KF2004-GD45A
Printheads
1/4
Compact medium speed thick film
thermal printhead (8 dots / mm)
KF2004-GD45A
Using its expertise in LSI technology, ROHM has developed new high density driver chips for use in the KF2004-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.
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Applications
POS printers
ATM printers
KIOSK printers
Ticket printers
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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 800
3% eliminates the inconvenience of rank selection.
4) 2-inch, 3-inch and 4-inch series are available.
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External dimensions (Units : mm)
5.1
0.4
4
0.2
118
104 (EFFECTIVE PRINT WIDTH)
DOT #832
DOT #1
(7)
2.6
0.1
Max. 20
No.15
No.1
No.15
No.1
CONNECTOR B
CONNECTOR A
4
0.2
110
0.2
5.1
0.1
(10.2)
2-M3 (EFFECTIVE DEPTH 3)
Max.
20.0
KF2004-GD45A
Printheads
3/4
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Timing chart
"High":BLACK
"Low" :WHITE
"High":BLACK
"Low" :WHITE
CLOCK (CLK)
DATA IN (DI)
DATA OUT (DO)
LATCH (LAT)
STROBE (STB)
DRIVER OUT
"High":HOLD
"Low" :THROUGH
tw CLK
t hold DI
t setup DI
td DO
t setup LAT
t hold LAT
tw LAT
t setup STB
tdo
tdo
Fig.2
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Characteristics
Parameter
-
-
-
Rave
V
H
P
O
SLT
T
ON
-
-
-
-
-
104
0.125
832
800
24
0.61
1.25
0.275
448
8
20.0
50/5
10
7
5~45
mm
mm
dots
V
W/dot
ms
ms
dots
MHz
mm
km/pulses
C
Symbol
Typical
Unit
Operating temperature
Running life / pulse life
Maximum roller diameter
Maximum clock frequency
Maximum number of dots energized simultaneously
Pulse width
Print cycle
Applied power
Applied voltage
Average resistance value
Total dot number
Effective printing width
Dot pitch
KF2004-GD45A
Printheads
4/4
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Electrical characteristic curves
Paper : KF50-HDA (OJI)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
1
2
3
4
5
SCANNING LINE TIME (
ms/line)
ENERGY (
mJ/dot)
Fig.3 Adaptive speed chart
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0.00
0.05
0.10
0.15
0.20
0.25
0.30
ENERGY (
mJ/dot)
OPTICAL DENSITY
SLT : 1.25ms/line
Fig.4 Representative density curve
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
1
2
3
4
5
SCANNING LINE TIME (
ms/line)
ENERGY (
mJ/dot)
Fig.5 Maximum energy curve
0
20
40
60
80
100
120
140
160
180
-
20
-
10
10
30
50
70
0
20
40
60
TEMPERATURE : (
C)
RESISTANCE : (k
)
Fig.6 Thermistor curve
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