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| 1/8 www.rohm.com 2012.02 - rev. a ? 2012 rohm co., ltd. all rights reserved. stepping motor driver series high performance, high reliability 36v series stepping motor drivers bd6387xefv series description bd6387xefv series are the high-grade type that provides the highest function and highest reliance in the rohm stepping motor driver series. as for its basic function, it is a low power consumpti on bipolar pwm constant current-drive driver with power bd63877/bd63875/bd63873efv are clk-in type drivers and bd63876/bd63874/bd63872efv are parallel-in type drivers. there are excitation modes of full step & half step (2 kinds), quarter step mode, and for current decay mode, the ratio of fast decay & slow decay can be freely set, so the optimum control conditions for every motor can be realized. in addition, being able to drive with one system of power supply makes contribution to the set design?s getting easy. feature 1) single power supply input (rated voltage of 36v) 2) rated output current:(dc) 1.0a, 1.5a, 2.0a 3) low on resistance dmos output 4) clk-in drive mode (bd63877/63875/63873efv) 5) parallel-in drive mode (bd63876/63874/63872efv) 6) pwm constant current c ontrol (other oscillation) 7) built-in spike noise cancel function (external noise filter is unnecessary) 8) full-, half (two kinds)-, quarter-step functionality 9) current decay mode switching function (l inearly variable fast/slow decay ratio) 10) normal rotation & reverse rotation switching function (bd63877/63875/63873efv) 11) power save function 12) built-in logic input pull-down resistor 13) power-on reset function (bd63877/63875/63873efv) 14) thermal shutdown circuit (tsd) 15) over current protection circuit (ocp) 16) under voltage lock out circuit (uvlo) 17) over voltage lock out circuit (ovlo) 18) ghost supply prevention (protects against malfunction when power supply is disconnected) 19) electrostatic discharge: 8kv (hbm specification) 20) adjacent pins short protection 21) inverted mounting protection 22) microminiature, ultra-thin and high heat-radiation (exposed metal type) htssop-b28 package 23) pin-compatible line-up (bd63877/ 63875/63873efv, bd63876/63874/63872efv) application ppc, multi-function printer, laser beam printer, ink jet prin ter, monitoring camera, web ca mera, sewing machine, photo printer, fax, scanner, mini printer, toy, and robot etc. no.12009eat10
technical note 2/8 bd6387xefv series www.rohm.com 2012.02 - rev. a ? 2012 rohm co., ltd. all rights reserved. ? ? Q ? technical note 3/8 bd6387xefv series www.rohm.com 2012.02 - rev. a ? 2012 rohm co., ltd. all rights reserved. ? ? ? ? ? technical note 4/8 bd6387xefv series www.rohm.com 2012.02 - rev. a ? 2012 rohm co., ltd. all rights reserved. parallel-in type (bd63876/63874/63872efv) pin no. pin name function pin no. pin name function 1 gnd ground terminal 15 phase1 phase selection terminal 2 out1b h bridge output terminal 16 i01 vref division ratio setting terminal 3 rnf1 connection terminal of resistor for output current detection 17 i11 vref division ratio setting terminal 4 rnf1s input terminal of current limit comparator 18 phase2 phase selection pin 5 out1a h bridge output terminal 19 i02 vref division ratio setting terminal 6 nc non connection 20 i12 vref division ratio setting terminal 7 vcc1 power supply terminal 21 nc non connection 8 nc non connection 22 vcc2 power supply terminal 9 gnd ground terminal 23 nc non connection 10 cr connection terminal of cr for setting chopping frequency 24 out2a h bridge output terminal 11 nc non connection 25 rnf2s input terminal of current limit comparator 12 mth current decay mode setting terminal 26 rnf2 connection terminal of resistor for output current detection 13 vref output current value setting terminal 27 out2b h bridge output terminal 14 ps power save terminal 28 nc non connection fig.2block diagram & application circuit diagram of bd63876fv/bd63874fv/bd63872fv 0.2 ? ? ? ? ? ? technical note 5/8 bd6387xefv series www.rohm.com 2012.02 - rev. a ? 2012 rohm co., ltd. all rights reserved. ? technical note 6/8 bd6387xefv series www.rohm.com 2012.02 - rev. a ? 2012 rohm co., ltd. all rights reserved. ? technical note 7/8 bd6387xefv series www.rohm.com 2012.02 - rev. a ? 2012 rohm co., ltd. all rights reserved. (7) inter-pin shorts and mounting errors when attaching to a printed circuit board, pay close attention to the direction of the ic and displacement. improper attachment may lead to destruction of the ic. there is also possibility of destruction from short circuits which can be caused by foreign matter entering between out puts or an output and the power supply or gnd. (8) operation in a strong electric field use caution when using the ic in the presence of a strong electr omagnetic field as doing so may cause the ic to malfunction. (9) aso when using the ic, set the output transistor so that it does not exceed absolute maximum ratings or aso. (10) thermal shutdown circuit the ic has a built-in thermal shutdown circuit (tsd circuit). if the chip te mperature becomes tjmax=150 ? technical note 8/8 bd6387xefv series www.rohm.com 2012.02 - rev. a ? 2012 rohm co., ltd. all rights reserved. ??` ??`?? `???