kd2002-df10a printheads rev.a 1/4 compact medium speed thick film thermal printhead (8 dots / mm) kd2002-df10a using its expertise in lsi technology, rohm has developed new high density driver chips for use in the kd2002-df10a . capable of being employed for both thermal and thermal transf er printing, with a print speed of 250mm/s, the resulting print heads are the fastest in their class. this high-speed and high-density printing answers the needs of pos, atm, kiosk and ticket printing devices, which are increasingly being called upon to produce graphical output. z applications pos printers atm printers kiosk printers ticket printers z features 1) the use of a special partial glaze and the latest heating elem ent structure, along with new high-density driver chips that can accept big current, has allowed rohm to achieve print s peeds of 250mm/s with using thermal history control, the fastest in its class. 2) standard printheads in the line up are capable of 203 or 300 dpi. they achieve the high resolution needed for graphics and other complex print patterns. 3) one rank resistance value of 650 ? 3% eliminates the inconvenience of rank selection. 4) the required driving voltage of 3.15 to 5.25v allows wide range of power supply voltage setting. this also allows multiple choice of electronic components for printers. 5) 2-inch, 3-inch and 4-inch series are available. z dimensions (unit : mm) 65 56 (effective print width) 55 0.2 2 ? m3 (effective depth 3) 5 0.2 5.1 0.1 (10.2) dot #448 2.6 0.1 max.20 dot #1 connector b connector a no.15 no.1 no.1 no.15 5.1 0.4 4 0.2 20.0
kd2002-df10a printheads rev.a 2/4 z equivalent circuit z pin assignments no. 1vh vh vh vh do lat clk v dd stb1 stb2 stb3 gnd gnd gnd gnd 2 3 4 5 6 7 8 9 10 11 12 13 14 15 circuit connector a connector b no. 1 gnd gnd gnd gnd gnd tm tm stb5 di vsf vh vh vh 2 3 4 5 6 7 8 9 10 11 12 13 14 15 circuit stb6 stb4 v h gnd clk thermistor dot#1 dot#448 tm stb5 stb6 connector b 384 321 320 257 192 129 128 1 connector a shift register /lat di do v h gnd stb2 stb1 v dd 256 193 stb3 tm latch register v sf l/s v sf : driver output voltage stb: strobe (high active) /lat: latch clk: clock di: data in do: data out gnd: ground tm: thermisto r v sf : usually v sf and v h are connected. when measuring r value of heat- element, v sf and v h should be separated (page4, 7.(4)). 448 385 stb4 v h : print voltage 30k ? b: 3950k
kd2002-df10a printheads rev.a 3/4 z timing chart z characteristics effective printing width 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 parameter ? rave v h p o slt t on 56.0 0.125 448 650 24 0.79 0.5 0.19 448 16 20.0 50/5 10 7 5 to 45 mm mm dots ? v w/dot ms ms dots mhz mm km/pulses c symbol typical unit ? ? ? ? ? ? ? *if delay time for driver out can not be secured enough, there is a possibility that v h would fluctuate greatly. please design the circuit so that v h does not exceed peak voltage (vp). do(data out) clk(clock) /lat(latch) stb(strobe) di(data in) "high":black "low" :white "high": hold "low":through driver out "high":black "low" :white tw clk tsetup di thold di td do tsetup lat thold lat tw lat tsetup stb tdo tdo min.10sec*
kd2002-df10a printheads rev.a 4/4 z 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 : 1.25ms/line fig.4 representative density curve 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.5 maximum energy curve 0 20 40 60 80 100 120 140 160 180 ? 20 ? 10 10 30 50 70 0204060 temperature : ( c) resistance : (k ? ) fig.6 thermistor curve
notes no technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of rohm co.,ltd. the contents described herein are subject to change without notice. the specifications for the product described in this document are for reference only. upon actual use, therefore, please request that specifications to be separately delivered. application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. rohm co.,ltd. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by rohm co., ltd. is granted to any such buyer. products listed in this document are no antiradiation design. appendix1-rev2.0 thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact your nearest sales office. rohm customer support system the americas / eupope / asia / japan contact us : webmaster@ rohm.co. jp www.rohm.com copyright ? 2007 rohm co.,ltd. the products listed in this document are designed to be used with ordinary electronic equipment or de vices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of which would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. it is our top priority to supply products with the utmost quality and reliability. however, there is always a chance of failure due to unexpected factors. therefore, please take into account the derating characteristics and allow for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in order to prevent possible accidents that may result in bodily harm or fire caused by component failure. rohm cannot be held responsible for any damages arising from the use of the products under conditions out of the range of the specifications or due to non-compliance with the notes specified in this catalog. 21, saiin mizosaki- cho, ukyo-ku, kyoto 615-8585, japan tel : +81-75-311-2121 fax : +81-75-315-0172 appendix
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