DESCRIPTION
The TDA9109/SN is a monolithic integrated circuit assembledin 32-pinshrink dual in line plastic package. This IC controls all the functionsrelated to the horizontal and vertical deflection in multimode or multi-frequency computer display monitors.
Theinternalsyncprocessor,combinedwith the very powerful geometry correction block make the TDA9109/SN suitable for very high performance monitors, using very few external components.
The horizontaljitter levelisverylow. It is particularly well suited for high-end 15” and 17” monitors.
Combined with the ST7275 Microcontroller family, TDA9206 (Video preamplifier) and STV942x (On-Screen Display controller) the TDA9109/SN allows fully I2C bus controlled computer display monitors to be built with a reduced number of external components.

HORIZONTAL
■ SELF-ADAPTATIVE
■ DUAL PLL CONCEPT
■ 150kHz MAXIMUM FREQUENCY
■ X-RAY PROTECTION INPUT
■ I2C CONTROLS : H-POSITION, FREQUENCY GENERATORFORBURN-IN MODE

VERTICAL
■ VERTICAL RAMP GENERATOR
■ 50 TO 185Hz AGC LOOP
■ GEOMETRY TRACKING WITH VPOS & VAMP
■ I2C CONTROLS : VAMP, VPOS, S-CORR, C-CORR
■ DC BREATHING COMPENSATION

I2C GEOMETRY CORRECTIONS
■ VERTICAL PARABOLA GENERATOR (Pin Cushion - E/W, Keystone, Corner)
■ HORIZONTAL DYNAMIC PHASE (Side Pin Balance & Parallelogram)
■ VERTICAL DYNAMIC FOCUS (Vertical Focus Amplitude)

GENERAL
■ SYNC PROCESSOR
■ 12V SUPPLY VOLTAGE
■ 8V REFERENCE VOLTAGE
■ HOR. & VERT. LOCK/UNLOCK OUTPUTS
■ READ/WRITE I2C INTERFACE
■ HORIZONTAL AND VERTICAL MOIRE
■ B+ REGULATOR
   - INTERNAL PWM GENERATOR FOR B+ CURRENT MODE STEP-UP CONVERTER
   - SOFT START
   - I2C ADJUSTABLEB+ REFERENCE VOLTAGE
   - OUTPUT PULSES SYNCHRONIZED ON HORIZONTAL FREQUENCY
   - INTERNALMAXIMUMCURRENTLIMITATION
■ COMPARED WITH THE TDA9109, THE TDA9109/SN HAS :
   - CORNER CORRECTION,
   - HORIZONTAL MOIRÉ,
   - B+ SOFT START,
   - INCREASED MAX.VERTICALFREQUENCY,
   - NO HORIZONTAL FOCUS,
   - NO STEPDOWNOPTIONFOR DC/DC CONVERTER,
   - NO I2C FREE RUNNING ADJUSTMENT,
   - FIXED HORIZONTAL DUTY CYCLE (48%),
   - INCREASED MAXIMUM STORAGE TIME OF THE HORIZONTAL SCANNING TRANSISTOR.