ROHM KF2003

KF2003-GD45A
Printheads
Compact medium speed thick film
thermal printhead (8 dots / mm)
KF2003-GD45A
Using its expertise in LSI technology, ROHM has developed new high density driver chips for use in the KF2003-GD45A .
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. This high-speed and high-density printing answers the needs of POS, ATM,
KIOSK and ticket printing devices, which are increasingly being called upon to produce graphical output.
!Applications
POS printers
ATM printers
KIOSK printers
Ticket 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) Standard printheads in the line up are capable of 203 or 300 dpi. They achieve the high resolution needed for graphics
and other complex print patterns.
3) One rank resistance value of 800Ω ± 3% eliminates the inconvenience of rank selection.
4) 2-inch, 3-inch and 4-inch series are available.
!External dimensions (Units : mm)
65
5.1±0.4
56 (EFFECTIVE PRINT WIDTH)
4±0.2
DOT #1
Ma
x.φ
2
0.0
2.6±0.1
Max.20
DOT #448
NO.15
NO.1
NO.15
NO.1
5±0.2
55±0.2
5.1±0.1
(10.2)
CONNECTOR B
CONNECTOR A
2−M3 (EFFECTIVE DEPTH 3)
1/4
KF2003-GD45A
Printheads
!Equivalent circuit
12,13,14,15
VH
DOT #640
DOT #1
1,2,3,4, 5
GND
5
4
3
2
1,2,3,4
VH
12,13,14,15
GND
9
STB1
1
STB5
9
10
STB2
STB4
8
11
STB3
LATCH REGISTER
11
DI
SHIFT REGISTER
NC
10
TM
6
TM
7
6
LAT
5
7
DO
CLK
8
VDD
THERMISTOR
30kΩ B3950
CONNECTOR B
CONNECTOR A
Fig.1
!Pin assignments
CONNECTOR A
No.
Circuit
CONNECTOR B
No.
Circuit
1
VH
1
GND
2
VH
2
GND
3
VH
3
GND
4
VH
4
GND
5
DO
5
GND
6
LAT
6
TM
7
CLK
7
TM
8
VDD
8
STB4
9
STB1
9
STB5
10
STB2
10
N.C.
11
STB3
11
DI
12
GND
12
VH
13
GND
13
VH
14
GND
14
VH
15
GND
15
VH
2/4
KF2003-GD45A
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
Parameter
Symbol
Typical
Unit
Effective printing width
−
80
mm
Dot pitch
−
0.125
mm
−
640
dots
Rave
800
Ω
Total dot number
Average resistance value
Applied voltage
VH
24
V
Applied power
PO
0.63
W/dot
Print cycle
SLT
1.25
ms
Pulse width
TON
0.275
ms
Maximum number of dots energized simultaneously
−
384
dots
Maximum clock frequency
−
8
MHz
Maximum roller diameter
−
φ20
Running life / pulse life
−
50/5×10
Operating temperature
−
5~45
mm
7
km/pulses
°C
3/4
KF2003-GD45A
Printheads
!Electrical characteristic curves
0.8
0.6
1.4
0.5
0.4
0.3
0.2
SLT : 1.25ms/line
0.7
0.6
ENERGY (mJ/dot)
1.6
OPTICAL DENSITY
ENERGY (mJ/dot)
0.8
1.8
Paper : KF50-HDA (OJI)
0.7
1.2
1.0
0.8
0.6
1
2
3
4
5
SCANNING LINE TIME (ms/line)
0.0
0.00
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
0.4
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