KF1502-GT10A Printheads Compact low voltage thick film thermal printhead (6dots / mm) KF1502-GT10A These compact, lightweight printheads have low power requirements and are intended for ECR and mobile applications. Drawing 7.2V, a maximum print speed of 2 inches per second is possible. !Applications ECR printers Hand-held printers !Features 1) A wide range of power supply voltage, from 4.2V-8.5V, can be used to drive the printhead. This gives the flexibility for use with printers designed to operate with power from various battery configurations. 2) To allow the design of compact printers for use in calculators and other mobile applications, the basic specifications of the unit have been standardized. This gives engineers greater freedom to develop mechanical designs. 3) One rank resistance value of 210Ω ± 4% eliminates the inconvenience of rank selection. !External dimensions (Units : mm) 54 Dot #288 (1.1) Dot #1 No.1 M No.15 ax .φ 8. 0 (10) 1.4±0.3 10±0.3 48 (Effective Print Width) 1.0mm×14=14.0mm Connector 1/4 KF1502-GT10A Printheads !Equivalent circuit VH DOT #288 DOT #1 2 1 GND VDD STB2 STB1 LAT DI CLK LATCH REGISTER SHIFT REGISTER N.C. Fig.1 !Pin assignments No. Circuit 1 VH 2 VH 3 LAT 4 N.C. 5 GND 6 GND 7 STB1 8 VDD 9 STB2 10 GND 11 GND 12 CLK 13 DI 14 VH 15 VH 2/4 KF1502-GT10A Printheads !Timing chart tw CLK CLOCK (CLK) t setup DI t hold DI DATA IN (DI) "High":BLACK "Low" :WHITE td DO DATA OUT (DO) "High":BLACK "Low" :WHITE t setup LAT t hold LAT LATCH (LAT) "High":HOLD "Low" :THROUGH tw LAT t setup STB STROBE (STB) tdo tdo DRIVER OUT Fig.2 !Characteristics Symbol Typical Unit Effective printing width − 48.096 mm Dot pitch − 0.167 mm − 288 dots Rave 210 Ω Parameter Total dot number Average resistance value Applied voltage VH 7.2 V Applied power PO 0.14 W/dot Print cycle SLT 2.5 ms Pulse width TON 1.68 ms Maximum number of dots energized simultaneously − 144 dots Maximum clock frequency − 4 MHz Maximum roller diameter − φ8.0 Running life / pulse life − 30/5×10 km/pulses Operating temperature − 5~45 °C mm 7 3/4 KF1502-GT10A Printheads !Electrical characteristic curves 0.8 0.8 1.8 Paper : KF50-HDA (OJI) 0.7 1.4 0.5 0.4 0.3 0.6 ENERGY (mJ/dot) OPTICAL DENSITY 0.6 ENERGY (mJ/dot) SLT : 2.50ms/line 1.6 0.7 1.2 1.0 0.8 0.6 0.5 0.4 0.3 0.2 0.4 0.2 0.1 0.2 0.1 0 0 1 2 3 4 5 0.0 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0 0 1 2 3 4 5 SCANNING LINE TIME (ms/line) ENERGY (mJ/dot) SCANNING LINE TIME (ms/line) Fig.3 Adaptive speed chart Fig.4 Representative density curve Fig.5 Maximum energy curve 180 160 RESISTANCE : (kΩ) 140 120 100 80 60 40 20 0 −20 −10 0 10 20 30 40 50 60 70 TEMPERATURE : (°C) Fig.6 Thermistor curve 4/4