Dissertation > Excellent graduate degree dissertation topics show

Analysis and Design of Flyback Feedback from the Oirginal Edge of a SMPS IC

Author: MuYi
Tutor: ZhangTao
School: Wuhan University of Science and Technology
Course: Circuits and Systems
Keywords: primary side feedback bandgap reference frequency shuffling sampling andholding circuit soft-start
CLC: TN86
Type: Master's thesis
Year: 2012
Downloads: 188
Quote: 0
Read: Download Dissertation

Abstract


Since switching power supply has been invented in1950s, its application has comegradually from space to people’s lives. It is at everywhere, such as Chargers, adapters, auxiliarypower supply, lamps, street lights and so on. With the switching power supply toward fourdirection of the development of high efficiency, small size and high frequency, EMI andswitching loss which restrict the development of switching power supply are becoming abottleneck. To reduce the impact of these issues, frequency shuffling, power factor correction,synchronous rectification which improve further the efficiency of the switching power supplychip are adopted. With the growing popularity of consumer electronics products, the marketdemand for the switching power supply is also increasing. Low-power and high efficiencyswitching power supply products can be widely applied.A primary-side flyback switching power supply chip which is based on1um40V ofHuahong high pressure technology library is designed. To reduce the circuit size, the primaryside feedback technology to replace feedback loop which is based on chip PC817and the TL431is adopted, but also put forward higher requirements for the flyback transformer. Except thebuilt-in overvoltage and overcurrent protection circuits, the chip also embedded in the frequencyshuffling module to reduce circuit EMI effect.This chip is different from other primary-side chipwhich sample stability of the feedback voltage after it was filtered, it directly sample thetransformer auxiliary winding voltage through resistor divider. So it makes chip’s built-insampling and holding circuit have higher requirements that it must accurately sample thestability of the voltage of a short time before the falling edge of output waveform.The design and simulation of various functional modules of the chip is completed.

Related Dissertations

  1. Grid-Side Converter Control and Wind Turbine Emulator in Direct Drive Wind Power System,TM46
  2. Saw motor energy-saving controller for tilting sand stone processing DSP-based research and development,TM343
  3. The Research of Fuzzy Adaptive Soft Start Control on AC Asynchronous Motor,TM343
  4. The Research of Solid-state Soft Starter Based on MC9S12 Micro Controller Unit,TM573
  5. Development and Application of Direct-Drive Screw Pumping Unit Driving System,TE938
  6. Design of Ultra-high Voltage Two-Stage Regulator,TM44
  7. The Start Designs of Large Capacity Motor,TM343
  8. Belt variable speed drive systems research,TH222
  9. With soft start function without arc contactor research,TM572
  10. The Research of Soft Start Based on Weightiness Load on the Double-variable Ac-Ac Converter,TM921.51
  11. The Design of an AC-DC PWM Controller IC Based on BCD Technology,TM46
  12. Study on Magnet-Control Reactor Soft-Starter of AC Motor Based on DSP,TM573
  13. Design and Implementation of a monolithic integrated AC / DC switching power supply chip,TN492
  14. Design of AC/DC Power Management Ic Based on BCD Technology,TN492
  15. The Design of the Gantry and Attachments Testing Platform,TH242
  16. Design and Realization of Constant Voltage Loop for AC-DC Converter Based on Principle of PSR,TN86
  17. Efficient study design flyback converters based on modulation of the PWM / PSM,TN792
  18. Design and realization of a low -power AC-DC chip,TN402
  19. A Constant Current/Constant Voltage Output AC-DC Controller Design,TM571
  20. The Analysis and Design of a High Performance Bandgap Reference,TN432
  21. The Design and Implementation of a 12 Bits 100ksps SAR ADC Based on 0.35um Mixed-signal CMOS Technology,TN792

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Power supply
© 2012 www.DissertationTopic.Net  Mobile