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| 1/11 rev. b structure : silicon monolithic integrated circuit product series : power driver for cd/dvd player type : ba5956fm package outlines : figure 1 power dissipation : figure 2 block diagram : figure 3 application : figure 4 test circuit : figure 5 features 2 channel current feedback type driver, 3 channel btl driver. employs the hsop-m36 power package for compaction. has a wide dynamic range. the thermal shutdown circuit is built. mute circuit is built in. ( except for loading driver ) a power supply is divided into 4 systems. prevcc, powvcc1=actuator, powvcc2=loading motor, powvcc3=sled motor, spindle motor absolute maximum rating (ta=25 ) item symbol rating unit supply voltage prevcc,powvcc 18 power dissipation pd 2.2 *1 maximum output current iomax 1 *2 operating temperature range topr -35 85 storage temperature range tstg -55 150 *1 rating for 70 L70 L (size), 1.6 L (thickness), copper foil occu pation ratio less than 3 , and use of glass-epoxy substrate. when this ic is used above ta=25 , note that this rating decreases 17.6mw each time the temperature increases 1 . *2 this rating of permissible dissipation must not exceed aso. operating supply range prevcc 4.5 14 powvcc 4.5 prevcc
2/11 rev. b electrical characteristics unless otherwise noted, ta=25 , prevcc=powvcc3=12v, powvcc1= powvcc2=5v, bias=1.65v, rl=8 , rd=0.5 ,c=100pf parameter symbol min typ max unit condition test circuit quiescent current iq 34 44 ma figure.5 voltage for mute on vmon 0 0.5 v figure.5 voltage for mute off vmoff 2.0 v figure.5 < actuator driver > output offset current ioof -6 0 6 ma figure.5 maximum output voltage vom 3.6 4.0 v vin= 1.65v figure.5 trans conductance gvc 1.5 1.8 2.1 a/v vin=bias 0.2v figure.5 < sled motor driver pre opamp & opamp> common mode input range vicm 0.4 10.5 v figure.5 input offset voltage viofop -6 0 6 mv figure.5 input bias current ibop 300 na figure.5 low level output voltage volop 0.2 0.5 v figure.5 output source current iso 0.5 ma figure.5 output sink current isi 0.5 ma figure.5 < sled motor driver > output offset voltage voofsl -50 0 50 mv figure.5 maximum output voltage vomsl 8.0 9.5 v vin= 1.65v figure.5 closed loop voltage gain gvsl 17.6 19.6 21.6 db vin= 0.2v figure.5 < loading motor driver > output offset voltage voofld -50 0 50 mv figure.5 maximum output voltage vomld 3.5 4.0 v vin= 1.65v figure.5 gain error by polarity gvld 15.7 17.7 19.7 db vin=bias 0.2v figure.5 < spindle motor driver > output offset voltage voofsp -50 0 50 mv figure.5 maximum output voltage voms 8.0 9.5 v vin= 1.65v figure.5 gain error by polarity gvsp 15.7 17.7 19.7 db vin=bias 0.2v figure.5 this product is not designed for pr otection against radioactive rays. 3/11 rev. b 4/11 rev. b electrical characteristic curves rating for 70mm 70mm(size), 1.6mm(thickness), copper foil occupation ratio less than 3%, and use of glass-epoxy substrate. figure 2 power dissipation 25 50 75 100 125 150 0 0 1 2 3 ambient temperature, ta / pd / w pdpower dissipation 5/11 rev. b 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 18 33 32 31 30 29 28 24 23 22 21 20 19 36 35 34 27 26 25 16 sled driver loading driver spindle driver -+ -+ -+ actuator driver actuator driver -+ -+ -+ -+ -+ -+ det. amp. 2 2 prevcc pvcc3 pvcc2 pgnd pvcc1 pregnd pgnd pvcc1 pvcc2 pvcc3 thermal shut down mute 10k 20k 10k 25k 10k 15k 10k 20k 7.5k 10k 20k 7.5k 7.5k 7.5k unit of resistance: ? figure 3 block diagram pin description no pin name pin description no pin name pin descrition 1 ldbia s input for bias voltage (loading driver) 1 9 vold ( ) inverted output of loading 2 bia s input for bias: voltag e 2 0 vold (+) non inverted output of loading 3 fcin input for focus driver 21 vosl ( ) inverted output of sle d 4 cfcerr1 connection with capacitor for error amplifier 1 22 vosl (+) non inverted output of sle d 5 cfcerr2 connection with capacitor for error amplifier 2 2 3 vosp ( ) inverted output of spindl e 6 mute input for mute control 2 4 vosp (+) non inverted output of spindl e 7 tkin input for tacking driver 2 5 pgnd2 gnd for power block of loading, sled and spindle driver 8 ctkerr1 connection with capacitor for error amplifier 1 2 6 pvcc2 vcc for power block of loading driver 9 ctkerr2 connection with capacitor for error amplifier 2 27 pvcc 3 vcc for power block of sled and spindle driver 1 0 pregn d gnd for pr e - drive block 28 prevcc vcc for pr e - drive block 11 pvcc1 vcc for power block of actuator 2 9 spin input for spindle driver 12 vnffc feedback for focus driver 3 0 opoutsl sled pre op amplifier outpu t 1 3 pgnd1 gnd for power block of actuator 31 opinsl( ) sled pre op amplifier invert inpu t 1 4 vnft k feedback for tracking driver 32 opinsl (+) sled pre op amplifier non invert inpu t 1 5 votk( ) inverted output of tracking 3 3 ldin input for loading driver 1 6 votk (+) non inverted output of tracking 3 4 opout op amplifier outpu t 