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PDF L6452 Data sheet ( Hoja de datos )
| Número de pieza | L6452 | |
| Descripción | DUAL 13X16 MATRIX HEAD INK JET DRIVER | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de L6452 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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® L6452
DUAL 13X16 MATRIX HEAD INK JET DRIVER
DRIVES TWO 13X16 MATRIX HEADS
HEAD TEMPERATURE SENSING
POWER UP SYSTEM
ELECTRICAL NOZZLE CHECK
8 BIT A/D
5 BIT D/A
± 4KV ESD PROTECTED OUTPUTS
DESCRIPTION
L6452 is a device designed to drive two 13x16
matrix ink jet printheads in printer applications.
The output stage is able to source simultaneously
400 mA on each of the 16 power lines (columns)
with a duty cycle of 33% in normal printing and
66% in head pre-heating. On the address lines
(rows), the load is only capacitive (MOS FET driv-
ing capability). The driver can control two print-
heads, but only one is active at a time. The ad-
dress scanning counter is included and can be
disabled to allow a different scanning scheme.
Figure 1. Block Diagram
PQFP100
In order to avoid output activation during the sup-
ply transient, an internal power-up system is im-
plemented.
As supporting function, L6452 is capable of sens-
ing the head silicon temperature and to electri-
cally check each nozzle.
The device is also integrating a thermal protec-
tion.
POWER &
LOGICAL
SUPPLIES
CONTROL
LINES
A/D & PRINT HEAD
TEMPERATURE
CONTROL LINES
16 POWER LINES
PRINT HEAD
DRIVER
13 ADDRESS LINES
CHANNEL A
PRINT HEAD
A
13 ADDRESS LINES
CHANNEL B
PRINT HEAD
B
PRINT HEAD
TEMPERATURE
CONTROL
ANALOG
INPUTS
D97IN523
March 1999
1/16
1 page  
Figure 3. Block Diagram: Power Line Output Stage.
L6452
DATA BIT 0
1
0
FROM 16 BIT
DATA LATCH
DATA BIT 1
DATA BIT 15
*LONG PULSE
* SHORT PULSE
NOZZLE CHECK ENABLE
10mA
POWER SUPPLY
OUTPUT 0
OUTPUT 1
D97IN525
OUTPUT 15
TRIGGER
NOZZLE CHECK OUTPUT
5/16
5 Page 
L6452
Figure 5. Control Register details.
SHIFT DIRECTION
CR9 CR8 CR7 CR6 CR5 CR4 CR3 CR2 CR1 CR0
A/B ON/OFF DA4 DA3 DA2 DA1 DA0 S2 S1 S0
SELECTION OF RESISTOR A
(A/B = 0) or B
(A/B = 0) for
TEMPERATURE MEASUREMENT
D/A INPUTS FOR OFFSET
COMPENSATION
DA0 = LSB
DA4 = MSB
POSITIVE LOGIC
SWITCHES THE CURRENT SOURCE ON or OFF;
LINKED WITH ONENABLE INPUT PIN
ON/OFF
0
1
0
1
ONENABLE
1
1
0
0
ACTION
OFF
OFF
OFF
ON
CHANNEL SELECTION
A/D INPUT
D97IN534A
ONE INTERNAL CHANNEL
(VX MEASUREMENT)
FIVE UNCOMMITTED, GENRAL-PURPOSE
EXTERNAL CHANNELS
S2 S1 S0
000
001
010
011
100
101
110
111
SELECTED CHANNEL
0 (INTERNAL)
1 (EXTERNAL)
2 (EXTERNAL)
3 (EXTERNAL)
4 (EXTERNAL)
5 (EXTERNAL)
6
7
CH0 BUF
A
B
B
B
B
B
C
D
Figure 6. CR Latch Timings
CRDATA
DA0 S2 S1 S0
CRCLOCK
CRLATCH
CONVSTART
Figure 7. A/D Converter Timings
tls tlhigh
tlconv
D97IN535
CONVSTART
ADCK
ADDATA HIGH IMPEDANCE
tcscks
tcsckh
7
tckout
6
5
43 2 10
HIGH IMPEDANCE
D97IN536
tcsx
11/16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet L6452.PDF ] | |
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