KF3004-GD31A Printheads Compact high speed thick film thermal printhead (12 dots / mm) KF3004-GD31A Using its expertise in LSI technology, ROHM has developed new high density driver chips for use in the KF3004-GD31A . Capable of being employed for both thermal and thermal transfer printing, with a print speed of 200mm/s, the resulting print heads are the fastest in their class. The high-speed and high-density printing answers the needs of ATM, kiosk and ticket printing devices, which are increasingly being called upon to produce graphical output. !Applications Label printers Ticket printers Terminal printers !Features 1) The use of a special partial glaze and the latest heating element structure, along with new high-density driver chips that can accept big current, has allowed ROHM to achieve print speeds of 200mm/s with using thermal history control, the fastest in its class. 2) One rank resistance value of 1250Ω ± 3% eliminates the inconvenience of rank selection. 3) 2-inch, 3-inch and 4-inch series are available. !External dimensions (Units : mm) 118 108.416 (EFFECTIVE PRINT WIDTH) DOT #1 φ1 8.0 2.6±0.1 Max. 20 DOT #1280 5.1±0.4 4±0.2 No.15 No.1 No.15 No.1 CONNECTOR A 4±0.2 110±0.2 5.1±0.1 (10.2) CONNECTOR B 2-M3 (EFFECTIVE DEPTH 3) 1/4 KF3004-GD31A Printheads !Equivalent circuit DOT #1280 VH DOT #1 VH GND GND 10 VDD 9 8 7 6 5 4 3 2 1 STB1 STB4 STB2 STB3 LAT LATCH REGISTER DI2 SHIFT REGISTER DO2 TM CLK DO1 DI1 SHIFT REGISTER THERMISTOR 30kΩ B:3950 TM CONNECTOR B CONNECTOR A STB No. Dot No. dots / STB DI No. Dot No. dots / STB 1 1 ∼ 384 384 1 1 ∼ 640 640 2 385 ∼ 640 256 2 640 ∼ 1280 640 3 641 ∼ 896 256 4 897 ∼ 1280 384 Fig.1 2/4 KF3004-GD31A Printheads !Pin assignments CONNECTOR B CONNECTOR A No. Circuit No. Circuit 1 GND 1 VH 2 GND 2 VH 3 GND 3 VH 4 GND 4 VH 5 STB3 5 DI1 6 STB4 6 DO1 7 VDD 7 LAT 8 TM 8 CLK 9 TM 9 STB1 10 DO2 10 STB2 11 DI2 11 GND 12 VH 12 GND 13 VH 13 GND 14 VH 14 GND 15 VH 15 GND !Timing chart tw CLK CLOCK (CLK) t setup DI DATA IN (DI) "High":BLACK "Low" :WHITE t hold DI td DO DATA OUT (DO) "High":BLACK "Low" :WHITE t hold LAT t setup LAT LATCH (LAT) "High":HOLD "Low" :THROUGH tw LAT t setup STB STROBE (STB) tdo tdo DRIVER OUT Fig.2 3/4 KF3004-GD31A Printheads !Characteristics Symbol Typical Unit Effective printing width − 108.416 mm Dot pitch − 0.0847 mm Total dot number − 1280 dots Rave 1250 Ω VH 24 V Parameter Average resistance value Applied voltage Applied power PO 0.40 W/dot Print cycle SLT 0.83 ms Pulse width TON 0.324 ms Maximum number of dots energized simultaneously − 640 dots Maximum clock frequency − 8 MHz Maximum roller diameter − φ18.0 Running life / pulse life − 50/5×10 km/pulses Operating temperature − 5~45 °C mm 7 !Electrical characteristic curves 0.8 0.8 1.8 1.6 0.6 1.4 0.5 0.4 0.3 0.2 SLT : 0.82ms/line 0.7 0.6 ENERGY (mJ/dot) 0.7 OPTICAL DENSITY ENERGY (mJ/dot) Paper : KF50-HDA (OJI) 1.2 1.0 0.8 0.6 0 0 1 2 3 4 5 SCANNING LINE TIME (ms/line) 0.05 0.10 0.15 0.20 0.25 0.30 ENERGY (mJ/dot) Fig.3 Adaptive speed chart 0.3 0.1 0.2 0.0 0.00 0.4 0.2 0.4 0.1 0.5 Fig.4 Representative density curve 0 0 1 2 3 4 5 SCANNING LINE TIME (ms/line) 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 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document use silicon as a basic material. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.0