bp5319 / BP5319X the bp5319 and BP5319X are dc / dc converters for supplying power to liquid crystal displays (lcds) panels. these modules supply a negative voltage from power supply of 5v. they are available in a single in-line package as an upright (bp5319) or l-shaped lead (BP5319X) type. applications lcd panels in copiers, facsimiles, personal computers, word processors, instruments, and other displays features 1) accurate output voltage. ( ? 24v 0.75v) 2) high conversion efficiency. (typically 75%) 3) the external resistor can change an output voltage. 4) built-in protection circuit. 5) built-in on/off switch. 6) compact and light. 7) available as an upright or l-shaped lead type. dc / dc con v er ter f or lcds absolute maximum ratings (ta=25 c) parameter symbol limits unit input voltage output current on / off ctl voltage operating temperature range storage temperature range v in io v ctl topr tstg 7 30 7 ? 10~ + 60 ? 30~ + 85 v ma v c c 1/5
bp5319 / BP5319X pin descriptions electrical characteristics (unless otherwise noted, ta=25 c) parameter symbol min. typ. max. unit conditions input voltage output current output voltage line regulation load regulation output voltage temperature coefficient ripple noise voltage conversion efficiency on / off ctl voltage when off on / off ctl voltage when on on / off ctl input current current consumption when off r1 resistance r2 resistance v in i out v out ? v1 ? v2 ? vt 1 v ctl v ctl i ctl i off r1 r2 4.5 ? ? 24.75 ? ? ? ? 70 2.0 ? ? ? 50 50 ? ? ? 24.00 ? ? ? 10 ? 75 ? ? (alternatively, when open) 100 ? ? ? 5.5 30 ? 23.25 0.24 0.24 ? 150 ? ? 0.5 150 0.5 v ma v v v mv / c mv pp % v v a ma k ? k ? v in =5v, i out =25ma v in =4.5~5.5v, i out =25ma v in =5v, i out =0~25ma v in =5v, i out =25ma ? 2 v in =5v, i out =25ma ? 1 v in =5v, i out =25ma v in =5v v in =5v v in =4.5~5.5v, v ctl =5v ? 2 v in =4.5~5.5v, v ctl =5v ? 2 v in =4.5~5.5v, v ctl =5v ? 2 v in =4.5~5.5v, v ctl =5v ? 2 ? 1 measured with a bandwidth of 20mhz. ? 2 ta= ? 10~6 0 c pin name 1c o output smoothing capacitor connection pin; connect a low-impedance capacitor with a recommended capa- citance of 47 f between this pin and gnd. 2v out output pin 3 vref gnd ground pin; pins 4 and 7 are internal connection. v ctl 9v in output voltage adjustment pin for contrast; output voltages is adjusted by connecting a resistor between pins 2 and 3 or pins 3 and 4. input pin; connect a low-impedance capacitor with a recom- mended capacitance of 100mf between this pin and gnd. pin no. function output on / off control pin; output starts when the pin is low level or open, and stops when the pin high level. 8 4, 7 2/5
bp5319 / BP5319X application example operation notes c1 : 100 f / 16v (low-impedance capacitor) c2 : 47 f / 35v (low-impedance capacitor) c3 : 0.022 f / 50v (ceramic capacitor) measurement circuit bp5319 / BP5319X v out gnd c2 c3 + + v in gnd c1 v ctl on / off sw 1 2 3 4 7 8 9 fig.1 note) set up the change of the output voltage in the range of the territory(fig.2) which can be used. bp5319 / BP5319X v out r1 gnd c2 + + v in gnd c1 on / off 1 2 3 4 7 8 9 (1) when increasing the output voltage (to negative voltage side) bp5319 / BP5319X v out gnd c2 + + v in gnd c1 on / off 1 2 3 4 7 8 9 (2) when reducing the output voltage (near to zero voltage) r2 (1) place i/o external capacitors as near as possible to the connection pins. in particular, make sure to minimize the impedance between the input-side capacitor (c1) and pin 9. (reference value: a length less than 50mm is recommended for a copper foil of 1.0mm wide and 35 m thick.) (2) avoid frequent switching using the on / off ctl pin (5 times per second at the maximum). 3/5 be sure to use fuse for safety be sure to use fuse for safety
bp5319 / BP5319X electrical characteristic curves external dimensions (units : mm) output voltage : v o (v) output current : i o (ma) ? 30 ? 25 ? 20 ? 15 ? 10 010 2030 ? 5 v in = 5v ? 1. r1 > 50k ? r2 < 20k ? ? 2. note that output voltage dereases with increasing output current when the voltage v in is low. r1 2pin ? 3pin r2 3pin ? 4pin ( ) ta=60 c fig.2 usable range unusable range output voltage : v o (v) feed back resistance : r1,r2 ( ? ) 100k 1m 10m ? 17 ? 18 ? 19 ? 20 ? 21 ? 22 ? 23 ? 24 ? 25 ? 26 ? 27 ? 28 ? 30 ? 29 ? 31 r1 (r2= ) r2 (r1= ) v in =5v io=0ma fig.3 output voltage vs. feedback resistance (r1, r2) output voltage : v o (v) feed back resistance : r2 (k ? ) 10 20 30 40 50 60 70 80 90 100 v in =5v i o =0ma ? 20 ? 19 ? 18 ? 17 ? 16 ? 15 ? 14 ? 13 ? 12 ? 11 fig.4 output voltage vs. feedback resistance (r2 < 100kw) bp5319 BP5319X 24.5max. 2.1max. 2.1max. 0.5 0.1 1.3 0.2 pitch 2.54 0.2 2.54 8=20.32 1 5.0max. 0.25 0.05 marked side 1.0max. 6.0max. 234 7 8 9 15.5max. 4.0 1.0 24.5max. 2.1max. 0.5 0.1 0.25 0.05 1.3 0.2 pitch 2.54 0.2 2.54 8=20.32 1 1.0max. 6.0max. 234 7 8 9 16.3max. 5.0max. 4.5 1.0 pin no. pin no. 2.1max. sip9 sip9 (l forming) 4/5
