NF2004-VA20A Printheads Hight Speed Thermal Printhead (8dots / mm) NF2004-VA20A The NF2004-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 Bar code label printers Ticket printers General purpose compact printers !Features 1) Standard glazed components to accommodate thick paper. 2) High speed clock to facilitate external heat history control. 3) Using a hard conductive film as a protective film on the heating element offers excellent resistance to electrostatic damage. 4) Compatible with the NF3004-VA20A (300dpi) 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) (6) Max. 48 Max.φ20 124±0.5 112 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 16±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. NF2004-VA20A Printheads !Characteristics Parameter Symbol Effective printing width Dot pitch Total dot number Average resistance value Rave Typical Unit 112 mm 0.125 mm 896 dots 800 Ω Applied voltage VH 24 V Applied power PO 0.61 dot Print cycle SLT 0.82 ms Pulse width TON 0.388 ms Maximum number of dots energized simultaneously 896 dots Maximum clock frequency 10 MHz Maximum roller diameter 20 mm Running life / pulse life 50 / 1 billion km / pulses Operating temperature 60 °C !Pin configuration HIROSE No. Circuit No. Circuit JST No. Circuit 1 GND 2 VDD 1 COM 3 DI2 4 CLK(CP) 2 COM 5 /LAT 6 /STB2 3 COM 7 NC 8 DI1 4 GND 9 /STB1 10 NC 5 GND 11 TM 12 TM 6 GND 13 SENS3 14 SENS2 15 SENS1 16 BEO 17 NC 18 NC 19 NC 20 NC 21 NC 22 NC 23 NC 24 NC 25 NC 26 NC NF2004-VA20A Printheads !Timing 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 NF2004-VA20A Printheads !Equivalent circuit DOT 896 DOT 1 VH GND BEO /STB2 /STB1 /LAT LATCH 896 641 640 449 448 193 192 DI 2 DI 1 CLK Vdd 0.1µF 50V GND TM TM DI No. DOT No. /STR No. DOT No. DI 2 896∼449 /STB2 896∼449 DI 1 448∼ 1 /STB1 448∼ Fig.2 1 1 NF2004-VA20A Printheads !Adaptation speed chart Adaptation speed chart 0 NB2004-VA20A 1 2 3 Inch/second[IPS] 4 5 6 7 Without external heat history control 8 9 10 OVER With external heat control !Data sheet OPTICAL DENSITY 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.10 0.15 0.20 0.25 0.30 0.32 0.50 180 0.45 160 RESISTANCE VALUE :(kΩ) SUPPLY ENERGY(MAX) (mJ / dot) 1.5 1.4 0.40 0.35 0.30 0.25 0.20 0.15 0.10 R25=30kΩ B=3950k 140 120 100 80 60 40 20 0.05 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 0 -10 0 10 20 30 40 50 60 ENERGY(mJ / dot) SCANNING LINE TIME(ms / line) TEMPERATURE : (°C) Fig. 3 Representative density curve Fig. 4 Maximum energy curve Fig. 5 Thermistor curve 70