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PDF LM2452 Data sheet ( Hoja de datos )
| Número de pieza | LM2452 | |
| Descripción | 220V Monolithic Triple Channel 17 MHz DC Coupled CRT DTV Driver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LM2452 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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October 2005
LM2452
220V Monolithic Triple Channel 17 MHz DC Coupled CRT
DTV Driver
General Description
The LM2452 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 17 MHz bandwidth
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 HDTV applications using the 1080i format
as well as standard NTSC and PAL formats.
Connection Diagram
Schematic Diagram
20144501
FIGURE 1. Top View
Order Number LM2452TB
See NS Package Number TB15A
20144502
FIGURE 2. Simplified Schematic Diagram
(One Channel)
© 2005 National Semiconductor Corporation DS201445
www.national.com
1 page  
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Typical Performance Characteristics VOUT = 110VPP (VCC = +220VDC, VBB = +12VDC, CL
= 10 pF, VOUT = 110VPP (60V – 190V), TC = 50˚C, Test Circuit — Figure 3 unless otherwise specified)
20144510
FIGURE 10. Power Dissipation vs Frequency
20144511
FIGURE 11. Safe Operating Area
20144512
FIGURE 12. LM2452 Cathode Response
5 www.national.com
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Application Hints (Continued)
20144517
FIGURE 16. Trace Routing and Component Placement for Blue Channel Output
11 www.national.com
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LM2452.PDF ] | |
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