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PDF LM2470 Data sheet ( Hoja de datos )
| Número de pieza | LM2470 | |
| Descripción | Monolithic Triple 7.0 ns CRT Driver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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April 2004
LM2470
Monolithic Triple 7.0 ns CRT Driver
General Description
The LM2470 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 9-lead TO-220
molded plastic power package. See the Thermal Consider-
ations section for more information.
Features
n Well matched to the LM1236/46 CMOS preamplifiers
n Swing up to 60PP (15V - 75V)
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 LM246X 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)
20087101
© 2004 National Semiconductor Corporation DS200871
www.national.com
1 page  
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Typical Performance Characteristics (VCC = +85 VDC, VBB = +8 VDC, CL = 8 pF, VOUT = 40 VPP
(35V−75V), Test Circuit - Figure 2 unless otherwise specified)
FIGURE 3. VOUT vs VIN
20087104
20087107
FIGURE 6. Power Dissipation vs Frequency
20087105
FIGURE 4. Speed vs Temp.
20087108
FIGURE 7. Speed vs Offset
20087106
FIGURE 5. LM2470 Pulse Response
20087109
FIGURE 8. Speed vs Load Capacitance
5 www.national.com
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Application Hints (Continued)
FIGURE 13. LM123X/LM124X - LM246X Demo Board Layout
20087119
11 www.national.com
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LM2470.PDF ] | |
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