17 vofc( ) inverted output of focus 3 5 opin( ) op amplifier invert inpu t 18 vofc (+) non inverted output of focus 3 6 opin (+) op amplifier non invert inpu t notes) symbol of + and \ (output of drivers) means polarity to input pin. (for example if voltage of pin3 is high , pin18 is high.) 6/11 rev. b figure 4 application 1 2 3 4 5 6 7 8 9 sled driver loading driver spindle driver -+ -+ -+ actuator driver actuator driver -+ -+ -+ -+ -+ -+ det. amp. 2 2 prevcc pvcc3 pvcc2 pgnd pvcc1 pregnd pgnd pvcc1 pvcc2 pvcc3 thermal shut down mute m m m loading motor sled motor spindle motor sled focus tracking spindle loading mute bias 10k 20k 10k 10k 25k 15k 10k 20k 7.5k 7.5k 7.5k 7.5k 20k 10k 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 servo rd rd tracking coil focus coil ? -com power supply for ? -com loading bias 3 state type 10k 10k 0.1m 7/11 rev. b figure5 test circuit measurement circuit switch table actuator driver actuator driver det. amp. prevcc pvcc3 pvcc2 pgnd pvcc1 pregnd pgnd pvcc1 pvcc2 pvcc3 thermal shut down mute 10k 20k 10k 25k 10k 15k 10k 7.5k 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 spindle driver sled driver loading driver 1 3 4 5 6 7 8 12 7.5k 20k 7.5k 10k 20k 7.5k 2 2 2 opamp inp inm out opamp inp inm out iq mute vin1 vin2 vin3 vin5 100 ? h 100 ? h 5v 8 ? 0.5 ? 0.5 ? io 8 ? 5v 12v 12v 10 11 13 14 15 16 17 18 9 1.65v 1.65v 100pf 100pf 8 ? vo3 8 ? vo4 8 ? vo5 vo2 vo1 io 1 2 1 2 inp inm out 2 3 1 bias vinop voof vbop 1m 4 1m 1 2 iop sw1 sw2 sw3 vbop 10k 10k opamp voop sw4 8/11 rev. b symbol switch input condition measureme nt point sw1 sw2 sw3 sw4 vin1 vin2 vin3 vin5 vinop mute iq 1 1 2 1 1.65v 1. 65v 1.65v 1.65v 2.0v iq vmon 1 1 2 1 1.65v 1. 65v 1.65v 1.65v 2.0v iq vmoff 1 1 2 1 1.65v 1. 65v 1.65v 1.65v 0.5v iq 9/11 rev. b op amplifier input 35,36 pin 2k pre op amplifier input for sled driver 31,32 pin 2k op amplifier output 34 pin op amplifier output for sled driver d3 & driver input d4 30 pin 10k driver input 3,7,29,33 pin 10k inverted output for focus and tracking driver 10k 10k 10k 15,17 pin vref 10/11 rev. b output for driver 10k 10k 10k 16,18,20,22,24 pin (+) 19,21,23pin (-) bias input 1,2 pin 75k 25k feedback for focus and tracking driver 12,14 pin 10k 20k mute 50k 50k 6 pin connection with capacitor for error amplifier 1 4,8 pin 7.5k 7.5k connection with capacitor for error amplifier 2 5,9 pin 15k notes on use 11/11 rev. b 1. thermal-shut- down circuit built-in. in case ic chip temperature rise to 175 (typ.) thermal- shut-down circuit operates and outp ut current is muted. next time ic chip temperature falls below 150 (typ.) 2. in case mute-pin voltage under 0.5v or opened, qu iescent current is muted. mute-pin voltage should be over 2.0v for normal application. 3. in case supply voltage falls below 3. 5v (typ.), output current is mute d. next time supply voltage rises to 3.7v(typ.), the driver blocks start. 4. bias-pin (pin1 and pin2) should be pulled up more than 1.2v. in case bias-pin voltage is pulled down under 1.0v (typ.), output current is muted. 5. in case a capacitance load is connected to the op amplifier output, the amplifier phase margin decreases, which causes the peak or oscillator. when connecting such load, insert a resistance in series between the output and the capacitance load and take a full consideration for frequency characteri stics, to prevent problems during practical use. 6. insert the by-pass capacitor between vcc-pin and gnd- pin of ic as possible as near (approximately 0.1 ? f). 7. heat dissipation fins are attached to the gnd on the inside of the package. make sure to connect these to the external gnd 8. avoid the short-circuits between: output pin and vcc output pin and gnd output pins if this caution is ignored, ic damage may cause smokes. 9. examine in consideration of operating margin, when each driver output falls below sub-voltage of ic (gnd) due to counter-electromotive-force of load. < supplement > current feedback driver trans conductance (output current/input voltage) is shown as follws. wire d rr gm ? ? 1 ( a v ) r wire: P 0.075 ? 0.05 ? typ. :au wire r1120 a www.rohm.com ? 2011 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specified herein is subject to change for improvement without notice. the content specified herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specifications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specified in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specified herein is intended only to show the typical functions of and examples of application circuits for the produc ts. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specified in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any product, such as derating, redundancy, fire control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specified herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law. |
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