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KF2003-GF50A
Printheads
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)
MAX.16.5
80
Max.1.7 Dot #1
2.10.3
72 (Effective Print Width) Dot #576
(11.35)
(1.1)
Exposed Conductor Side
(14)
No.28
No.1
ax .
14 .0
Insert Direction
Connector
M
1/4
KF2003-GF50A
Printheads
!Equivalent circuit
VH L-GND P-GND 1,2,3,26,27,28 18 13,14,15,16,17 9 22 21 8 7 2 1 DOT #576 DOT #1
STB5 STB4
STB1 AEO2 AEO1 LAT
8 20 19 5 LATCH REGISTER
DI CLK DO VDD NC TM TM
25 6 4 7 23,24 11 12 THERMISTOR 30k B:3950 SHIFT REGISTER
Fig.1
!Pin assignments
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Circuit VH VH VH DO LAT CLK VDD STB1 STB2 STB3 TM TM P-GND P-GND No. 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Circuit P-GND P-GND P-GND L-GND AEO1 AEO2 STB4 STB5 NC NC DI VH VH VH
L-GND : LOGIC GROUND P-GND : POWER GROUND
2/4
KF2003-GF50A
Printheads
!Timing chart
tw CLK CLOCK (CLK)
t setup DI DATA IN (DI) "High":BLACK "Low" :WHITE DATA OUT (DO) "High":BLACK "Low" :WHITE
t hold DI
td DO
t setup LAT LATCH (LAT) "High":HOLD "Low" :THROUGH tw LAT STROBE (STB)
t hold LAT
t setup STB
AEO
tdo DRIVER OUT
tdo
Fig.2
!Characteristics
Parameter 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 Symbol - - - Rave VH PO SLT TON - - - - - Typical 72 0.125 576 123 3.6 0.07 2.50 2.02 64 8 14.0 50/1x10 0~50
8
Unit mm mm dots V W/dot ms ms dots MHz mm km/pulses C
3/4
KF2003-GF50A
Printheads
!Electrical characteristic curves
0.8 Paper : KF50-HDA (OJI) 0.7 0.6
ENERGY (mJ/dot)
OPTICAL DENSITY
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 1.8 SLT : 2.50ms/line
0.8 0.7 0.6
ENERGY (mJ/dot)
0.5 0.4 0.3 0.2 0.1 0 0 1 2 3 4 5
0.5 0.4 0.3 0.2 0.1
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
180 160 140
RESISTANCE : (k)
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

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