1/5 rev. a structure : silicon monolithic integrated circuit product name : power driver for dvd players device name : ba5956fm features : ? 2chs for current driving-type btl dr ivers to drive two-axis actuators 1ch for a voltage driving-type btl driver for a feed motor 1ch for a voltage driving-type btl driver for a loading motor 1ch for a voltage driving-type btl driver for a spindle motor ? use of the hsop-m36 power package achieves downsizing of the set. ? a wide dynamic range ? a built-in thermal shut down circuit installed. ? a built-in mute circuit installed. (this circuit can mute the outputs of the drivers except for those for loading motors.) ? the power supplies for prevcc, the act uator part, the loading part, and powvcc of the feed motor part/spindle motor part are provided independently to achieve an efficient drive. { absolute maximum ratings (ta=25 c) parameter symbol limits unit power supply voltage prevcc , powvcc 18 v power dissipation pd 2.2 *1 w maximum output current iomax 1 *2 a operating temperature range topr -35 to 85 c storage temperature range tstg -55 to 150 c *1 when mounted on the glass/epoxy board with the size: 70 mm 70 mm, the thickness: 1.6 mm, and the rate of copper foil occupancy area: 3 % or less. over ta=25 c, derating at the rate of 17.6mw/ c. *2 the power dissipation should be specified within the aso range. { recommended operating conditions (to determine a power supply voltage, the power dissipation must be tak en into consideration.) prevcc 4.5 to 14 (v) powvcc 4.5 to prevcc (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.
2/5 rev. a { electric characteristics (ta=25 c, prevcc=powvcc3=12v, powvcc1=powvcc2=5v, bias=1.65v, r l =8 ? , rd=0.5 ? ,c=100pf, unless otherwise noted.) parameter symbol min typ max unit condition consumption current (at no signal) iq - 34 44 ma no load applied mute on voltage vmon 0 - 0.5 v mute off voltage vmoff 2.0 - - v output offset current ioof -6 0 6 ma maximum output amplitude vom 3.6 4.0 - v vin= 1.65v transfer gain gvc 1.5 1.8 2.1 a/v vin=bias 0.2v input op-amp common mode input range vicm 0.5 - 10.5 v input bias current ibop - - 300 na low-level output voltage volop - 0.2 0.5 v maximum output source current iso 0.5 - - ma maximum output sink current isi 0.5 - - ma output offset voltage voofs l -50 0 50 mv maximum output amplitude vomsl 8.0 9.5 - v vin= 1.65v closed circuit voltage gain gvsl 17.6 19.6 21.6 db vin= 0.2v offset voltage voofl d -50 0 50 mv maximum output amplitude vomld 3.5 4.0 - v vin= 1.65v voltage gain gvld 15.7 17.7 19.7 db vin=bias 0.2v offset voltage voofs p -50 0 50 mv maximum output amplitude voms 8.0 9.5 - v vin= 1.65v voltage gain gvsp 15.7 17.7 19.7 db vin=bias 0.2v { outline dimensions, symbols product numbe r (unit: mm) (max 18.75 include burr )
3/5 rev. a { application circuit diagram resistance unit: [ ? ] { pin numbers, pin names no pin name description no pin name description 1 ldbias loading unit bias input 19 vold(-) loading driver output (-) 2 bias bias input 20 vold(+) loading driver output (+) 3 fcin focus driver input 21 vosl(-) sled driver output (-) 4 cfcerr1 capacitor connecti on terminal 1 for error amp filter 22 vosl(+) sled driver output (+) 5 cfcerr2 capacitor connecti on terminal 2 for error amp filter 23 vosp(-) spindle driver output (-) 6 mute mute terminal 24 vosp(+) spindle driver output (+) 7 tkin tracking driver input 25 pgnd2 power gnd2 8 ctkerr1 capacitor connection terminal 1 for error amp filter 26 pvcc2 power vcc2 9 ctkerr2 capacitor connection terminal 2 for error amp filter 27 pvcc3 power vcc3 10 pregnd pre gnd 28 prevcc pre vcc 11 pvcc1 power vcc1 29 spin spindle driver input 12 vnffc focus driver feedback terminal 30 opoutsl sled pre-stage amp output terminal 13 pgnd1 power gnd1 31 opinsl(-) sled pre-stage amp inverted input terminal 14 vnftk tracking driver feedback terminal 32 opinsl(+) sled pre-stage amp non-inverted input terminal 15 votk(-) tracking driver output (-) 33 ldin loading driver input 16 votk (+) tracking driver output (+) 34 opout op-amp output terminal 17 vofc(-) focus driver output (-) 35 op in(-) op-amp inverted input terminal 18 vofc (+) focus driver output (+) 36 op in(+) op-amp non-inverted input terminal notes: the polarity signs shown in the output terminal names indica te the polarities when corresponding input pins are set to (+).
