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PDF LM2445TA Data sheet ( Hoja de datos )
| Número de pieza | LM2445TA | |
| Descripción | Monolithic Triple 7.5 ns CRT Driver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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March 2003
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.
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
peaking networks
n Convenient TO-220 staggered lead package style
n Maintains standard LM243X Family pinout which is
designed for easy PCB layout
Applications
n 1024 x 768 displays up to 85 Hz refresh
n Pixel clock frequencies up to 95 MHz
n Monitors using video blanking
Schematic Diagram
FIGURE 1. Simplified Schematic Diagram
(One Channel)
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© 2003 National Semiconductor Corporation DS200637
www.national.com
1 page  
Typical Performance Characteristics (VCC = +80 VDC, VBB = +12 VDC, CL = 8 pF, VOUT = 40 VPP
(25V−65V), Test Circuit - Figure 2 unless otherwise specified)
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FIGURE 3. VOUT vs VIN
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FIGURE 6. Power Dissipation vs Frequency
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FIGURE 4. Speed vs Temp.
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FIGURE 7. Speed vs Offset
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FIGURE 5. LM2445 Pulse Response
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FIGURE 8. Speed vs Load Capacitance
5 www.national.com
5 Page 
Application Hints (Continued)
FIGURE 13. LM126X/LM246X Demo Board Layout
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11 www.national.com
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LM2445TA.PDF ] | |
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