precautions on use of rohm power module 1) the products are designed and produced for application in ordinary electronic equipment (av equipment, oa equipment, telecommunication equipment, home appliances, amusement equipment etc.). if the products are to be used in devices requiring extremely high reliability (medical equipment, transport equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or operational error may endanger human life and sufficient fail-safe measures, please consult with the company's sales staff in advance. if product malfunctions may result in serious damage, including that to human life, sufficient fail-safe measures must be taken, including the following: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits in the case of single-circuit failure 2) the products are designed for use in a standard environment and not in any special environments. application of the products in a special environment can deteriorate product performance. accordingly, verification and confirmation of product performance, prior to use, is recommended if used under the following conditions: [a] use in various types of liquid, including water, oils, chemicals, and organic solvents [b] use outdoors where the products are exposed to direct sunlight, or in dusty places [c] use in places where the products are exposed to sea winds or corrosive gases, including cl2, h2s, nh3, so2, and no2 [d] use in places where the products are exposed to static electricity or electromagnetic waves [e] use in proximity to heat-producing components, plastic cords, or othe flammable items [f] use involving sealing or coating the products with resin or other coating materials [g] use involving unclean solder or use of water or water-soluble cleaning agents for cleaning after soldering [h] use of the products in places subject to dew condensation 3) the products are not radiation resistant. 4) the company is not responsible for any problems resulting from use of the products under conditions not recommended herein. 5) the company should be notified of any product safety issues. moreover, product safety issues should be periodically monitored by the customer. safety precautions 1) if change is made to the constant of an external circuit, allow a sufficient margin due to variations of the characteristics of the products and external components, including transient characteristics, as well as static characteristics. please be informed that the company has not conducted investigations on whether or not particular changes in the application examples or external circuits would result in the infringement of patent rights of a third party. 2) the application examples, their constants, and other types of information contained herein are applicable only when the products are used in accordance with standard methods. therefore, if mass production is intended, sufficient consideration to external conditions must be made. precautions regarding application example and external circuits 1) these specifications contain information related to the company?s industrial property. any use of them other than pertaining to the usage of appropriate products is not permitted. duplication of these specifications and its disclosure to a third party without the company?s permission is prohibited. 2) information and data on products, including application examples, contained in these specifications are simply for reference; the company does not guarantee any industrial property rights, intellectual property rights, or any other rights of a third party regarding this information or data. accordingly, the company does not bear any responsibility for: [a] infringement of the intellectual property rights of a third party [b] any problems incurred by the use of the products listed herein. 3) the company prohibits the purchaser of its products to exercise or use the intellectual property rights, industrial property rights, or any other rights that either belong to or are controlled by the company, other than the right to use, sell, or dispose of the products. prohibitions regarding industrial property 5/5
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