switching power supply design examples

... Losses CHAPTER 190 193 12 Switching Power Supply Design Examples 12.1 A Low-Cost, Low -Power Flyback Converter 199 12.2 A 100-kHz, 50-W, Off-Line, Half-Bridge Switching Power Supply 209 Parallel Resonant, ... to build the switching supply becomes less than the linear supply at the higher power levels 1 Why Use Switching Power Supplies? All of these advantages make the switching power supply a much ... Configuration CHAPTER Semiconductors Used in a Switching Power Supply 43 5.1 Bipolar Power Transistors 43 5.2 PowerMOSFETs 50 5.3 Rectifiers 56 5.4 Switching Power Supply Control Integrated Circuits 5.4...

Ngày tải lên: 18/04/2014, 12:25

... computer logic circuit design using transistors and switching power supply design, respectively Mr Pressman was the author of the first two editions of Switching Power Supply Design Keith Billings ... the following switching regulator examples In such regulators the on period of the power device (Ton ) is adjusted to maintain 11 12 Switching Power Supply Design FIGURE 1.4 Buck switching regulator ... 257 258 259 xv xvi Switching Power Supply Design 6.6 Low Output Power “Housekeeping” or “Auxiliary” Topologies—Introduction 6.6.1 Housekeeping Power Supply on Output...

Ngày tải lên: 08/08/2014, 06:20

... loop So, in general, the current feedback path of this design is very similar to the current feedback path of a discrete switching power supply design However, there are a few notable differences: ... PIC16HV785 with an on-chip 5V shunt regulator for powering the microcontroller and associated circuitry So, the power conversion section of the power supply design is comprised of the two feedback loops, ... MPLAB Certified logo, MPLIB, MPLINK, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total...

Ngày tải lên: 11/01/2016, 16:38

... boost converter The design of the switching power supply requires many features such as: Lower input current harmonics to meets the IEC 1000-3 harmonic limits High input power factor to minimize ... II Analog and Digital Control Traditionally, the implementation of switching power supply has been accomplished by using analog power factor correction (PFC) as shown in Fig [3] Analog PFC IC's ... controller can guarantee higher bandwidth and higher switching frequency for ac/dc power supply References [1] Jigna Patel, "The Hottest Markets for External Power Supplies Now ans a Look at Potential...

Ngày tải lên: 27/10/2013, 16:15

Ngày tải lên: 10/04/2014, 19:55

... trực tuyến để tìm số cần thiết ví dụ như: - http://www.jscustompcs.com /power_ supply/ - http://www.mymp3car.com/MP3Car/PSUpower.asp Trong thực thế, Khi đem hệ thống thuộc dạng mạnh đưa thử nghiệm ... thiết bị với tổng công suất khoảng 430w vào nguồn có số Continuous Power 400w, chúng hoạt động khoảng thời gian ngắn mức Peak Power nguồn đạt 430w sau khoảng thời gian định, linh kiện nguồn bị ... ±10% -10.8V -13.2V +3.3VDC ±5% +3.14V +3.47V +5V SB ±5% +4.75V +5.25V 12 Chế độ Soft Power tín hiệu chờ 5v: Soft Power cách thức mà nguồn máy tính bật lên tắt Thay sử dụng công tắc cứng chuẩn AT...

Ngày tải lên: 01/11/2012, 16:38

... máy tính Bước Một lý cho việc PSU không hoạt động bạn chưa cắm đầu power switch Đầu power switch, thường đóng dấu PW PW_ON hay POWER SW, từ phía trước thùng máy đến mainboard Tuy nhiên, trường ... thử tắt máy khởi động lại Nếu máy khởi động lần thử thứ hai thứ ba tín hiệu Power_ OK (hoặc Power_ Good) Khi có tín hiệu Power_ OK, mainboard hiểu PSU ổn định, không mainboard không khởi động để tự ... cắm dễ bị bung ra) Vị trí cắm power switch in mainboard, bạn tham khảo tài liệu kèm với mainboard không tìm thấy chân cắm Bước Bạn khởi động cách chập hai chân nút power switch mainboard tua-vít,...

Ngày tải lên: 27/04/2013, 11:36

... reduced TABLE I TURN-ON AND TURN-OFF SWITCHING LOSSES III HIGH REPETITION PULSED POWER SUPPLY A Pulsed Current in High Repetition This switch can be applied to a power supply which supplies high-speed ... semiconductor devices, and the switching loss is generated However, this magnetic energy recovery switch achieves zero voltage switching and zero current switching so that the switching loss is reduced ... In order to confirm this, switching loss of a magnetic recovery switch and hard switching was compared Fig shows turn-off waveforms of one MOSFET element in this switch Switching frequency is kHz...

Ngày tải lên: 15/10/2013, 16:11

... ) f osc ΔVrms (Vi + Vo ) f osc H Chan; Mohawk College 48 Basic Push-Pull Power Converter Push- Operates as a class D power amplifier Output rectifier converts the square-wave to dc Each transistor ... Half-Bridge Power Converter Half- Each transistor “sees” approx Vin Full flux reversal in the transformer and capacitors across DS prevent voltage spikes H Chan; Mohawk College 50 Basic Full-Bridge Power ... protection short-circuit VBE R6 = VB − Vo = (Vo + I L R4 ) − Vo R5 + R6 H Chan; Mohawk College 19 Design Equations for Fold-back Current Limiting FoldMaximum load current without fold-back limiting:...

Ngày tải lên: 13/12/2013, 23:15

... the local power requirements when selecting the voltage for the power supply Step Power supplies are rated by wattage, which is usually between 250 and 300 watts What is the power supply rating ... mini DIN _ USB (Make sure it matches the connector on the Motherboard) Power Supply AT ATX _ Other _ Power Supply Wattage _ Step Examine the screws that will be used for the case ... Lab 3.3.4 Copyright  2002, Cisco Systems, Inc Step Most computer cases come complete with a power supply However, not all cases are built for the United States market and therefore may not be...

