전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

LM2418 데이터시트(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 LM2418
상세설명  Triple 30 MHz CRT Driver
Download  6 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2418 데이터시트(HTML) 3 Page - National Semiconductor (TI)

  LM2418 Datasheet HTML 1Page - National Semiconductor (TI) LM2418 Datasheet HTML 2Page - National Semiconductor (TI) LM2418 Datasheet HTML 3Page - National Semiconductor (TI) LM2418 Datasheet HTML 4Page - National Semiconductor (TI) LM2418 Datasheet HTML 5Page - National Semiconductor (TI) LM2418 Datasheet HTML 6Page - National Semiconductor (TI)  
Zoom Inzoom in Zoom Outzoom out
 3 / 6 page
background image
LM2418Theory of Operation
The LM2418 is a high voltage triple CRT driver suitable for
VGA display applications The LM2418 features 90V opera-
tion and low power dissipation The part is housed in the
industry standard 11-lead TO-220 molded power package
The heat sink is electrically isolated from the circuitry and
may be grounded for ease of manufacturing and RFI shield-
ing
The circuit diagram of the LM2418 is shown in
Figure 1 Q1
and R2 provide a conversion of input voltage to current
while Q2 acts as a common base or cascode amplifier stage
to drive the load resistor R1 Emitter followers Q3 and Q4
isolate the impedance of R1 from the capacitance of the
CRT cathode and make the circuit relatively insensitive to
load capacitance The gain of this circuit is bR1R2 and is
fixed at b19 The bandwidth of the circuit is set by the
collector time constant formed by the load resistor R1 and
associated capacitance of Q2 Q3 Q4 and stray layout ca-
pacitance Diodes D1 and D2 provide forward bias to the
output stage to reduce crossover distortion at low signal
levels while R3 provides a DC bias offset to match the out-
put level characteristics of the LM1203 RGB Video Amplifier
System Proprietary transistor design allows for high band-
width with low operating power
Figure 2 shows a typical test circuit for evaluation of the
LM2418 This circuit is designed to allow testing of the
LM2418 in a 50X environment such as a pulse generator
and a scope or a network analyzer In this test circuit two
resistors in series totaling 495 kX form a wideband low
capacitance probe to match the output of the LM2418 to a
50X cable and load Typical AC performance of the circuit is
shown in
Figure 3 The input signal is AC coupled to the
base of Q1 while a DC bias of 12V is applied to the base of
Q2 (See
Figure 2 )
Thermal Considerations
The transfer characteristics of the amplifier are shown in
Figures 4 and 5 Power supply current increases as the in-
put signal increases and consequently power dissipation
also increases
The LM2418 cannot be used without heat sinking
Figure 5
shows the power dissipated in each channel over the oper-
ating voltage range of the device Typical ‘‘average’’ power
dissipation with the device output voltage at one half the
supply voltage is 18W per channel for a total dissipation of
54W package dissipation Under white screen conditions
ie 20V output dissipation increases to 30W per channel
or 9W total The LM2418 case temperature must be main-
tained below 100 C If the maximum expected ambient tem-
perature is 60 C then a maximum heat sink thermal resist-
ance can be calculated
Rth e
(100 C b 60 C)
9W
e
44 CW
PRECAUTION
THE
LM2418
IS
NOT
PROTECTED
AGAINST OUTPUT SHORT CIRCUITS The minimum re-
sistance the LM2418 can drive is 800X to ground or Va
TLK11125 – 7
FIGURE 4 LM2418 DC Characteristics
TLK11125 – 9
FIGURE 5 LM2418 Output Swing
and Power Characteristics
3


유사한 부품 번호 - LM2418

제조업체부품명데이터시트상세설명
logo
Seoul Semiconductor
LM241 SEOUL-LM241 Datasheet
376Kb / 14P
   INFRARED LAMP LED
LM241 SEOUL-LM241 Datasheet
360Kb / 13P
   CYAN LAMP LED
LM241 SEOUL-LM241 Datasheet
392Kb / 14P
   RED OVAL LAMP LED
LM241 SEOUL-LM241 Datasheet
392Kb / 14P
   RED OVAL LAMP LED
LM241 SEOUL-LM241 Datasheet
378Kb / 14P
   RED LAMP LED
More results

유사한 설명 - LM2418

제조업체부품명데이터시트상세설명
logo
Texas Instruments
LM2422TE TI1-LM2422TE Datasheet
846Kb / 15P
[Old version datasheet]   Monolithic Triple Channel 30 MHz CRT DTV Driver
logo
National Semiconductor ...
LM2416 NSC-LM2416 Datasheet
214Kb / 4P
   Triple 50 MHz CRT Driver
LM2419 NSC-LM2419 Datasheet
161Kb / 8P
   Triple 65 MHz CRT Driver
LM2427 NSC-LM2427 Datasheet
117Kb / 6P
   Triple 80 MHz CRT Driver
LH2426 NSC-LH2426 Datasheet
100Kb / 4P
   Triple 80 MHz CRT Driver
LM2422 NSC-LM2422 Datasheet
603Kb / 8P
   220V Monolithic Triple Channel 30 MHz CRT DTV Driver
LM2422TE NSC-LM2422TE Datasheet
1Mb / 13P
   220V Monolithic Triple Channel 30 MHz CRT DTV Driver
LM2422_0505 NSC-LM2422_0505 Datasheet
602Kb / 8P
   220V Monolithic Triple Channel 30 MHz CRT DTV Driver
logo
Calogic, LLC
CVA1405T CALOGIC-CVA1405T Datasheet
66Kb / 4P
   Triple CRT Driver
CVA2407T CALOGIC-CVA2407T Datasheet
35Kb / 3P
   Triple CRT Driver
More results


Html Pages

1 2 3 4 5 6


데이터시트 다운로드

Go To PDF Page


링크 URL




개인정보취급방침
ALLDATASHEET.CO.KR
ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크교환   |   제조사별 검색
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com