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| 1/5 Structure Product Name Device Name : : : Silicon Monolithic Integrated Circuit BLT Driver For DVD-ROM BA5954FM * 2CHs for current driving-type BTL drivers to drive two-axis actuators * 1CH for a voltage driving-type BTL driver for a feed motor 4-ch driver comprising of 1CH for a voltage driving-type BTL driver for a loading motor * A wide dynamic range (PreVcc=12V, PVcc=5V, 4.0V(Typ.) when RL=8) * The pre-part + feed motor part, the loading motor part, and the actuator part are provided with power supplies independently and its low voltage operation achieves an efficient drive. * A built-in level shift circuit * A built-in thermal shutdown circuit is installed * A built-in standby function installed. Features : ABSOLUTE MAXIMUM RATINGS Parameter Power Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range Symbol Vcc, PVcc1/2 Pd Topr Tstg Limits 13.5 2.2*1 -35 to 85 -55 to 150 Unit V W C C *1 When mounted on the glass/epoxy board with the size: 70 mmx70 mm, the thickness: 1.6 mm, and the rate of copper foil occupancy area: 3% or less. Over Ta=25C, derating at the rate of 17.6mW/C. RECOMMENDED OPERATING CONDITIONS Parameter Symbol Vcc Power supply PVcc1 Voltage PVcc2 Limits 4.3 to 13.2 4.3 to Vcc 4.3 to Vcc Unit V V V This product has not been checked for the strategic materials (or service) defined in the Foreign Exchange and Foreign Trade Control Low of Japan so that a verification work is required before exporting it. Not designed for radiation resistance. REV. A 2/5 ELECTRIC CHARACTERISTICS (Ta=25C, Vcc=12V , PVcc1=PVcc2=5V, BIAS=2.5V, RL=8+, Rd=0.5, C=100pF, unless otherwise noted) Parameter Quiescent Consumption Current Standby Circuit Current Standby ON Voltage Standby OFF Voltage VICM IBOP VOLOP ISO ISI VOOFSL VOMSL GVSL -0.3 0.3 1 -100 7.5 18.0 30 0.1 0.5 0 9.0 20.0 11.0 300 0.3 100 22.0 V nA V V mA mV V dB Vin= 0.2V VIN=BIAS0.2V VIN=BIAS0.2V OUTLINE DIMENSIONS, SYMBOLS Product Number (UNIT:mm) REV. A 3/5 APPLICATION CIRCUIT DIAGRAM PIN NUMBERS, PIN NAMES No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Pin Name VINFC CGCerr1 CFCerr2 VINSL+ VINSLVOSL VNFFC Vcc PVcc1 PGND VOSLVOSL+ VOFCVOFC+ Description Focus driver input Capacitor connection terminal for error amp filter Capacitor connection terminal for error amp filter Op amp input (+) for Sled driver Op amp input (-) for Sled driver Op amp output for Sled driver Focus driver feedback terminal Pre Vcc, Sled driver part power Vcc Loading driver part power Vcc Power GND Sled driver part output (-) Sled driver part output (+) Focus driver part output (-) Focus driver part output (+) No. 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin Name VOTK+ VOTKVOLD+ VOLDPGND VNFTK PVcc2 PreGND VINLD CTKerr2 CTKerr1 VINTK BIAS STBY Description Tracking driver output (+) Tracking driver output (-) Loading driver output (+) Loading driver output (-) Power GND Tracking driver feedback terminal Actuator driver part power Vcc Pre GND Loading driver input Capacitor connection terminal for error amp filter Capacitor connection terminal for error amp filter Tracking driver input Bias input Standby terminal Notes The polarity signs shown in the output terminal names indicate the polarities when corresponding input pins are set to (+). On the power supply terminals of the output H bridge, PVcc2 is set for the focus and tracking drivers, PVcc1 for loading, and Vcc for feed motor. The power supply systems of the pre part are all set to Vcc. Make sure that this device must be used under the following condition: VCC PVcc. REV. A 4/5 CAUTIONS ON USE (1) Setting the Standby terminal to open or 0.5V or less allows the circuit current to be set in the standby mode. Under conditions of normal use, the Standby terminal should be pulled-up to 2.0V or above. (2) When the power supply voltage (Vcc) drops to 3.5V (Typ.) or less, the mute function will be activated and, when recovering to 3.7V (Typ.) or above, the circuit will startup again. (3) On the Bias terminal, the applied voltage of 0.9V (Typ.) or less will activate a mute function. Under conditions of normal use, It should be set to 12V or above. (4) About absolute maximum ratings Exceeding the absolute maximum ratings, such