Ngày tải lên: 21/12/2013, 19:15

... of inductor L1 (or L2 ) over one switching period in steady-state operation is zero (uB − uC )T1 + uC T0 = (6) ZHOU et al.: SINGLE-PHASE UNINTERRUPTIBLE POWER SUPPLY BASED ON Z-SOURCE INVERTER ... UNINTERRUPTIBLE POWER SUPPLY BASED ON Z-SOURCE INVERTER 3001 TABLE IV STEP RESPONSE OF THE OUTER LOOP TABLE V SPECIFICATIONS OF A 3-KW UPS WITH THE Z-SOURCE INVERTER than the system switching frequency, ... include renewable energy applications, power electronics, and automation systems Po Xu received the B.Eng degree in power systems and the Ph.D degree in power electronics from Hefei University...

Ngày tải lên: 03/01/2014, 19:12

... distribution system Electrical power supply 2.4 2.5 Power supply functions Power supply to the control circuit b Power unit supply The table (C Fig 5) summarises the power units and functions covering ... zones of influence 2 Electrical power supply 2.4 2.4 Power supply functions Power supply functions There are three separate functions: b Supply and cut off the machine power and control units with ... 2 Electrical power supply Summary 2.1 Introduction Page 2.2 Power supply to machinery Page 2.3 Standards and conventions Page 2.4 Power supply functions Page 2.5 Power supply to the control...

Ngày tải lên: 15/02/2014, 08:33

... Asus • Cooler Master • Corsair • Fractal Design • Lian-Li • NZXT • Silverstone • Zalman Power Supply (PSU) An introduction to Power Supplies The power supply is probably best described as being ... Power Rating The power rating of a power supply is most often referred to as its wattage You can usually tell the power rating of a PSU just by looking at its model number; for example, the power ... the more efficient the power supply is the less AC power it requires to provide sufficient DC power, meaning lower overall power consumption from the mains and a smaller power bill The earth will...

Ngày tải lên: 19/03/2014, 20:35

... Power electronics design : a practitioner's guide / by Keith H Sueker.—1st ed p cm Includes bibliographical references and index ISBN 0-7506-7927-1 (hardcover : alk paper) Power electronics Design ... The attendees were design engineers, sales engineers, technicians, and drafters The tutorials were designed to present an overview of the power electronics field as well as design information ... this material In this book, I have defined power electronics as the application of high -power semiconductor technology to large motor drives, power supplies, power conversion equipment, electric utility...

Ngày tải lên: 21/03/2014, 12:10

... Advanced techniques in RF power amplifier design — (Artech House microwave library) Power amplifiers Design Amplifiers, Radio frequency I Title 621.3’8412 ISBN 1-58053-282-9 Cover design by Gary Ragaglia ... Techniques in RF Power Amplifier Design designing them It is not a step-by-step guide on how to build RF power amplifiers, advanced or otherwise I believe that I am addressing topics which RF designers, ... Techniques in RF Power Amplifier Design For a listing of recent titles in the Artech House Microwave Library, turn to the back of this book Advanced Techniques in RF Power Amplifier Design Steve...

Ngày tải lên: 18/04/2014, 11:11

... from bridge rectifiers Power supply- rail rejection A design philosophy for rail rejection Positive supply- rail rejection Negative supply- rail rejection Chapter Class-A power amplifiers An introduction ... and other configurations Chapter Power supplies and PSRR Power supply technologies Simple unregulated supplies Linear regulated supplies Switch-made power supplies Design considerations for unregulated ... solid-state power amplifier design The first aim of this text is to fill that need, by providing a detailed guide to the many design decisions that must be taken when a power amplifier is designed...

Ngày tải lên: 18/04/2014, 12:28

... guest 1.6 A Comment about Power Supply Design Software There is an abundance of software-based power supply design tools, particularly for PWM switching power supply designs Many of these software ... the design specification, the block can be designed within a matter of minutes 3.2 Building-block Approach to Switching Power Supply Design Figure 3–6 Design flow for a PWM switching power supply ... help to guide the designer during the design process 1.5 A Generalized Design Approach to Power Supplies: Introducing the Building-block Approach to Power Supply Design All power supply engineers...

Ngày tải lên: 18/04/2014, 12:28

... DIGITALLY CONTROLLED SWITCH MODE POWER SUPPLY Fig Conventional telecommunication switch mode power supply [1] Fig 125 Proposed digitally controlled switch mode power supply based on matrix converter ... in telecommunication power supplies REFERENCES [1] Tyco Electronics, “Galaxy Switchingmode Rectifier 595 Series,” Tech Rep., Feb 2003 [2] A I Pressman, Switching Power Supply Design New York: McGrawHill, ... Lecturer at Mahidol University Her research interests include ac/ac power converter, switch mode power supply, power quality, and power electronic applications Han Ju Cha received the B.S degree...

Ngày tải lên: 13/05/2014, 00:55

... 285 Power- supply rail rejection in amplifiers 286 A design philosophy for supply- rail rejection 288 Positive supply- rail rejection 289 Negative supply- rail ... Library Cataloguing-in-Publication Data Self, Douglas Audio power amplifier design handbook – 5th ed Audio amplifiers Design Power amplifiers Design I Title 621.3’81535—dc22 Library of Congress Control ... Public address Printed-circuit board Probability density function Power partition diagram Power- supply rejection ratio Power- supply unit Pulse width modulation Radio frequency Slew-induced distortion...

Ngày tải lên: 29/05/2014, 14:21