LM2403

Monolithic Triple 4.5 nS CRT Driver

General Description

The LM2403 is an integrated high voltage CRT driver circuit

designed for use in high resolution color monitor applica-

tions. The IC contains three high input impedance, wide

band amplifiers which directly drive the RGB cathodes of a

CRT. Each channel has its gain internally set to −14 and can

drive CRT capacitive loads as well as resistive loads pre-

sented by other applications, limited only by the package’s

power dissipation.

The IC is packaged in an industry standard 11 lead TO-220

molded plastic power package. See thermal considerations

on page 5.

Features

n Well matched with LM1283 video preamp

n 1V to 5V input range

n Stable with 0 pF–20 pF capacitive loads and inductive

peaking networks

n Convenient TO-220 staggered lead package style

n Standard LM240X Family Pinout which is designed for

easy PCB layout

Applications

n CRT driver for color monitors with display resolutions up

to 1600 x 1200

n Pixel clock frequency up to 160 MHz

Schematic and Connection Diagrams

DS100082-1

DS100082-2

Top View

Order Number LM2403T

FIGURE 1. Simplified Schematic Diagram (One Channel)

August 1999

© 1999 National Semiconductor Corporation

DS100082

www.national.com