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USING TWO-INPUT BUCK POST-REGULATOR TO OBTAIN HIGH QUALITY FLYBACK POWER FACTOR CORRECTOR
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| Author(s) |
M. M. Hernando; P. Villegas; J. Sebastian; F. Nuno |
| Abstract |
A new method to improve dynamic response of Power Factor Correctors (PFCs) is developed in this paper and applied to a Flyback PFC. The method is based on the use of a very high efficient post-regulator with two inputs instead of only one. This two-input postregulator
(called Two-Input Buck, TIBuck) exhibits very high efficiency due to the fact that
only a part of the total power undergoes a power conversion process. This post -regulator needs a two-output PFC at its inputs, which can easily obtained in PFCs with transformers such as
Flyback or Sepic PFCs. A prototype of a Flyback PFC with a TIBuck post-regulator has been designed and optimized to be used in a 200W distributed power supply system for telecom. As a result, a reduction of 16 times in the bulk capacitor has been achieved with a efficiency penalty of only 0.97. With the use of the Average Current Mode Control, lower bulk capacitors can be used to obtain a very low voltage ripple at the output. |
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| Filename: | Unnamed file |
| Filesize: | 557.5 KB |
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| Type |
Members Only |
| Date |
Last modified 2016-03-09 by System |
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