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| SA5954 ACTUATOR DRIVER WITH CURRENT FEEDBACK FOR CD - ROM / DVD DESCRIPTION The SA5954 is a four-channel BTL driver IC. Two of them can drive DC motors and two can drive coils, such as focus and tracking actuators of a CD-ROM/DVD-ROM/DVD-PLAYER system, with current feedback. FEATURES * 2 channels of DC motor BTL driver * 2 channels of BTL driver for coils with current feedback * Build-in thermal shutdown circuit * Operating voltage:4.3V~13.2V HSOP - 28-375-0.8 APPLICATIONS * CD-ROM, DVD ORDERING INFORMATION Device SA5954 Package HSOP-28-375-0.8 BLOCK DIAGRAM HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2004.12.10 Page 1 of 7 SA5954 ABSOLUTE MAXIMUM RATING ( Tamb=25C) Characteristics Power Supply Voltage Power Dissipation Operating Temperature Storage Temperature Symbol VCC, PVCC1/2 PD Topr Tstg Ratings 13.5 1.7* -35~+85 -55~+150 Unit V W C C *When mounted on a 70mm X 70mm X 1.6mm glass epoxy board. Reduced by 13.6mW for each increase in Tamb of 1C over 25C ELECTRICAL CHARACTERISTICS (Unless other specified, Tamb=25C, VCC=12V, PVCC1=PVCC2=5V, BIAS=2.5V, RL=8, Rd=0.5, C= 100pF) Characteristics Power Supply Voltage Symbol VCC PVCC1 PVCC2 Quiescent Current Actuator Driver Output Offset Current Maximum Output Amplitude Gain Loading Driver Maximum Output Voltage Output Voltage Offset Closed Loop Gain Sled Driver Output Voltage Offset Maximum Output Voltage Closed Loop Gain Gain error STBY Logic STBY On Voltage STBY Off Voltage VSTBY1 VSTBY2 All Channels Off All Channels On 0 2.0 --0.5 -V V VOOFSL VOMSL GVSL GVSL VIN=BIAS 1.5V PVCC1=5V VIN=BIAS 0.2V VIN=BIAS 0.2V -50 3.6 13.5 0 0 4.0 15.5 1 50 -17.5 2 mV V dB dB VOHOP VOOFLD GVLD VIN=BIAS 0.2V No load 10.8 -100 18.0 11.1 0 20.0 -100 22.0 V mV dB IOOF VOM GM VIN=BIAS 1.5V VIN=BIAS 0.2V -6 3.6 1.3 -4.0 1.5 6 -1.7 mA V A/V ICC Test conditions Min. 4.3 4.3 4.3 -18 Typ. Max. 13.2 VCC VCC 27 mA V Unit HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2004.12.10 Page 2 of 7 SA5954 PIN CONFIGURATION CTKerr1 CTKerr2 PreGND VOTK+ VOFC+ VNFTK VOSL+ VOLD+ PVCC2 VOTKVOFCVOSLVOLDPGND PGND VINTK VINSL STBY BIAS VINLD- VINFC VOLD CFCerr1 CFCerr2 VNFFC VCC PIN DESCRIPTION Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Pin Name VINFC CFCerr1 CFCerr2 VINLD+ VINLDVOLD VNFFC VCC PVCC1 PGND VOLDVOLD+ VOFCVOFC+ VOTK+ VOTKVOSL+ VOSLPGND VNFTK PVCC2 PreGND VINSL CTKerr2 CTKerr1 Input for focus driver Connection with capacitor for focus driver Input (+) for the Loading driver Input (-) for the Loading driver Output for the Loading driver Feedback for focus driver VCC Power VCC for sled driver block Power ground Output (-) for loading driver Output (+) for loading driver Output (-) for focus driver Output (+) for focus driver Output (+) for tracking driver Output (-) for tracking driver Output (+) for sled driver Output (-) for sled driver Power ground Feedback for tracking driver Power VCC 2 Pre ground Input for sled driver Connection with capacitor for tracking driver (To be continued) VINLD+ Description HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn PVCC1 REV:1.0 2004.12.10 Page 3 of 7 SA5954 (Continued) Pin No. 26 27 28 Pin Name VINTK BIAS STBY Input for tracking driver Bias input Standby Description Notes: The indicated polarities for the output pins are under the condition that all inputs are (+). The power supply are PVCC2 for the focus, tracking drivers are PVCC2, PVCC1 for the sled driver, and VCC for the pre-block and loading driver. Therefore, make sure VCC PVCC1, 2. APPLICATION INFORMATION (1) Thermal shutdown If the chip temperature rises above 175C, the thermal shutdown (TSD) circuit is activated and the output circuit enters the mute state, which is off state. The TSD circuit has a temperature hysteresis of 25C. (2) The driver buffer is switched off when the supply voltage falls below 3.5V (Typ.), and is switched back on when the voltage reaches 3.7V (Typ.) again. (3) The stand by circuit logic Stand-by input voltage Below 0.5V or open Above 2.0V block are disabled Recover the normal operation operation The stand-by function is activated so the bias block and power HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2004.12.10 Page 4 of 7 SA5954 ELECTRICAL CHARACTERISTICS CURVES Fig 1. Thermal dissipation curve Fig 2. Driver I/O characteristics (focus and tracking) OUTPUT VOLTAGE:V0(V) Fig 3. Driver I/O characteristics (Loading) Fig 4. Driver I/O characteristics (sled) 60 40 20 0 -20 POWVCC = 5V 10K 100K VCC = 12V 2.5V 10K 10 g Vin 20K 100 180 90 0 -90 -180 1M 10M FREQUENCY: f (Hz) Fig 5. Op-amp I/O characteristics Fig 6. Op-amp phase-frequency, amplitude-frequency characteristics HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2004.12.10 Page 5 of 7 SA5954 TEST CIRCUIT TYPICAL APPLICATION CIRCUIT DSP -COM TRACKING COIL 5V or 12V 28 27 26 25 24 23 22 21 20 SLED MOTOR 19 18 M 17 16 Rd 15 SA5954 1 2 3 4 5 6 7 8 9 10 11 12 13 14 12V 5V or 12V LOADING MOTOR M Rd FOCUS COIL HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.0 2004.12.10 Page 6 of 7 SA5954 PACKAGE OUTLINE HSOP-28-375-0.8 UNIT: mm 10.20.3 7.50.2 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn 0.15 REV:1.0 2.300.20 +0.10 -0.05 2004.12.10 Page 7 of 7 9.5250.2 |
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