GENERAL DESCRIPTION
The TDA4858 is a high performance and efficient solution for autosync monitors. The concept is fully DC controllable and can be used in applications with a microcontroller and stand-alone in rock bottom solutions.
The TDA4858 provides synchronization processing, H + V synchronization with full autosync capability, and very short settling times after mode changes. External power components are given a great deal of protection. The IC generates the drive waveforms for DC-coupled vertical boosters such as TDA486x and TDA8351.
The TDA4858 provides extended functions e.g. as a flexible SMPS block and an extensive set of geometry control facilities, providing excellent picture quality.
Together with the Philips TDA488x video processor family a very advanced system solution is offered.

FEATURES
Concept features
• Full Horizontal (H) plus Vertical (V) autosync capability
• Completely DC controllable for analog and digital concepts
• Excellent geometry control functions [e.g. automatic correction of East-West (EW) parabola during adjustment of vertical size and vertical shift]
• Flexible Switched Mode Power Supply (SMPS) function block for feedback and feed forward converters
• X-ray protection
• Start-up and switch-off sequence for safe operation of all power components
• Very good vertical linearity
• Internal supply voltage stabilization
• SDIP32 package.

Synchronization inputs
• Can handle all sync signals (horizontal, vertical, composite and sync-on-video)
• Combined output for video clamping, vertical blanking and protection blanking
• Start of video clamping pulses externally selectable.

Horizontal section
• Extremely low jitter
• Frequency locked loop for smooth catching of line frequency
• Simple frequency preset of fmin and fmax by external resistors
• DC controllable wide range linear picture position
• Soft start for horizontal driver.

Vertical section
• Vertical amplitude independent of frequency
• DC controllable picture height, picture position and S-correction
• Differential current outputs for DC coupling to vertical booster.

EW section
• Output for DC adjustable EW parabola
• DC controllable picture width and trapezium correction
• Optional tracking of EW parabola with line frequency
• Prepared for additional DC controls of vertical linearity, EW-corner, EW pin balance, EW parallelogram, vertical focus by extended application.