`? ? order quantity needs to be multiple of the minimum quantity. datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufac tured for application in ordinary elec tronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electroni c appliances, amusement equipment, etc.). if you intend to use our products in devices requiring ex tremely high reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecra ft, nuclear power controllers, fuel c ontrollers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (?specific applications?), please consult with the rohm sale s representative in advance. unless otherwise agreed in writing by rohm in advance, ro hm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ro hm?s products for specific applications. (note1) medical equipment classification of the specific applications japan usa eu china class class class b class class class 2. rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe desi gn against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditio ns, as exemplified below. accordin gly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of an y rohm?s products under any special or extraordinary environments or conditions. if you intend to use our products under any special or extraordinary environments or conditions (as exemplified bel ow), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] use of our products in any types of liquid, incl uding water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products ar e exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (ev en if you use no-clean type fluxes, cleaning residue of flux is recommended); or washing our products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] use of the products in places subject to dew condensation 4. the products are not subjec t to radiation-proof design. 5. please verify and confirm characteristics of the final or mounted products in using the products. 6. in particular, if a transient load (a large amount of load applied in a short per iod of time, such as pulse. is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 7. de-rate power dissipation (pd) depending on ambient temper ature (ta). when used in seal ed area, confirm the actual ambient temperature. 8. confirm that operation temperat ure is within the specified range descr ibed in the product specification. 9. rohm shall not be in any way responsible or liable for fa ilure induced under deviant condi tion from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the resi due of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be used; if flow soldering met hod is preferred, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, pl ease allow a sufficient margin c onsidering variations of the characteristics of the products and external components, including transient characteri stics, as well as static characteristics. 2. you agree that application notes, re ference designs, and associated data and in formation contained in this document are presented only as guidance for products use. theref ore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution in your manufacturing process and storage so that voltage exceeding t he products maximum rating will not be applied to products. please take special care under dry condit ion (e.g. grounding of human body / equipment / solder iron, isolation from charged objects, se tting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriora te if the products are stor ed in the places where: [a] the products are exposed to sea winds or corros ive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to di rect sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the co rrect direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. use products within the specified time after opening a hum idity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage time period. precaution for product label qr code printed on rohm products label is for rohm?s internal use only. precaution for disposition when disposing products please dispose them proper ly using an authorized industry waste company. precaution for foreign exchange and foreign trade act since our products might fall under cont rolled goods prescribed by the applicable foreign exchange and foreign trade act, please consult with rohm representative in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to application example contain ed in this document is for reference only. rohm does not warrant that foregoi ng information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. rohm shall not be in any way responsible or liable for infringement of any intellectual property rights or ot her damages arising from use of such information or data.: 2. no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the information contained in this document. other precaution 1. this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any wa y whatsoever the products and the related technical information contained in the products or this document for any military purposes, incl uding but not limited to, the development of mass-destruction weapons. 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties. datasheet datasheet notice ? we rev.001 ? 2014 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. |
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