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TDA9112A

HIGH-END I²C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITOR

STMicroelectronics 

TDA9112A

HIGH-END I²C CONTROLLED DEFLECTION PROCESSOR

FOR MULTISYNC MONITOR

FEATURES

General

• Advanced I2C-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 outputs

• I2C-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; I2C-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, I2C-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 configuration

• I2C-bus-controlled output voltage

• Synchronized on hor. frequency with phase

selection

• Selectable polarity of drive signal

• Protection at H unlock condition

DESCRIPTION

The 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 I2C bus-controlled compu-

ter display monitors to be built with a reduced

number of external components.

SDIP 32 (Shrink DIP package)

ORDER CODE: TDA9112A

October 2003

This is preliminary information on a new product now in development. Details are subject to change without notice.

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