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 preamplifier, video amplifier, OSD controller), the TDA9112A allows fully I2C bus-controlled computer display monitors to be built with a reduced number of external components.

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 secti

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