Philips TDA4855 free download

File name Tda4855.pdf

INTEGRATED CIRCUITS DATA SHEET TDA4855 Autosync Deflection Controller (ASDC) Preliminary specification File under Integrated Circuits, IC02 1996 Jul 18 Philips Semiconductors Preliminary specification Autosync Deflection Controller (ASDC) 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 · Horizontal focus parabola with amplitude control · 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. 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 TDA4855 · Vertical amplitude independent of frequency · Automatic correction of picture height for VGA350 and VGA400 modes · 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 with smoothed top · 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. GENERAL DESCRIPTION The TDA4855 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 TDA4855 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 TDA4855 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. 1996 Jul 18 2 Philips Semiconductors Preliminary specification Autosync Deflection Controller (ASDC) QUICK REFERENCE DATA SYMBOL VCC ICC HPOS VAMP VPOS VSCOR VEWPAR VEWWID VEWTRP Tamb supply voltage supply current horizontal shift adjustment range vertical siz