KF2003-GF50A printheads 1/4 compact low voltage thick film thermal printhead (8dots / mm) KF2003-GF50A a world first, rohm offers the KF2003-GF50A 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) insert direction exposed conductor side (11.35) (1.1) max.1.7 2.1 0.3 (14) 80 72 (effective print width) max. 14.0 max.16.5 no.28 no.1 connector dot #1 dot #576
KF2003-GF50A printheads 2/4 ! ! ! ! equivalent circuit vh l-gnd p-gnd stb5 stb4 stb1 aeo2 aeo1 di clk lat v dd do nc tm tm 1,2,3,26,27,28 13,14,15,16,17 dot #576 dot #1 18 22 21 8 5 20 19 25 6 latch register thermistor 30k ? b:3950 4 7 23,24 11 12 fig.1 shift register 987 21 ! ! ! ! pin assignments no. 1vh vh vh do clk v dd stb1 stb2 stb3 tm tm p-gnd p-gnd 2 3 4 5 6 7 8 9 10 11 12 13 14 circuit lat no. p-gnd l-gnd : logic ground p-gnd : power ground p-gnd p-gnd l-gnd di nc nc vh vh vh 15 16 17 18 19 20 21 22 23 24 25 26 27 28 circuit aeo1 aeo2 stb4 stb5
KF2003-GF50A 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 aeo ! ! ! ! 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 72 0.125 576 123 3.6 0.07 2.50 2.02 64 8 14.0 50/1 10 8 0~50 mm mm dots ? v w/dot ms ms dots mhz mm km/pulses c symbol typical unit ? ? ? ? ? ? ?
KF2003-GF50A 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
|
