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PDF LM2451 Data sheet ( Hoja de datos )
| Número de pieza | LM2451 | |
| Descripción | 220V Monolithic Triple Channel 12 MHz DC Coupled CRT DTV Driver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LM2451 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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www.DataSheet4U.com
December 2005
LM2451
220V Monolithic Triple Channel 12 MHz DC Coupled CRT
DTV Driver
General Description
The LM2451 is a triple channel high voltage DC coupled
CRT driver circuit designed for use in DTV applications. The
IC contains three high input impedance, wide band amplifi-
ers which directly drive the RGB cathodes of a CRT. Each
amplifier has a summing input where the DC level of the
output is controlled by a low voltage DC input voltage. Nor-
mally the DC input voltage is from a DAC. Each channel has
its gain internally set to −54 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 a 15-lead TO-247 molded plastic
power package designed specifically to meet high voltage
spacing requirements. See Thermal Considerations section.
Features
n 12 MHz bandwidth at 130VP-P
n 100V black level adjustment range using 0V to 5V input
n Current output for IK feedback systems
n Greater than 130VP-P output swing capability
n 0V to 5V input voltage range
n Stable with 0 pF–20 pF capacitive loads and inductive
peaking networks
n Convenient TO-247 staggered thin lead package style
Applications
n DC coupled DTV applications using the 480p format as
well as standard NTSC and PAL formats.
Connection Diagram
Schematic Diagram
20144401
FIGURE 1. Top View
Order Number LM2451TB
See NS Package Number TB15A
20144402
FIGURE 2. Simplified Schematic Diagram
(One Channel)
© 2005 National Semiconductor Corporation DS201444
www.national.com
1 page  
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Typical Performance Characteristics (VCC = +220VDC, VBB = +12VDC, CL = 10 pF, VOUT = 130VPP
(60V – 190V), TC = 50˚C, Test Circuit — Figure 3 unless otherwise specified)
20144410
FIGURE 10. Power Dissipation vs Frequency
20144411
FIGURE 11. Safe Operating Area
20144412
FIGURE 12. LM2451 Cathode Response
5 www.national.com
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Application Hints (Continued)
20144417
FIGURE 16. Trace Routing and Component Placement for Blue Channel Output
11 www.national.com
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LM2451.PDF ] | |
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