1997 Jun 05

2

Philips Semiconductors

Product specification

Horizontal and vertical deflection controller

for VGA/XGA and multi-frequency monitors

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

ORDERING INFORMATION

SYMBOL

PARAMETER

MIN.

TYP.

MAX.

UNIT

supply voltage (pin 1)

9.2

12

16

V

supply current

−

40

−

mA

AC-coupled composite video signal with negative-going sync

(peak-to-peak value; pin 9)

−

1

−

V

sync slicing level

−

120

−

mV

DC-coupled TTL-compatible horizontal sync signal

(peak value; pin 9)

1.7

−−

V

slicing level

1.2

1.4

1.6

V

DC-coupled TTL-compatible vertical sync signal

(peak value; pin 10)

1.7

−−

V

slicing level

1.2

1.4

1.6

V

vertical differential output current (peak-to-peak value;

pins 5 and 6)

−

1

−

mA

horizontal sink output current on pin 3

−−

60

mA

operating ambient temperature

0

−

70

°C

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA4850

DIP20

plastic dual in-line package; 20 leads (300 mil)

SOT146-1