전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

1N4004 데이터시트(PDF) 3 Page - STMicroelectronics

부품명 1N4004
상세설명  APPLICATION NOTE
Download  42 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

1N4004 데이터시트(HTML) 3 Page - STMicroelectronics

  1N4004 Datasheet HTML 1Page - STMicroelectronics 1N4004 Datasheet HTML 2Page - STMicroelectronics 1N4004 Datasheet HTML 3Page - STMicroelectronics 1N4004 Datasheet HTML 4Page - STMicroelectronics 1N4004 Datasheet HTML 5Page - STMicroelectronics 1N4004 Datasheet HTML 6Page - STMicroelectronics 1N4004 Datasheet HTML 7Page - STMicroelectronics 1N4004 Datasheet HTML 8Page - STMicroelectronics 1N4004 Datasheet HTML 9Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 3 / 42 page
background image
3/42
AN1262 APPLICATION NOTE
2
CONVERTER ELECTRICAL SPECIFICATION
The starting point of the design procedure is the properties of the converter as a black-box, that is the set of data
listed in the electrical specification table (table 1). Additional requirements, such as efficiency at zero load or
line/load regulation or maximum junction temperature, etc., can be added to that list and their impact will be con-
sidered where appropriate.
s
Mains Voltage: Range and Frequency. There are basically the three possible options listed in table 2,
where a variation of ± 20% is assumed, according to common practice. There are exceptions like some
distribution lines rated at 277 VAC, where a ± 10% spread can be considered, or other special cases for
specific applications. Table 2 shows also the line frequency to be considered in the standard cases at
the minimum specified mains voltages. An additional specification may require the converter to be shut
down if the mains voltage falls below a "brownout level". This additional specification will be used for
setting up the brownout protection on the types where it is available.
Table 2. Mains voltage specifications
s
Number of holdup cycles. The holdup requirement is the ability of the converter to keep the output volt-
age in regulation even in case of mains interruption (missing cycles). This is usually specified in terms
of number of mains cycles NH. This feature is not always demanded (in which case, NH = 0), otherwise
the typical requirement is 1 mains cycle, that is NH = 1. It impacts on the input bulk capacitor selection.
s
Output voltage tolerance. It can be expressed either in absolute value or as a percentage of the nominal
voltage. This requirement, as well as the ones on line and load regulation, if specified, will affect the
choice of the feedback technique (primary or secondary).
s
Output voltage ripple. The ripple superimposed on top of the DC output voltage is specified as the peak-
to-peak amplitude and includes both low frequency (at 2·fL) and high frequency (fsw) component.
Switching noise due to parasitics of the printed circuit board and random noise are beyond the scope
of this procedure. This requirement, if tight, may require the use of an additional filtering cell at the out-
put.
s
Converter Efficiency. The efficiency is, by definition, the ratio of the output power to the input power.
This figure is strongly dependent on the output voltage, because of the losses on the secondary diode.
It should be set based on experience, using numbers of similar converters as a reference. As a rule of
thumb, 75% (
η = 0.75) can be used for a low voltage output (3.3 V or 5 V) and 80% (η = 0.8) for higher
output voltages (12 V and above).
3
PRE-DESIGN CHOICES
Before starting the design calculations of the various parts of the converter, some parameters not defined at the
"black-box level" need to be fixed. There is some degree of freedom in the selection of these parameters, pro-
vided some constraints are taken into account.
s
Reflected Voltage. In principle, the reflected voltage should be as high as possible. In fact this leads to
a greater duty cycle, which minimizes the RMS current through the IC's MOSFET for a given power
throughput. There are two possible limitations to the maximum reflected voltage. One is the maximum
duty cycle Dmax allowed by the devices (67% min.); some margin should be considered for load tran-
sients, thus the reflected voltage should be such that the maximum duty cycle (at minimum input voltage
Input (VAC)VACmin (VAC)VACmax (VAC)fL (Hz)
110
88
132
60
220
176
264
50
WRM (Wide Range Mains)
88
264
60


유사한 부품 번호 - 1N4004

제조업체부품명데이터시트상세설명
logo
Pan Jit International I...
1N4004 PANJIT-1N4004 Datasheet
96Kb / 2P
   PLASTIC SILICON RECTIFIERS
logo
Central Semiconductor C...
1N4004 CENTRAL-1N4004 Datasheet
72Kb / 2P
   AMP SILICON RECTIFIER
logo
Pan Jit International I...
1N4004 PANJIT-1N4004 Datasheet
53Kb / 2P
   PLASTIC SILICON RECTIFIER(VOLTAGE - 50 to 1000 Volts CURRENT - 1.0 Ampere)
logo
EIC discrete Semiconduc...
1N4004 EIC-1N4004 Datasheet
54Kb / 2P
   SILICON RECTIFIER DIODES
logo
Guangdong Juxing Electr...
1N4004 JUXING-1N4004 Datasheet
1Mb / 2P
   SILICON RECTIFIER
More results

유사한 설명 - 1N4004

제조업체부품명데이터시트상세설명
logo
Analog Devices
AN-236 AD-AN-236 Datasheet
164Kb / 3P
   APPLICATION NOTE
AN-686 AD-AN-686 Datasheet
55Kb / 2P
   APPLICATION NOTE
REV. 0
logo
Vectron International, ...
TFS211C VECTRON-TFS211C_03 Datasheet
40Kb / 2P
   Application Note
TFS199D VECTRON-TFS199D_08 Datasheet
25Kb / 1P
   Application Note
TFS380K VECTRON-TFS380K Datasheet
28Kb / 1P
   Application Note
TFS433K VECTRON-TFS433K_01 Datasheet
25Kb / 1P
   Application Note
logo
International Rectifier
AN-1070 IRF-AN-1070 Datasheet
241Kb / 14P
   Application Note
AN-1086 IRF-AN-1086 Datasheet
181Kb / 9P
   Application Note
logo
Vectron International, ...
TFS248E_0208 VECTRON-TFS248E_0208 Datasheet
13Kb / 1P
   Application Note
TFS321_0106 VECTRON-TFS321_0106 Datasheet
43Kb / 3P
   Application Note
logo
International Rectifier
AN-1204 IRF-AN-1204 Datasheet
916Kb / 11P
   Application Note
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42


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