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參數(shù)資料
| 型號(hào)： | LM2429 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Monolithic Triple Channel 15 MHz DTV Driver |
| 中文描述： | 單片三頻道15兆赫數(shù)字電視驅(qū)動(dòng) |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 723K |
| 代理商： | LM2429 |
Typical Performance Characteristics
(V
CC
= +180V
DC
, V
BB
= +8V
DC
, C
L
= 8pF, V
OUT
= 130V
PP
(35V 165V), Test Circuit -
Figure 3
unless otherwise specified) (Continued)
TABLE 1. Power Dissipation for Various Video Patterns
Power Dissipation (W)
Pattern
Format
480i
1.8
4.0
3.1
3.2
2.7
3.0
2.7
3.6
2.3
3.8
5.2
6.1
3.4
3.7
5.0
4.6
5.0
5.6
7.2
11.5
480p
1.8
4.0
3.1
3.3
2.8
3.0
2.7
3.9
2.6
4.1
7.3
8.9
4.3
4.4
6.2
6.3
7.1
8.7
11.4
15.4
Raster
Full White Field
White Box, 75% Screen Size
Gray Bars
Color Bars 75% Amplitude
Color Bars 100% Amplitude
SMPTE Color Bars
SMPTE 133
Cross Hatch 16x12
Resolution Chart
Multiburst
White Text on Black Background
Windows Pattern
Windows Pattern
Windows Pattern
Vertical Lines 5 On 5 Off
Vertical Lines 4 On 4 Off
Vertical Lines 3 On 3 Off
Vertical Lines 2 On 2 Off
Vertical Lines 1 On 1 Off
Note:
Input from signal generator: t
r
, t
f
<
2 ns.
Theory of Operation
The LM2429 is a high voltage monolithic three channel CRT
driver suitable for HDTV applications. The LM2429 operates
with 180V and 8V power supplies. The part is housed in the
industry standard 11-lead TO-220 molded plastic power
package with thin leads for improved metal-to-metal spacing.
The circuit diagram of the LM2429 is shown in
Figure 2
. The
PNP emitter follower, Q5, provides input buffering. Q1 and
Q2 form a fixed gain cascode amplifier with resistors R1 and
R2 setting the gain at 51. Emitter followers Q3 and Q4
isolate the high output impedance of the cascode stage from
the capacitance of the CRT cathode which decreases the
sensitivity of the device to load capacitance. Q6 provides
biasing to the output emitter follower stage to reduce cross-
over distortion at low signal levels.
Figure 3
shows a typical test circuit for evaluation of the
LM2429. This circuit is designed to allow testing of the
LM2429 in a 50
environment without the use of an expen-
sive FET probe. In this test circuit, the two 4.99k
resistors
form a 400:1 wideband, low capacitance probe when con-
nected to a 50
coaxial cable and a 50
load (such as a
50
oscilloscope input). The input signal from the generator
is ac coupled to the base of Q5.
Application Hints
INTRODUCTION
National Semiconductor (NSC) is committed to provide ap-
plication information that assists our customers in obtaining
the best performance possible from our products. The fol-
lowing information is provided in order to support this com-
mitment. The reader should be aware that the optimization of
performance was done using a specific printed circuit board
designed at NSC. Variations in performance can be realized
due to physical changes in the printed circuit board and the
application. Therefore, the designer should know that com-
ponent value changes may be required in order to optimize
performance in a given application. The values shown in this
document can be used as a starting point for evaluation
purposes. When working with high bandwidth circuits, good
layout practices are also critical to achieving maximum per-
formance.
IMPORTANT INFORMATION
The LM2429 performance is targeted for the HDTV market.
The application circuits shown in this document to optimize
performance and to protect against damage from CRT ar-
cover are designed specifically for the LM2429. If another
member of the LM242X family is used, please refer to its
datasheet.
L
www.national.com
6
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM2432 | 220V Monolithic Single Channel 37 MHz HDTV CRT Driver |
| LM2432TE | 220V Monolithic Single Channel 37 MHz HDTV CRT Driver |
| LM2436 | Monolithic Triple 7.5 ns CRT Driver |
| LM2436TA | Monolithic Triple 7.5 ns CRT Driver |
| LM2445 | Monolithic Triple 7.5 ns CRT Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2429TE/NOPB | 制造商:Texas Instruments 功能描述:CRT DRVR 180V 11-Pin(11+Tab) TO-220 |
| LM243-155.52M | 制造商:CONNOR-WINFIELD 制造商全稱:Connor-Winfield Corporation 功能描述:5.0x7.0mm Surface Mount LVDS Clock Oscillator Series |
| LM2432 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:220V Monolithic Single Channel 37 MHz HDTV CRT Driver |
| LM2432TE | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:220V Monolithic Single Channel 37 MHz HDTV CRT Driver |
| LM2433 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:220V Monolithic Single Channel 16 MHz EDTV CRT Driver |
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