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TDA9112
I2C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
Version 4.2
TDA9112LOW-COST I2 C CONTROLLED DEFLECTION PROCESSOR
FOR MUL TISYNC MONITOR
FEATURES
General ADVANCED I2 C BUS CONTROLLED
DEFLECTION PROCESSOR DEDICATED
FOR HIGH-END CRT MONITORS SINGLE SUPPLY VOLTAGE 12V VERY LOW JITTER DC/DC CONVERTER CONTROLLER ADVANCED EW DRIVE ADVANCED ASYMMETRY CORRECTIONS AUTOMATIC MULTISTANDARD
SYNCHRONIZATION 2 DYNAMIC CORRECTION WAVEFORM
OUTPUTS X-RAY PROTECTION AND SOFT-START &
STOP ON HORIZONTAL AND DC/DC DRIVE
OUTPUTSI2 C BUS STATUS REGISTER
Horizontal section 150 kHz maximum frequency Corrections of geometric asymmetry: Pin
cushion asymmetry, Parallelogram, separate
Top/Bottom corner asymmetry Tracking of asymmetry corrections with vertical
size and position Fully integrated horizontal moiré cancellation
Vertical section 200 Hz maximum frequency Vertical ramp for DC-coupled output stage with
adjustments of: C-correction, S-correction for
super-flat CRT, Vertical size, Vertical position Vertical moiré cancellation through vertical
ramp waveform Compensation of vertical breathing with EHT
variation
EW section Symmetrical geometry corrections: Pin cushion,
Keystone, Top/Bottom corners separately Horizontal size adjustment Tracking of EW waveform with Vertical size and position and adaptation to frequency Compensation of horizontal breathing through
EW waveform
Dynamic correction section Generates waveforms for dynamic corrections
like focus, brightness uniformity, ... 1 output with vertical dynamic correction
waveform 1 output with composite HV dynamic correction
waveform Fixed on screen by means of tracking system
DC/DC controller section Step-up and step-down conversion modes Internal and external sawtooth configurations Bus-controlled output voltage Synchronization on hor. frequency with phase
selection Selectable polarity of drive signal
DESCRIPTIONThe TDA9112 is a monolithic integrated circuit as-
sembled in a 32-pin shrink dual-in-line plastic
package. This IC controls all the functions related
to horizontal and vertical deflection in multimode
or multi-frequency computer display monitors.
The internal sync processor, combined with the
powerful geometry correction block, makes the
TDA9112 suitable for very high performance mon-
itors, using few external components.
Combined with other ST components dedicated
for CRT monitors (microcontroller, video preampli-
fier, video amplifier, OSD controller) the TDA9112
allows fully I2C bus-controlled computer display
monitors to be built with a reduced number of ex-
ternal components.
ORDERING INFORMATION
