KD2004-CF20A printheads 1/4 compact medium speed thick film thermal printhead (8dots / mm) KD2004-CF20A KD2004-CF20A is suitable for devices, such as high-speed pos 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 150 mm/s. the gk series is the thus ideal for label printers that need high printing rates. z applications pos terminals, label printers, cat terminals, multi-purpose small-sized printers z features 1) using a special compact partial glaze and new heating elem ent structure, achieves high-speed printing at 150 mm/s. 2) the use of the 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 heavier current can be applied. 4) one rank resistance value of 800 ? 3% eliminates the inconvenience of rank selection. 5) 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. z dimensions (unit : mm) dot #864 dot #1 40.2 5.10.4 118 (5) 2.60.1 1100.2 5.10.2 10.2 max.1.7 max.20 no.1 no.15 no.15 no.1 connector a connector b max. 20.0 40.2 108 (effective print width) 2-m3 (effective depth 3)
KD2004-CF20A printheads 2/4 z equivalent circuit v h thermistor 30k ? b : 3950k connector b gnd v dd clk do di #864 #721 #720 #577 #576 #433 #1 #144 #145 #288 #289 #432 latch register tm tm lat stb6 stb5 stb4 v h connector a gnd stb1 stb2 stb3 dot #864 dot #1 fig. 1 shift register z pin assignments connector a connector b v dd do lat no. 1v h v h v h v h clk stb2 gnd 2 3 4 5 6 7 8 9 10 11 12 13 15 circuit gnd 14 gnd gnd stb3 stb1 di no. 1 v h v h v h v h gnd 2 3 4 5 6 7 8 9 10 11 12 13 15 circuit gnd 14 gnd gnd gnd stb6 stb5 stb4 tm tm
KD2004-CF20A printheads 3/4 z timing chart clk (clock) t do t setup stb t hold lat t setup lat t hold di tw clk t setup di tw lat t do min.15 sec(v dd =5v)* min.30 sec(v dd =3.3v)* di (data in) "high" : black "low" : white do (data out) "high" : black "low" : white lat (latch) driver out fig.2 td do stb (strobe) "high" : hold "low" : through 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 108 0.125 864 800 24.0 0.59 0.83 0.32 432 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 ? ? ? ? ? ? ?
KD2004-CF20A printheads 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 : 1.00ms/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 / europe / asia / japan contact us : webmaster@ rohm.co. jp www.rohm.com copyright ? 2008 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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