TDA4851 查看數據表（PDF） - Philips Electronics

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TDA4851

Horizontal and vertical deflection controller for VGA/XGA and autosync monitors

Philips Electronics 

Philips Semiconductors

Horizontal and vertical deflection controller for

VGA/XGA and autosync monitors

Preliminary specification

TDA4851

FEATURES

• VGA operation fully implemented including

alignment-free vertical and E/W amplitude presettings

• 4th VGA mode easy applicable (XGA, Super VGA)

• Autosync operation externally selectable

• Low jitter

• 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 autosync

operation

• DC-coupling to vertical power amplifier

• Internal supply voltage stabilization with excellent ripple

rejection to ensure stable geometrical adjustments

GENERAL DESCRIPTION

The TDA4851 is a monolithic integrated circuit for

economical solutions in VGA/XGA and autosync 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 TDA4860/61/65,

or TDA8351 (vertical output circuits) the ICs offer an

extremely advanced system solution.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

VP

IP

Vi sync

positive supply voltage (pin 1)

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 (peak-to-peak value,

pin 9)

slicing level

DC-coupled TTL-compatible vertical sync signal (peak-to-peak value,

pin 10)

slicing level

Io V

Io H

Tamb

vertical differential output current (peak-to-peak value, pins 5 and 6)

horizontal sink output current on pin 3

operating ambient temperature range

MIN. TYP. MAX. UNIT

9.2 12 16

V

− 40 −

mA

−1−

V

− 120 −

mV

1.7 − −

V

1.2 1.4 1.6 V

1.7 − −

V

1.2 1.4 1.6 V

−1−

mA

− − 60

mA

0 − +70 °C

ORDERING INFORMATION

EXTENDED TYPE

NUMBER

PINS

TDA4851

20

Note

1. SOT146-1; 1996 November 26.

PIN POSITION

DIL

PACKAGE

MATERIAL

plastic

CODE

SOT146(1)

November 1992

2

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