5 Unit V s 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 Current consumption 1 (no signal) Current consumption 2 (no signal) Current consumption 1 (standby) Current consumption 2 (standby) Driver 1, Driver 2 Output offset voltage Gain (+) Relative gain (+/−) Maximum output amplitude (+) Maximum output amplitude (−) Symbol ISVO IPVO ISVSB IPVSB Conditions VIN1 = VIN2 = VREF , VIN3P = 2.5 V VSB = VPC1 = VPC2 = 3.3 V VIN1 = VIN2 = VREF , VIN3P = 2.5 V VSB = VPC1 = VPC2 = 3.3 V VIN1 = VIN2 = VREF , VIN3P = 2.5 V VSB = VPC1 = VPC2 = 0 V VIN1 = VIN2 = VREF , VIN3P = 2.5 V VSB = VPC1 = VPC2 = 0 V VIN = VREF VIN = VREF ±50 mV VIN = 3.3 V, RL1 , RL2 = 4 Ω RS1 , RS2 = 0.5 Ω VIN = 0 V, RL1 , RL2 = 4 Ω RS1 , RS2 = 0.5 Ω Min     Typ 25 25 0.6 0.2 Max 45 45 1.5 1.0 Unit mA mA mA mA RL1 , RL2 = 4 Ω, RS1 , RS2 = 0.5 Ω, RIN1 , RIN2 = 10 kΩ, RF1 , RF2 = 4.3 kΩ VOF1 G1+ G1 VL1+ VL1− −100 9 −1.5 3.65  0 11  4.0 −4.0 100 13 +1.5  −3.65 mV dB dB V V 3 AN8737SB ICs for Optical Disk Drive s 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 Gain (+) Relative gain (+/−) Output voltage (+) Output voltage (−) Input pin bias current Standby operation RL = 8 Ω VOF3 G3+ G3 V3+ V3− IIN3 VIN3N = 5 V, RA1 = 27 kΩ, RA2 = 6.8 kΩ VIN3N = 0 V, RA1 = 27 kΩ, RA2 = 6.8 kΩ VIN3N = 0 V SVCC = 12 V SVCC = 12 V VSB = 5 V SVCC = 12 V SVCC = 12 V SVCC = 12 V SVCC = 12 V VPC1 = 5 V VPC2 = 5 V VIN3P = VIN3N = 2.5 V VIN3P = 2.5 V, VIN3P = 2.5 V±50 mV No external resistor −150 19 −1.5 3.05 −3.75  0 20.5  3.4 −3.4    50     70 70   150 22 +1.5 3.75 −3.05 1  0.7 120  0.7  0.7 120 120 mV dB dB V V µA Symbol Conditions Min Typ Max Unit Output offset voltage High: Active, low or Hi-Z: Standby VSBH VSBL ISB 2.6   V V µA High-level SB threshold voltage Low-level SB threshold voltage SB input current Power cut operation High: Active, low or Hiz: Power cut VPC1H VPC1L VPC2H VPC2L IPC1 IPC2 VRST VR 2.6  2.6     1.20 V V V V µA µA High-level PC1 threshold voltage Low-level PC1 threshold voltage High-level PC2 threshold voltage Low-level PC2 threshold voltage PC1 input current PC2 input current Reset current Reset operation release supply voltage VREF detection voltage • Design reference data 4.5  V V Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Parameter Thermal protection circuit Operating temperature equilibrium value Operating temperature hysteresis width Temperature flag balancing value Temperature flag hysteresis width Symbol Conditions Min     Typ Max     Unit °C °C °C °C TTHD ∆TTHD TFLG ∆TFLG 160 40 150 20 4 ICs for Optical Disk Drive AN8737SB s 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 ∆TTF VFLH ∆VHD SVCC = 12 V Conditions Min    Typ Max    Unit °C V V Thermal protection circuit (continued) Operating temperature difference bet. thermal protection/temperature flag Temperature flag output high value Supply voltage detection hysteresis width 10 5 0.2 s 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 .) RE CE 4 or 1 RIN VIN RFB Input pin 3 or 2 500 Ω 200 Ω Forward rotation pin × 5 12 or 15 × 5 9 or 14 Pwr. amp. RL 4Ω RS 0.5 Ω VREF 6 or 27 500 Ω VREF 5 or 28 Reverse rotation pin VREF 4. On the mode of mute: SB = PC1 = high PC2 = high Ch. 1, Ch. 2 Ch. 3 Active Active PC2 = low or Hi-Z Active Mute SB = PC1 = low or Hi-Z  All mute, power save Never fail to input the same signal into SB pin (pin 24) and PC1 pin (pin 11). 5 AN8737SB s Usage Notes (continued) 5. On the output maximum amplitude (Reference data: typical value) 5.0 ICs for Optical Disk Drive Output maximum amplitude (V) 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. 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). An appropriate prior study should be done for use of dip soldering. 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 7 8 9 6 ICs for Optical Disk Drive s Application Notes • PD  Ta curves of HSOP042-P-0400 PD  T a 2.500 2.240 2.000 AN8737SB Power dissipation PD (W) 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 s Application Circuit Example ICs for Optical Disk Drive Snubber Snubber 12 V 5V RS1 0.5 Ω RL1 4.0 Ω RL2 4.0 Ω RS2 0.5 Ω High: High temp. RL2 8.0 Ω 5V PVCC1 12 VO1+ 15 VO2+ 28 VS2 1 2 VCC PGND1 13 VCC det. Temp. det. 21 PVCC2 1 2 VCC 17 PGND2 18 TFLG VO1− 16 VO3− Reset VREF 26 1.65 V VREF reset 19 VO3+ 14 VO2− SVCC 7 VS1 20 9 8 5 PC2 N.C. 10 PC1 11 OUT1 VRB1 OUT2 VFB2 27 IN1 IN2 SB 24 6.8 kΩ 27 kΩ 560 pF 4.3 kΩ 4.7 kΩ RIN2 = 10 kΩ 560 pF 4.7 kΩ 4.3 kΩ IN3N RIN2 = 10 kΩ High: Active Low : All mute power save 8 IN3P SGND Fin 23 25 6 3 4 1 2