KF2002-GP10A printheads 1/4 compact low voltage thick film thermal printhead (8dots / mm) KF2002-GP10A a world first, rohm offers the KF2002-GP10A of thermal printheads that allow operation using a single standard lithium ion battery: required voltage has been reduced to just 2.7v. compact and lightweight they are ideal printheads for handheld printers and pdas (personal digital assistants). ! ! ! ! applications mobile printers fet-pos printers hand-held printers debit printers ! ! ! ! features 1) using advanced lsi technology, rohm has developed a dedicated low voltage driver chip. compared with previous products, power consumption has been reduced by more than 30%. because the print head circuits draw just 2.7 volts, the printer can be driven using a single lithium ion battery. 2) one rank resistance value of 123 ? 4% eliminates the inconvenience of rank selection. 3) the gp10 series has a resistance value of 123 ? and can be used in devices designed to operate with a single 3v lithium ion battery. ! ! ! ! external dimensions (units : mm) (1.1) max.1.7 (7.35) exposed conductor side insert direction (10) max. 8.0 1.4 0.3 max.12.5 no.21 no.1 connector 54 48 (effective print width) dot #1 dot #384
KF2002-GP10A printheads 2/4 ! ! ! ! equivalent circuit vh l-gnd v dd stb6 stb5 stb4 stb3 stb2 stb1 di clk lat do tm tm dot #384 dot #1 thermistor 30k ? b:3950 fig.1 6 5 4 2 3 1 latch register shift register ! ! ! ! pin assignments no. 12 v dd stb4 stb5 stb6 gnd gnd clk di vh vh 13 14 15 16 17 18 19 20 21 circuit lat no. 1vh vh do gnd gnd stb1 stb3 tm 2 3 4 5 6 7 8 9 10 11 circuit tm stb2 note) the gnd terminal 5 and 6 are not connected with the gnd terminal 16 and 17. these terminals shall be connected each other at the closest point to the printhead.
KF2002-GP10A printheads 3/4 ! ! ! ! timing chart clock (clk) data in (di) data out (do) latch (lat) "high":hold "low" :through "high":black "low" :white "high":black "low" :white 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 fig.2 ! ! ! ! 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 48 0.125 384 123 3.6 0.07 2.5 2.01 64 8 8.0 50/1 10 8 0~50 mm mm dots ? v w/dot ms ms dots mhz mm km/pulses c symbol typical unit ? ? ? ? ? ? ?
KF2002-GP10A printheads 4/4 ! ! ! ! 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 : 2.50ms/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
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