TDA4850 Datasheet, PDF (2/20 Pages) NXP Semiconductors – Horizontal and vertical deflection controller for VGA/XGA and multi-frequency monitors

Philips Semiconductors
Horizontal and vertical deflection controller
for VGA/XGA and multi-frequency monitors
Product specification
TDA4850
FEATURES
• VGA operation fully implemented including
alignment-free vertical and E/W amplitude pre-settings
• 4th VGA mode easy applicable (XGA, Super VGA)
• Multi-frequency operation externally selectable
• All adjustments DC-controllable
• Alignment-free oscillators
• Sync separators for video or horizontal and vertical TTL
sync levels regardless of polarity
• Horizontal oscillator with PLL1 for sync and PLL2 for
flyback
• Constant vertical and E/W amplitude in multi-frequency
operation
• DC-coupling to vertical power amplifier (TDA486X or
TDA8351)
• Internal supply voltage stabilization with excellent ripple
rejection to ensure stable geometrical adjustments.
GENERAL DESCRIPTION
The TDA4850 provides economical solutions in VGA/XGA
and multi-frequency monitors. The IC incorporates the
complete horizontal and vertical small signal processing.
VGA-dependent mode detection and settings are
performed on chip. In conjunction with TDA486X or
TDA8351 (vertical output circuits) both ICs offer an
extremely advanced system solution.
QUICK REFERENCE DATA
SYMBOL
V_P
I_P
V_{i sync}
I_{o V}
I_{o H}
T_amb
PARAMETER
MIN.
supply voltage (pin 1)
9.2
supply current
−
AC-coupled composite video signal with negative-going sync −
(peak-to-peak value; pin 9)
sync slicing level
−
DC-coupled TTL-compatible horizontal sync signal
1.7
(peak value; pin 9)
slicing level
1.2
DC-coupled TTL-compatible vertical sync signal
1.7
(peak value; pin 10)
slicing level
1.2
vertical differential output current (peak-to-peak value;
−
pins 5 and 6)
horizontal sink output current on pin 3
−
operating ambient temperature
0
TYP.
12
40
1
120
−
1.4
−
1.4
1
−
−
MAX.
16
−
−
−
−
1.6
−
1.6
−
60
70
UNIT
V
mA
V
mV
V
V
V
V
mA
mA
°C
ORDERING INFORMATION
TYPE
NUMBER
TDA4850
NAME
DIP20
PACKAGE
DESCRIPTION
plastic dual in-line package; 20 leads (300 mil)
VERSION
SOT146-1
1997 Jun 05
2