as the applied voltage or the operating temperature range, may cause permanent device damage. As these cases cannot be limited to the broken short mode or the open mode, if a special mode where the absolute maximum ratings may be exceeded is assumed, it is recommended to take mechanical safety measures such as attaching fuses. (5) About power supply lines As a measure against the back current regenerated by a counter electromotive force of the motor, a capacitor to be used as a regenerated-current path can be installed between the power supply and GND and its capacitance value should be determined after careful check that any problems, for example, a leak capacitance of the electrolytic capacitor at low temperature, are not found in various characteristics. (6) About GND potential The electric potential of the GND terminal must be kept lowest in the circuitry at any operation states. (7) About thermal design With consideration of the power dissipation (Pd) under conditions of actual use, a thermal design provided with an enough margin should be done. (8) About operations in a strong electric field When used in a strong electric field, note that a malfunction may occur. (9) ASO When using this IC, the output Tr. must be set not to exceed the values specified in the absolute maximum ratings and ASO. (10) Thermal shutdown circuit (Thermal shutdown: TSD) This IC incorporates a thermal shutdown circuit (TSD circuit). When the chip temperature reaches the value shown below, the coil output to the motor will be set to open. The thermal shutdown circuit is designed only to shut off the IC from a thermal runaway and not intended to protect or guarantee the entire IC functions. Therefore, users cannot assume that the TSD circuit once activated can be used continuously in the subsequent operations. TSD ON Temperature [C] (typ.) 175 Hysteresis Temperature [C] (typ.) 25 (11) About earth wiring patterns When a small signal GND and a large current GND are provided, it is recommended that the large current GND pattern and the small signal GND pattern should be separated and grounded at a single point of the reference point of the set in order to prevent the voltage of the small signal GND from being affected by a voltage change caused by the resistance of the pattern wiring and the large current. Make sure that the GND wiring patterns of the external components will not change, too. (12) This IC is a monolithic IC which has a P+ isolations and P substrate to isolate elements each other. This P layer and an N layer in each element form a PN junction to construct various parasitic elements. Due to the IC structure, the parasitic elements are inevitably created by the potential relationship. Activation of the parasitic elements can cause interference between circuits and may result in a malfunction or, consequently, a fatal damage. Therefore, make sure that the IC must not be used under conditions that may activate the parasitic elements, for example, applying the lower voltage than the ground level (GND, P substrate) to the input terminals. In addition, do not apply the voltage to input terminals without applying the power supply voltage to the IC. Also while applying the power supply voltage, the voltage of each input terminal must not be over the power supply voltage, or within the guaranteed values in the electric characteristics. REV. A 5/5 1 (A/V) Rd + RWIRE Where RWIRE represents a gold wire resistance inside the package, measuring approximately 0.15 (0.05) (Typ.) REV. A Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of which would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM cannot be held responsible for any damages arising from the use of the products under conditions out of the range of the specifications or due to non-compliance with the NOTES specified in this catalog. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact your nearest sales office. ROHM Customer Support System www.rohm.com Copyright (c) 2007 ROHM CO.,LTD. THE AMERICAS / EUPOPE / ASIA / JAPAN Contact us : webmaster@ rohm.co. jp 21, Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan TEL : +81-75-311-2121 FAX : +81-75-315-0172 Appendix1-Rev2.0 |
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