LM2445 National Semiconductor, LM2445 Datasheet
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LM2445
Manufacturer Part Number
LM2445
Description
Monolithic Triple 7.5 ns CRT Driver
Manufacturer
National Semiconductor
Datasheet
1.LM2445.pdf
(14 pages)
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© 2003 National Semiconductor Corporation
LM2445
Monolithic Triple 7.5 ns CRT Driver
General Description
The LM2445 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 −20 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 9-lead TO-220
molded plastic power package. See the Thermal Consider-
ations section for more information.
Schematic Diagram
FIGURE 1. Simplified Schematic Diagram
DS200637
(One Channel)
Features
n Higher gain to match LM126X CMOS preamplifiers
n 0V to 3.75V input range
n Stable with 0–20 pF capacitive loads and inductive
n Convenient TO-220 staggered lead package style
n Maintains standard LM243X Family pinout which is
Applications
n 1024 x 768 displays up to 85 Hz refresh
n Pixel clock frequencies up to 95 MHz
n Monitors using video blanking
peaking networks
designed for easy PCB layout
20063701
www.national.com
March 2003