Philips Semiconductors
Product specification
Economy Autosync Deflection Controller
(EASDC)
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 f
min
and f
max
by external
resistors
•
DC controllable wide range linear picture position
•
Soft start for horizontal driver.
ORDERING INFORMATION
TYPE
NUMBER
TDA4858
PACKAGE
NAME
SDIP32
DESCRIPTION
plastic shrink dual in-line package; 32 leads (400 mil)
GENERAL DESCRIPTION
Vertical section
TDA4858
•
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.
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.
VERSION
SOT232-1
1997 Oct 27
2
PHILIPS [ NXP SEMICONDUCTORS ]
