công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

MC34262 bảng dữ liệu(PDF) 6 Page - ON Semiconductor

tên linh kiện MC34262
Giải thích chi tiết về linh kiện  POWER FACTOR CONTROLLERS
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  ONSEMI [ON Semiconductor]
Trang chủ  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC34262 bảng dữ liệu(HTML) 6 Page - ON Semiconductor

Back Button MC34262 Datasheet HTML 2Page - ON Semiconductor MC34262 Datasheet HTML 3Page - ON Semiconductor MC34262 Datasheet HTML 4Page - ON Semiconductor MC34262 Datasheet HTML 5Page - ON Semiconductor MC34262 Datasheet HTML 6Page - ON Semiconductor MC34262 Datasheet HTML 7Page - ON Semiconductor MC34262 Datasheet HTML 8Page - ON Semiconductor MC34262 Datasheet HTML 9Page - ON Semiconductor MC34262 Datasheet HTML 10Page - ON Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 6 / 16 page
background image
MC34262 MC33262
6
MOTOROLA ANALOG IC DEVICE DATA
FUNCTIONAL DESCRIPTION
Introduction
With the goal of exceeding the requirements of legislation
on line–current harmonic content, there is an ever increasing
demand for an economical method of obtaining a unity power
factor. This data sheet describes a monolithic control IC that
was specifically designed for power factor control with
minimal external components. It offers the designer a simple,
cost–effective solution to obtain the benefits of active power
factor correction.
Most electronic ballasts and switching power supplies use
a bridge rectifier and a bulk storage capacitor to derive raw dc
voltage from the utility ac line, Figure 15.
Figure 15. Uncorrected Power Factor Circuit
AC
Line
Rectifiers
Converter
Bulk
Storage
Capacitor
+
Load
This simple rectifying circuit draws power from the line
when the instantaneous ac voltage exceeds the capacitor
voltage. This occurs near the line voltage peak and results in
a high charge current spike, Figure 16. Since power is only
taken near the line voltage peaks, the resulting spikes of
current are extremely nonsinusoidal with a high content of
harmonics. This results in a poor power factor condition
where the apparent input power is much higher than the real
power. Power factor ratios of 0.5 to 0.7 are common.
Power factor correction can be achieved with the use of
either a passive or an active input circuit. Passive circuits
usually contain a combination of large capacitors, inductors,
and rectifiers that operate at the ac line frequency. Active
circuits incorporate some form of a high frequency switching
converter for the power processing, with the boost converter
being the most popular topology, Figure 17. Since active
input circuits operate at a frequency much higher than that of
the ac line, they are smaller, lighter in weight, and more
efficient than a passive circuit that yields similar results. With
proper control of the preconverter, almost any complex load
can be made to appear resistive to the ac line, thus
significantly reducing the harmonic current content.
Figure 16. Uncorrected Power Factor
Input Waveforms
Vpk
Rectified
0
AC Line
Voltage
0
AC Line
Current
Line Sag
DC
The MC34262, MC33262 are high performance, critical
conduction, current–mode power factor controllers
specifically designed for use in off–line active preconverters.
These devices provide the necessary features required to
significantly enhance poor power factor loads by keeping the
ac line current sinusoidal and in phase with the line voltage.
Operating Description
The MC34262, MC33262 contain many of the building
blocks and protection features that are employed in modern
high performance current mode power supply controllers.
There are, however, two areas where there is a major
difference when compared to popular devices such as the
UC3842 series. Referring to the block diagram in Figure 19,
note that a multiplier has been added to the current sense
loop and that this device does not contain an oscillator. The
reasons for these differences will become apparent in the
following discussion. A description of each of the functional
blocks is given below.
Figure 17. Active Power Factor Correction Preconverter
Rectifiers
PFC Preconverter
High
Frequency
Bypass
Capacitor
+
Converter
Bulk
Storage
Capacitor
+
Load
MC34362
AC
Line


Số phần tương tự - MC34262

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
ON Semiconductor
MC34262 ONSEMI-MC34262 Datasheet
394Kb / 19P
   Power Factor Controllers
November, 2005 ??Rev. 9
MC34262 ONSEMI-MC34262 Datasheet
3Mb / 4P
   AC-DC Offline Switching Controllers/Regulators
Rev.0, Jun-2005
logo
International Rectifier
MC34262 IRF-MC34262 Datasheet
355Kb / 16P
   High Power Factor/Low THD
logo
Unisonic Technologies
MC34262 UTC-MC34262 Datasheet
206Kb / 6P
   POWER FACTOR CONTROLLERS
logo
Guangdong Kexin Industr...
MC34262 KEXIN-MC34262 Datasheet
676Kb / 8P
   Power Factor Controllers
More results

Mô tả tương tự - MC34262

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
ON Semiconductor
MC34261 ONSEMI-MC34261 Datasheet
500Kb / 13P
   Power Factor Controllers
July, 2006 ??Rev. 3
MC34262 ONSEMI-MC34262_05 Datasheet
394Kb / 19P
   Power Factor Controllers
November, 2005 ??Rev. 9
logo
IK Semicon Co., Ltd
IL34262 IKSEMICON-IL34262_11 Datasheet
549Kb / 9P
   Power Factor Controllers
logo
ON Semiconductor
MC34262 ONSEMI-MC34262_13 Datasheet
399Kb / 19P
   Power Factor Controllers
August, 2013 ??Rev. 14
logo
IK Semicon Co., Ltd
IL34262 IKSEMICON-IL34262 Datasheet
696Kb / 9P
   Power Factor Controllers
logo
List of Unclassifed Man...
IL34262 ETC-IL34262 Datasheet
316Kb / 12P
   Power Factor Controllers
logo
Guangdong Kexin Industr...
MC34262 KEXIN-MC34262 Datasheet
676Kb / 8P
   Power Factor Controllers
logo
Unisonic Technologies
MC34262 UTC-MC34262 Datasheet
206Kb / 6P
   POWER FACTOR CONTROLLERS
logo
ON Semiconductor
MC34262 ONSEMI-MC34262_11 Datasheet
401Kb / 19P
   Power Factor Controllers
September, 2011 ??Rev. 13
logo
Motorola, Inc
MC34261 MOTOROLA-MC34261 Datasheet
309Kb / 12P
   POWER FACTOR CONTROLLERS
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


bảng dữ liệu tải về

Go To PDF Page


Link URL




Chính sách bảo mật
ALLDATASHEET.VN
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
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