SA5624 ACTUATOR DRIVER WITH CURRENT FEEDBACK FOR CD – ROM / DVD DESCRIPTION The SA5624 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 HSOP - 28-375-0.8 * 2 channels of BTL driver for coils with current feedback * Build-in thermal shutdown circuit * Operating voltage:4.3V~13.2V APPLICATIONS ORDERING INFORMATION * CD-ROM, DVD Part No. Package SA5624 HSOP-28-375-0.8 BLOCK DIAGRAM HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2005.06.21 Page 1 of 7 SA5624 ABSOLUTE MAXIMUM RATING (Tamb=25°C) Characteristics Power Supply Voltage Power Dissipation Symbol Value Unit VCC, PVCC1/2 13.5 V PD 1.7* W Operating Temperature Topr -35~+85 °C Storage Temperature Tstg -55~+150 °C *When mounted on a 70mm X 70mm X 1.6mm glass epoxy board. Reduced by 13.6mW for each increase in Tamb of 1°C over 25°C ELECTRICAL CHARACTERISTICS (Unless other specified, Tamb=25°C, VCC=12V, PVCC1=PVCC2=5V, BIAS=2.5V, RL=8Ω, Rd=0.5Ω, C= 100pF) Characteristics Power Supply Voltage Quiescent Current Symbol Test conditions Min. Typ. Max. Unit VCC 4.3 -- 13.2 PVCC1 4.3 -- VCC PVCC2 4.3 -- VCC ICC -- 18 27 mA V Actuator Driver Output Offset Current IOOF -6 -- 6 mA 3.6 4.0 -- V Maximum Output Amplitude VOM VIN=BIAS ±1.5V Gain GM VIN=BIAS ± 0.2V 1.3 1.5 1.7 A/V No load 10.8 11.1 -- V -100 0 100 mV 18.0 20.0 22.0 dB -50 0 50 mV 3.6 4.0 -- V VIN=BIAS ±0.2V 13.5 15.5 17.5 dB GVSL VIN=BIAS ±0.2V 0 1 2 dB STBY On Voltage VSTBY1 All Channels Off 0 -- 0.5 V STBY Off Voltage VSTBY2 All Channels On 2.0 -- -- V Loading Driver Maximum Output Voltage VOHOP Output Voltage Offset VOOFLD Closed Loop Gain GVLD VIN=BIAS ±0.2V Sled Driver Output Voltage Offset VOOFSL Maximum Output Voltage VOMSL Closed Loop Gain Gain error GVSL VIN=BIAS ±1.5V PVCC1=5V STBY Logic HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2005.06.21 Page 2 of 7 SA5624 28 27 26 25 24 23 22 VOTK+ VOTK- VOSL+ VOSL- PGND VNFTK PVCC2 PreGND V INSL CTKerr2 CTKerr1 V INTK BIAS STBY PIN CONFIGURATION 21 20 19 18 17 16 15 10 11 12 13 14 VOFC+ VINLD- 9 VOFC- VINLD+ 8 VOLD+ CFCerr2 7 VOLD- VINFC 6 PVCC1 5 PGND 4 VCC 3 VOLD 2 VNFFC 1 CFCerr1 SA5624 PIN DESCRIPTIONS Pin No. Pin Name Description 1 VINFC 2 CFCerr1 Input for focus driver 3 CFCerr2 4 VINLD+ Input (+) for the Loading driver 5 VINLD- Input (-) for the Loading driver Connection with capacitor for focus driver 6 VOLD Output for the Loading driver 7 VNFFC Feedback for focus driver 8 VCC VCC 9 PVCC1 Power VCC for sled driver block 10 PGND Power ground 11 VOLD- Output (-) for loading driver 12 VOLD+ Output (+) for loading driver 13 VOFC- Output (-) for focus driver 14 VOFC+ Output (+) for focus driver 15 VOTK+ Output (+) for tracking driver 16 VOTK- Output (-) for tracking driver 17 VOSL+ Output (+) for sled driver 18 VOSL- Output (-) for sled driver 19 PGND Power ground 20 VNFTK Feedback for tracking driver 21 PVCC2 Power VCC 2 22 PreGND Pre ground 23 VINSL 24 CTKerr2 25 CTKerr1 26 VINTK 27 BIAS Bias input 28 STBY Standby Input for sled driver Connection with capacitor for tracking driver Input for tracking driver HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2005.06.21 Page 3 of 7 SA5624 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 175 , the thermal shutdown (TSD) circuit is activated and the output circuit enters the mute state, that is off state. The TSD circuit has a temperature hysteresis of 25 . (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 operation The stand-by function is activated so the bias block and power block are disabled Recover the normal operation (4) Current feedback driver Trans conductance (output current/input voltage) is shown as below Gm = 1/(Rd + Rwire) (A/V) Rwire is the total wire resistance inside the package, Rwire≈0.15Ω±0.05Ω(typ) ELECTRICAL CHARACTERISTICS CURVES Fig 1. Thermal dissipation curve HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2005.06.21 Page 4 of 7 SA5624 TEST CIRCUIT TYPICAL APPLICATION CIRCUIT HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn REV:1.1 2005.06.21 Page 5 of 7 SA5624 PACKAGE OUTLINE HSOP-28-375-0.8 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn UNIT: mm REV:1.1 2005.06.21 Page 6 of 7 SA5624 ATTACHMENT Revision History Data REV 2004.10.28 1.0 2005.06.21 1.1 Description Original Modify the ”FUNCTION DESCRIPTION” 4 Modify the “ELECTRICAL CHARACTERISTICS CURVE” 5 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn Page REV:1.1 2005.06.21 Page 7 of 7