NF3004-VA20A Printheads Hight Speed Thermal Printhead (300DPI ; dots / inch) NF3004-VA20A The NF3004-VA20A is a flat thin film thermal printhead that supports medium speed and high speed printing, suited for general purpose compact printers as well as label printers. !Applications High definition bar code label printers High definition ticket printers General purpose compact printers !Features 1) High definition of 300 dots / inch. 2) Standard glazed components to accommodate thick paper. 3) High speed clock to facilitate external heat history control. 4) Using a hard conductive film as a protective film on the heating element offers excellent resistance to electrostatic damage. 5) Compatible with the NF2004-VA20A (8dots / mm) in mechanical specifications, to facilitate the making of a series of printers. !External dimensions (Units : mm) DOT No.1 6±0.2 (26) Min. 4.3 (3.5) (7.792) Max. 48 Max.φ20 124±0.5 108.4 Max.5 #2 TYPE OF PRINTHEAD #26 #6 #25 JST B6PS-VH #1 HIROSE HIF3FC-26PA-2.54DS Max.10 #1 3-M3 EFFECTIVE DEPTH 3 100±0.2 2.8±0.2 7.3±0.3 17.8±0.2 (21.3) 25±0.5 (36) 10±0.2 14.208±0.2 φ3 H10 EFFECTIVE DEPTH 3 φ3 H10 LENGTH 4 EFFECTIVE DEPTH 3 40±0.3 (22) 80±0.3 DOT No.1 Note: No heat history control function inside the thermal printhead. External heat history control is required for high speed printing. NF3004-VA20A Printheads !Characteristics Parameter Symbol Typical Unit Effective printing width - 108.4 mm Dot pitch - 0.0847 mm - 1280 dots Rave 1250 Ω Total dot number Average resistance value Applied voltage VH 24 V Applied power PO 0.41 W / dot Print cycle SLT 0.83 ms Pulse width TON 0.28 ms Maximum number of dots energized simultaneously - 1280 dots Maximum clock frequency - 10 MHz Maximum roller diameter - 20 mm 8 Running life / pulse life - 50 / 10 km / pulses Operating temperature - 60 ˚C !Pin configuration HIROSE JST No. Circuit No. Circuit No. Circuit 1 GND 2 VDD 1 COM 3 DI 2 4 CLK (CP) 2 COM 5 /LAT 6 /STB 2 3 COM 7 NC 8 DI 1 4 GND 9 /STB 1 10 NC 5 GND 11 TM 12 TM 6 GND 13 SENS 3 14 SENS 2 15 SENS 1 16 BEO 17 NC 18 NC 19 NC 20 NC 21 NC 22 NC 23 NC 24 NC 25 NC 26 NC NF3004-VA20A Printheads !Taiming chart Min. 45ns CLK Min. 30ns Min. 10ns DI BEO CLK Min. 100ns Min. 50ns /LAT Min. 100ns Min. 300ns /STBn DRIVER OUT Max. 12.5µs Fig.1 Max. 12.5µs NF3004-VA20A Printheads !Equivalent circuit DOT #1280 DOT #1 VH GND BED /STB2 /STB1 /LAT LATCH 1280 961 960 641 640 321 DI 2 DI 1 CLK VDD 0.1µF 50V GND TM TM DI No. DOT No. /STB No. DOT No. DI 2 1280~641 /STB2 1280~641 DI 1 640~1 /STB1 640~1 Fig.2 320 1 NF3004-VA20A Printheads !Adaptation speed chart Inch / second [IPS] 0 1 2 3 4 5 6 Without external heat history control 7 8 9 10 OVER With external heat history control !Data sheet 1.5 1.4 1.0 0.8 0.6 0.4 0.2 0.050 0.075 0.100 0.125 ENERGY (mJ / dot) Fig. 3 Representative density curve R25=30kΩ B=3950k 160 0.22 RESISTANCE VALUE : (kΩ) SUPPLY ENERGY (MAX) (mJ / dot) OPTICAL DENSITY 1.2 0.0 180 0.24 0.20 0.18 0.16 0.14 0.12 0.10 0.08 0.06 0.04 140 120 100 80 60 40 20 0.02 0.00 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 SCANNING LINE TIME (ms / line) Fig. 4 Maximum energy curve 0 -10 0 10 20 30 40 50 60 TEMPERATURE : (˚C) Fig. 5 Thermistor curve 70