전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

FDS2670 데이터시트(PDF) 2 Page - Fairchild Semiconductor

부품명 FDS2670
상세설명  Power Converter Topology and MOSFET Selection for 48-V Telecom
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  FAIRCHILD [Fairchild Semiconductor]
홈페이지  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FDS2670 데이터시트(HTML) 2 Page - Fairchild Semiconductor

  FDS2670 Datasheet HTML 1Page - Fairchild Semiconductor FDS2670 Datasheet HTML 2Page - Fairchild Semiconductor FDS2670 Datasheet HTML 3Page - Fairchild Semiconductor FDS2670 Datasheet HTML 4Page - Fairchild Semiconductor FDS2670 Datasheet HTML 5Page - Fairchild Semiconductor FDS2670 Datasheet HTML 6Page - Fairchild Semiconductor FDS2670 Datasheet HTML 7Page - Fairchild Semiconductor FDS2670 Datasheet HTML 8Page - Fairchild Semiconductor FDS2670 Datasheet HTML 9Page - Fairchild Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 2 / 12 page
background image
2
Rev. A, June 2001
©2001 Fairchild Semiconductor Corporation
Figure 1. Simplified flyback regulator schematic.
For 36- to 72-V input designs, the FDS3670, 100V MOSFET is the lowest voltage part that
should be used. Even then, the drain voltage will have to be carefully controlled with some
form of primary side clamp circuit. If the input supply can be expected to experience transient
voltages on the order of 100V, the 150V FDS2570 should be considered. It is important to
note, two devices would have to be connected in parallel to maintain the same power level that
can be achieved with a single FDS3670.
The off-state voltage is determined by the input voltage, output voltage, transformer turns ratio,
transformer leakage inductance, and snubber/clamp circuit. Ignoring the effects of leakage
inductance, the off voltage is equal to the input voltage plus the output voltage multiplied by the
transformer turns ratio. As an example, assuming a 1:1 turns ratio and a 5V output, the off-
state drain voltage is equal to Vin plus 5V. The effects of leakage inductance complicate the
matter considerably. The energy stored in the leakage inductance is equal to LI2/2, where L is
the leakage inductance and I is the peak primary current. This energy appears as a voltage
impressed on the various stray capacitances around the circuit. The energy is equal to CV2/2
and, therefore, Vpk=Ipk(L/C)
1/2. The problem is complicated by the fact that most of the stray
capacitances are nonlinear and vary greatly as a function of the instantaneous voltage
applied. As such, an empirical approach to designing the snubbers and clamps is generally
used. Figure 2 shows typical waveforms for the flyback regulator. Generally in a 48V
application, the maximum useful power level for a flyback design will be around 20 to 30 watts.
Above that, consider a single transistor forward converter as shown in Figure 3.
Gate
Q1
RTN
C2
D1
T1
+
C1
+
U1
PWM
GND
VOUT
VIN


유사한 부품 번호 - FDS2670

제조업체부품명데이터시트상세설명
logo
Fairchild Semiconductor
FDS2670 FAIRCHILD-FDS2670 Datasheet
339Kb / 8P
   200V N-Channel PowerTrench MOSFET
FDS2670 FAIRCHILD-FDS2670 Datasheet
107Kb / 6P
   200V N-Channel PowerTrench MOSFET
FDS2670 FAIRCHILD-FDS2670_01 Datasheet
107Kb / 6P
   200V N-Channel PowerTrench MOSFET
More results

유사한 설명 - FDS2670

제조업체부품명데이터시트상세설명
logo
Fairchild Semiconductor
7004 FAIRCHILD-7004 Datasheet
85Kb / 12P
   Power Converter Topology
logo
ON Semiconductor
NCP1561 ONSEMI-NCP1561 Datasheet
250Kb / 22P
   Push-Pull PWM Controller for 48 V Telecom Systems
August, 2004 ??Rev. 3
NCP1031MNTXG ONSEMI-NCP1031MNTXG Datasheet
444Kb / 19P
   Low Power PWM Controller with On--Chip Power Switch and Startup Circuits for 48 V Telecom Systems
December, 2010 -- Rev. 10
NCP1030 ONSEMI-NCP1030 Datasheet
142Kb / 18P
   Low Power PWM Controller with On-Chip Power Switch and Startup Circuits for 48 V Telecom Systems
December, 2010 -- Rev. 10
NCP1030 ONSEMI-NCP1030_06 Datasheet
166Kb / 18P
   Low Power PWM Controller with On?묬hip Power Switch and Startup Circuits for 48V Telecom Systems
January, 2006 ??Rev. 6
NCP1030 ONSEMI-NCP1030 Datasheet
444Kb / 19P
   Low Power PWM Controller with On--Chip Power Switch and Startup Circuits for 48 V Telecom Systems
December, 2010 -- Rev. 10
logo
Vishay Siliconix
SI9117 VISHAY-SI9117 Datasheet
132Kb / 15P
   High-Frequency Converter for Telecom Applications
Rev. E, 19-Apr-04
logo
ALPS ELECTRIC CO.,LTD.
SDDE ALPS-SDDE Datasheet
1,014Kb / 3P
   One switch for main power, mode selection and start
logo
International Rectifier
IRF7823PBF IRF-IRF7823PBF Datasheet
669Kb / 10P
   Power MOSFET Selection for Non-Isolated DC/DC Converters
logo
Vishay Siliconix
SIHW47N65E VISHAY-SIHW47N65E Datasheet
161Kb / 7P
   Server and telecom power supplies
Rev. C, 02-Dec-13
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


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