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| 1/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. led drivers for lcd backlights white backlight led driver for medium to large lcd panels (switching regulator type) BD6586MUV description BD6586MUV is white led driver ic with pwm step-up dc/dc c onverter that can boost max 24v and current driver that can drive max 25ma. the wide and precision brightne ss can be controlled by external pwm pulse. BD6586MUV has very accurate current drivers, and it has few cu rrent errors between each strings.so, it will be helpful to reduce brightness spots on the lcd.small package type is suited for saving space. features 1) high efficiency pwm step-up dc/dc converter (fsw=1mhz) 2) high accuracy & good matching (3.0% ) current drivers 4ch (max.25ma/ch) 3) 28v power nch mosfet 4) soft start 5) drive up to 6 in series, 4 strings in parallel 6) rich safety functions ? over-voltage protection ? output short protection ? external sbd open detect ? over current limit ? thermal shutdown ? uvlo 7) small & thin package (vqfn024v4040) 4.0 4.0 1.0mm applications all middle size lcd equipments backlight of notebook pc, portable dvd player, car navigation systems, etc. absolute maximum ratings (ta=25 ) parameter symbol ratings unit condition maximum applied voltage 1 vmax1 7 v vbat, en1, en2, trsw, pwm,testo, iset, test maximum applied voltage 2 vmax2 25 v led1, led2, led3, led4, maximum applied voltage 3 vmax3 30.5 v sw maximum applied voltage 4 vmax4 50.5 v vdet power dissipation 1 pd1 500 *1 mw power dissipation 2 pd2 780 *2 mw power dissipation 3 pd3 1510 *3 mw operating temperature range topr -40 ~ +85 storage temperature range tstg -55 ~ +150 *1 reduced 4.0mw/ with ta>25 when not mounted on a heat radiation board. *2 1 layer (rohm standard board) has been mounted. copper foil area 0mm 2 , when it?s used by more than ta=25 , it?s reduced by 6.2mw/ . *3 4 layer (jedec compliant board) has been mounted. copper foil area 1layer 6.28mm 2 , copper foil area 2~4layers 5655.04mm 2 , when it?s used by more than ta=25 , it?s reduced by 12.1mw/ . no.11040ect35
technical note 2/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV ? ? ? ? ? technical note 3/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV ? current drive r + - iset resistor driver 4ch + + - + - osc current sence pulse control soft start led terminal open/short detector - + sbd open/ output short protect uvlo tsd vbat led1 led2 led3 gnd sw pgnd output over voltage protect iset test vdet led return select erramp pwm comp gnd en1 pwm reference en2 sw vbat sw pgnd trsw testo led4 gnd n.c. n.c. technical note 4/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV ? ? ? ? ? technical note 5/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV technical note 6/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV ? ? ? ? ? ? ? ? ? ? technical note 7/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV ? ? technical note 8/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV 4.7 ? technical note 9/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV sw sw sw test0 test n.c. ise t en2 le d 6 l e d5 l ed 4 l ed 3 le d2 vba t en1 gnd pwm trs w n.c. pgnd pgnd n.c. vde t gnd led1 led2 gnd led3 led4 c vbat to gnd to anode of each led BD6586MUV to power suppl y c out c in sbd l riset 1 2 3 4 5 6 7 8 9 10 11 12 18 17 16 15 14 13 24 23 22 21 20 19 pwm (100hz~1000hz) to anode of led to power suppl y thermal via thermal via technical note 10/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV technical note 11/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV ? ? ? ? ? ? technical note 12/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV 4.7 ? ? ? ? ? ? ? 4.7 ? technical note 13/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV 4.7 ? ? ? ? ? ? ? 4.7 ? technical note 14/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV 4.7 ? 4.7 ? ? ? ? ? ? ? technical note 15/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV 4.7 ? 4.7 ? ? ? ? ? ? ? technical note 16/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV 4.7 ? 4.7 ? ? ? ? ? ? ? technical note 17/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV ? ? ? ? ? ? 4.7 ? 4.7 ? ? ? ? ? ? technical note 18/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV technical note 19/19 www.rohm.com 2011.6 - rev.c ? 2011 rohm co., ltd. all rights reserved. BD6586MUV (unit : mm) vqfn024v4040 0.08 s s 16 7 12 19 24 13 18 0.40.1 0.02 +0.03 - 0.02 1pin mark 2.40.1 c0.2 0.5 4.00.1 0.75 2.40.1 4.00.1 1.0max (0.22) 0.25 +0.05 - 0.04 ? order quantity needs to be multiple of the minimum quantity. 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 specied herein is subject to change for improvement without notice. the content specied 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 specications, 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 specied 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 specied 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 specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied 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, re or any other damage caused in the event of the failure of any product, such as derating, redundancy, re 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 specied 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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