L6452 Datasheet, PDF (1/16 Pages) STMicroelectronics – DUAL 13X16 MATRIX HEAD INK JET DRIVER

®
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