- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄30745 > LM2426TA (NATIONAL SEMICONDUCTOR CORP) 3 CHANNEL, VIDEO AMPLIFIER, PZFM11 PDF資料下載
參數(shù)資料
| 型號： | LM2426TA |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3 CHANNEL, VIDEO AMPLIFIER, PZFM11 |
| 封裝： | PLASTIC, TO-220, 11 PIN |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 804K |
| 代理商： | LM2426TA |
Typical Performance
Characteristics (V
CC = +180VDC,VBB = +8VDC,
CL = 8pF, VOUT = 110VPP(55V 165V), Test Circuit -
Figure 3 unless otherwise specified) (Continued)
Theory of Operation
The LM2426 is a high voltage monolithic three channel CRT
driver suitable for HDTV applications. The LM2426 operates
with 180V and 8V power supplies. The part is housed in the
industry standard 11-lead TO-220 molded plastic power
package.
The circuit diagram of the LM2426 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 53. 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
LM2426. This circuit is designed to allow testing of the
LM2426 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 LM2426 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 LM2426. If another
member of the LM242X family is used, please refer to its
datasheet.
POWER SUPPLY BYPASS
Since the LM2426 is a wide bandwidth amplifier, proper
power supply bypassing is critical for optimum performance.
Improper power supply bypassing can result in large over-
shoot, ringing or oscillation. 0.1F capacitors should be con-
nected from the supply pins, V
CC and VBB, to ground, as
close to the LM2426 as is practical. Additionally, a 22F or
larger electrolytic capacitor should be connected from both
supply pins to ground reasonably close to the LM2426.
ARC PROTECTION
During normal CRT operation, internal arcing may occasion-
ally occur. Spark gaps, in the range of 300V, connected from
the CRT cathodes to CRT ground will limit the maximum
20049007
FIGURE 10. Power Dissipation vs Frequency
20049016
FIGURE 11. Power Derating Curve
20049019
FIGURE 12. Cathode Pulse Response
LM2426
www.national.com
5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM2433TE | 1 CHANNEL, VIDEO AMPLIFIER, PSFM7 |
| LM2436TA/NOPB | 3 CHANNEL, VIDEO AMPLIFIER, PZFM9 |
| LM2457TA | 3 CHANNEL, VIDEO AMPLIFIER, PZFM15 |
| LM2471TA/NOPB | 1 CHANNEL, VIDEO AMPLIFIER, PZFM11 |
| LM2476TB | 1 CHANNEL, VIDEO AMPLIFIER, PZFM19 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2426TE | 制造商:Rochester Electronics LLC 功能描述:DTV TRIPLE DRIVER, 30 MHZ, 180 - Bulk |
| LM2426TE/NOPB | 功能描述:IC DRIVER DTV 3CH 30MHZ 11-TO220 RoHS:是 類別:集成電路 (IC) >> PMIC - 顯示器驅(qū)動器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 顯示器類型:真空熒光 (VF) 配置:5 x 7（矩陣） 接口:串行 數(shù)字或字符:- 電流 - 電源:3.5mA 電源電壓:2.7 V ~ 3.6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-QSOP 包裝:帶卷 (TR) |
| LM2427 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Triple 80 MHz CRT Driver |
| LM2427T | 制造商:Panasonic Industrial Company 功能描述:IC |
| LM2429 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Monolithic Triple Channel 15 MHz DTV Driver |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。