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TDA9112A
LOW-COST I2C CONTROLLED DEFLECTION PROCESSOR FOR 19 INCH. MULTISYNC CRT MONITORS
October 2003 1/60
This is preliminary information on a new product now in development. Details are subject to change without notice.
TDA9112AHIGH-END I²C CONTROLLED DEFLECTION PROCESSOR
FOR MULTISYNC 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 outputs2 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 size and position prescales for factory
adjustment Vertical moiré cancellation through vertical
ramp waveform Compensation of vertical breathing with EHT
variation; I2 C-bus gain adjustment
EW section Symmetrical geometry corrections: Pin cushion,
Keystone, Top/Bottom corners separately, S-
and W-corrections Horizontal size adjustment Tracking of EW waveform with Vertical size and
position, horizontal size and frequency Compensation of horizontal breathing with EHT
variation, I2 C-bus gain adjustment
Dynamic correction section Generates waveforms for dynamic corrections
like focus, brightness uniformity, ... 1 output with vertical dynamic correction
waveform, both polarities, tracking with vertical
size and position 1 output with composite HV dynamic correction
waveform, both polarities, shape control on
horizontal waveform component, tracking with
horizontal size
DC/DC controller section Step-up and step-down conversion modes External sawtooth configuration2 C-bus-controlled output voltage Synchronized on hor. frequency with phase
selection Selectable polarity of drive signal Protection at H unlock condition
DESCRIPTIONThe TDA9112A is a monolithic integrated circuit
assembled 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.
Combined with other ST components dedicated
for CRT monitors (microcontroller, video preampli-
fier, video amplifier, OSD controller), the
TDA9112A allows fully I2 C bus-controlled compu-
ter display monitors to be built with a reduced
number of external components.
