1/4 www.rohm.com c 2010 rohm co., ltd. all rights reserved. 2010.02 - rev.a compact medium speed thick film thermal printhead(8dots / mm) KD2008-CG50A KD2008-CG50A is suitable for devices,such as high-speed po s and label printer applications, that require thermal printheads capable of higher printing rates. improved power circuit design means that with heavier current it is possible to print at speeds as high as 125 mm/s. the gk series is t he thus ideal for label printers that need high printing rates. ? applications pos terminal printers label printers cat printers general purpose compact printers ? features 1) using a special compact partial glaze and new heating el ement structure, achieves hi gh-speed printing at 125 mm/s. 2) the use of the newly developed highly-durable conductive protective film has improved countermeasures against static electricity. 3) the vh and gnd sections of the power circuitry have been strengthened so that heav ier current can be applied. 4) ultra small connectors, designed to conform wi th ffcs, and miniature driver chips have been used. although the resulting printheads are surprisingly compact and lightweight, they can be used with large platens of up to 20 mm in diameter. 5) one rank resistance value of 800 ?? 3% eliminates the inconven ience of rank selection. ? dimensions (units : mm)
2/4 www.rohm.com c 2010 rohm co., ltd. all rights reserved. 2010.02 - rev.a data sheet KD2008-CG50A ? inner circuit 144 outputs each vh gnd s tb4 s tb3 s tb2 s tb1 clk di1 lat v dd do1 di2 do2 tm tm dot #1728 dot # 1 thermistor 30k b:3950 shift register 121110987654321 connector latch register latch register shift register fig. 1 ? pin configuration no. 1vh vh vh do2 di2 clk lat stb1 stb2 tm gnd gnd gnd gnd 2 3 4 5 6 7 8 9 10 11 12 13 14 circuit no. gnd gnd gnd gnd vh di1 vh vh vh 15 16 17 18 19 20 21 22 23 24 25 26 27 28 circuit tm v dd stb3 stb4 do1
3/4 www.rohm.com c 2010 rohm co., ltd. all rights reserved. 2010.02 - rev.a data sheet KD2008-CG50A ? timing chart ? clock(clk) data in(di) data out(do) latch(lat) strobe(stb) driver out tw clk t setup di t hold di td do t setup lat tw lat t setup stb tdo tdo t hold lat high: black low : white high: black low : white high: hold low : through fig. 2 ? ? ? ? ? ? ? characteristics parameter effective printing width ? rave v h p o slt t on 216 0.125 1728 800 24 0.5 1 0.4 432 5 20 50 / 5 10 7 5 45 mm mm dots v w / dot ms ms dots mhz mm km / pulses c dot pitch total dot number average resistance value applied voltage applied power print cycle pulse width maximum number of dots energized simultaneously maximum clock frequency maximum roller diameter running life / pulse life operating temperature symbol typ. unit ? ? ? ? ? ? ?
4/4 www.rohm.com c 2010 rohm co., ltd. all rights reserved. 2010.02 - rev.a data sheet KD2008-CG50A ? electrical characteristic curves paper : kf50-hda (oji) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 012345 scanning line time ( ms/line) energy ( mj/dot) fig.3 adaptive speed chart 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.00 0.05 0.10 0.15 0.20 0.25 0.30 energy ( mj/dot) optical density slt : 1.00ms/line fig.4 representative density curve scanning line time ( ms/line) energy ( mj/dot) fig.5 maximum energy curve 0 20 40 60 80 100 120 140 160 180 20 10 10 30 50 70 0204060 temperature : resistance : (k ) fig.6 thermistor curve ( c) 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0 0.5 1 1.5 2 2.5 2 .7
r1010 a www.rohm.com ? 2010 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 products. 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, redunda ncy, 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, aerospac e 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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