4/5 rev. a { cautions on use (1) setting the voltage on the mute terminal to open or 0.5v or less will activate a mute function for the ch1, 2, 4, and 5. under conditions of normal use, the mute te rminal should be pulled-up to 2.0v or above. (2) when the power supply voltage drops to 3.5v (typ.) or less, the mute functi on will be activated and, when recovering to 3.7v (typ.) or ab ove, the circuit will startup again. (3) on the bias terminal (pin 1, 2), the applied voltage of 1.0v (typ.) or less will activate a mute function. under conditions of normal use, it should be set to 1.2v or above. (4) connecting a capacitive load to the op-amp output results in a phase margin reduction of the amp and may cause an oscillation or a peak . when connecting a capacitive load, a resistance must be inserted in series between the output and the capaciti ve load. and after care ful consideration of the frequency characteristics, the devic e should be used within the range where no problem is found in actual use. (5) the radiating fin must be c onnected to the external gnd. (6) short-circuit between output pin -vcc (supply fault), output pin-gnd (g round fault), or output terminals (load short) must be avoided. placing ics in wrong orientations may damage the ics or produce smoke. (7) basically, applying a voltage below the ic s ub-potential to any terminals must be avoided. due to a counter electromotive fo rce of the load, if the output on each driver has dropped to the ic sub-potential (gnd) or less, an operation ma rgin must be considered and examined. (8) 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. (9) 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 tem perature, are not found in various characteristics. (10) about gnd potential the electric potential of the gnd terminal must be k ept lowest in the circuitry at any operation states. (11) 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. (12) about operations in a strong electric field when used in a strong electric field, note that a malfunction may occur. (13) aso when using this ic, the output tr must be set not to exceed the values s pecified in the absolute maximum ratings and aso. (14) thermal shutdown circuit 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 s hut off the ic from a thermal runaway and not intended to protect or guarantee the entire ic functions. therefore, users cannot assume t hat the tsd circuit once activat ed can be used cont inuously in the subsequent operations. tsd on temperature [ c] (typ.) hysteresis temperature [ c] (typ.) 175 25 (15) 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 patte rn 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 resistanc e of the pattern wiring and the large current. make sure that the gnd wiring patterns of the external components will not change, too.
5/5 rev. a (16) 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 vari ous parasitic elements. due to the ic structure, the parasitic elements are inevitably created by t he potential relationship. activation of the parasitic elements can cause in terference 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 el ements, for example, applying the lower voltage than the ground level (gnd, p substrat e) to the input terminals. in addition, do not apply the voltage to input termi nals without applying the po wer supply voltage to the ic. also while applying the power supply voltage, t he voltage of each input terminal must not be over the power supply voltage, or within the guarante ed values in the electr ic characteristics. current feedback driver the transfer gain (output current / input curr ent) can be determined by the following equation: g m = wire d r r 1 + (a/v) where r wire represents a gold wire resistance inside the package, measuri ng approximately 0.075 ? ( 0.05 ? ) (typ.)
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. appendix1-rev2.0 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 the americas / eupope / asia / japan contact us : webmaster@ rohm.co. jp www.rohm.com copyright ? 2007 rohm co.,ltd. the products listed in this document are designed to be used with ordinary electronic equipment or de vices (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. 21, saiin mizosaki- cho, ukyo-ku, kyoto 615-8585, japan tel : +81-75-311-2121 fax : +81-75-315-0172 appendix
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