LM2471

Monolithic Triple 4 ns High Swing CRT Driver

General Description

The LM2471 is an integrated high voltage CRT driver circuit

designed for use in color monitor applications. The IC con-

tains three high input impedance, wide band amplifiers

which directly drive the RGB cathodes of a CRT. Each

channel has its gain internally set to −27 and can drive CRT

capacitive loads as well as resistive loads present in 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

section for more information.

Features

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Well-matched to the LM126X preamplifiers

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Higher gain for high brightness applications

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0V to 3.4V input range

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Stable with 0–20 pF capacitive loads and inductive

peaking networks

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Convenient TO-220 staggered lead package style

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Maintains standard LM24XX Family pinout which is

designed for easy PCB layout

Applications

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1600 x 1200 displays up to 70 Hz refresh

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Pixel clock frequencies up to 180 MHz

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Monitors using video blanking

Schematic and Connection Diagrams

20103702

Note: Tab is at GND

Top View

Order Number LM2471TA

20103701

FIGURE 1. Simplified Schematic Diagram

(One Channel)

July 2004

© 2004 National Semiconductor Corporation

DS201037

www.national.com