Compact medium speed thick film thermal printhead(8dots / mm)
KD2008-CG50A
KD2008-CG50A is suitable for devices,such as high-speed POS and label printer applications, that require thermal
printheads capable of higher printing rates. Improved power circuit design means that with heavier current it is possible
to print at speeds as high as 125 mm/s. The GK Series is the thus ideal for label printers that need high printing rates.
Applications
POS terminal printers
Label printers
CAT printers
General purpose compact printers
Features
1) Using a special compact partial glaze and new heating element structure, achieves high-speed printing at 125 mm/s.
2) The use of the newly developed highly-durable conductive protective film has improved countermeasures against
static electricity.
3) The VH and GND sections of the power circuitry have been strengthened so that heavier current can be applied.
4) Ultra small connectors, designed to conform with FFCs, and miniature driver chips have been used.
Although the resulting printheads are surprisingly compact and lightweight, they can be used with large platens of up
to 20 mm in diameter.
5) One rank resistance value of 8003% eliminates the inconvenience of rank selection.
Dimensions (Units : mm)
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2010 ROHM Co., Ltd. All rights reserved.
2010.02 - Rev.A
S
S
S
S
1
KD2008-CG50A
Data Sheet
Inner circuit
VH
GND
TB4
TB3
TB2
TB1
LAT
CLK
DI1
DO1
DI2
DO2
DD
V
TM
TM
CONNECTOR
Pin configuration
No.
10
11
12
13
14
Circuit
1VH
2
3
4
5
6
7
8
9
VH
VH
DO2
DI2
CLK
LAT
STB1
STB2
TM
GND
GND
GND
GND
DOT #1728 DOT #
121110987654321
LATCH REGISTER LATCH REGISTER
SHIFT REGISTER
THERMISTOR
30kΩ B:3950
144 OUTPUTS EACH
SHIFT REGISTER
Fig. 1
No.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Circuit
GND
GND
GND
GND
TM
V
DD
STB3
STB4
DO1
DI1
VH
VH
VH
VH
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2010 ROHM Co., Ltd. All rights reserved.
2010.02 - Rev.A
KD2008-CG50A
Timing chart
CLOCK(CLK)
DATA IN(DI)
High: BLACK
Low : WHITE
DATA OUT(DO)
High: BLACK
Low : WHITE
Data Sheet
tw CLK
t setup DI t hold DI
td DO
LATCH(LAT)
High: HOLD
Low : THROUGH
STROBE(STB)
DRIVER OUT
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
t setup LAT
tw LAT t setup STB
t hold LAT
tdo tdo
Symbol Typ. Unit
−
−
−
Rave
V
H
P
O
SLT
ON
T
−
−
−
−
−
216
0.125
1728
800
24
0.5
1
0.4
432
5
20
50 / 5×10
5∼45
7
mm
mm
dots
Ω
V
W / dot
ms
ms
dots
MHz
mm
km / pulses
°C
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2010 ROHM Co., Ltd. All rights reserved.
2010.02 - Rev.A
Fig.6 Thermistor curve
.7
KD2008-CG50A
Electrical characteristic curves
0.8
0.7
0.6
0.5
mJ/dot)
0.4
0.3
ENERGY (
0.2
0.1
0
012345
SCANNING LINE TIME (
Fig.3 Adaptive speed chart
180
160
140
120
100
80
60
RESISTANCE : (kΩ )
40
20
0
20 10 10 30 50 700204060
Paper : KF50-HDA (OJI)
TEMPERATURE :
ms/line)
(°C)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
OPTICAL DENSITY
0.4
0.2
0.0
0.00 0.05 0.10 0.15 0.20 0.25 0.30
ENERGY (
Fig.4 Representative density curve
SLT : 1.00ms/line
mJ/dot)
0.45
0.4
0.35
0.3
mJ/dot)
0.25
0.2
0.15
ENERGY (
0.1
0.05
0
0 0.5 1 1.5 2 2.5 2
SCANNING LINE TIME (
Fig.5 Maximum energy curve
Data Sheet
ms/line)
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2010 ROHM Co., Ltd. All rights reserved.
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Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specied herein is subject to change for improvement without notice.
The content specied herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specied in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specied herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
Notice
The Products specied in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, ofce-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specied in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, re or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, re control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
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