NDLI: Design of a high-precision constant voltage flyback converter

Content Provider	IET Digital Library
Author	Wang, Lei Wu, Qian Gu, Yang Chang, Changyuan Chen, Chang
Abstract	A small-signal model is established for the basic constant voltage (CV) flyback converter firstly. Then the phase margin and the bandwidth, which can reflect the system stability and rapidity, are deduced through transfer function. The parameters affecting the stability of the system can be obtained by the model's derivation to confirm the appropriate external capacitance value. To improve the precision of CV, the compensation of cable is implemented through the module of irrigation current, pulling down the output voltage under any load conditions to the value of it with the maximal load. The prototype for the proposed CV converter has been fabricated in an MXIC 0.8 μm L80A1 process. The minimal static power consumption measured by a test is only 40 mW. In the CV mode, the precision of the output voltage can reach the level of ±1.5%. Therefore, the proposed control chip has a promising application in low power CV AC–DC flyback converter.
Starting Page	1145
Ending Page	1152
Page Count	8
ISSN	1751858X
Volume Number	14
e-ISSN	17518598
Issue Number	Issue 8, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cds/14/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cds.2020.0011
Journal	IET Circuits, Devices & Systems
Publisher Date	2020-04-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC-DC Power Converter Cable Compensation Constant Current Sources Control Chip Electrical/electronic Equipment Energy Utilisation External Capacitance Value High-precision Constant Voltage Flyback Converter Low Power CV AC–DC Flyback Converter Low Power Electronics MXIC L80A1 Process Power 40.0 MW Power Electronics Power Supply Size 0.8 Mum Small-signal Model Static Power Consumption Supervisory Circuit System Stability Transfer Function
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering

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