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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Svikovic, V. Oliver, J.A. Alou, P. Garcia, O. Cobos, J.A. |
| Copyright Year | 2012 |
| Description | Author affiliation: Centro de Electrónica Industrial, Universidad Politécnica de Madrid, Madrid, Spain (Svikovic, V.; Oliver, J.A.; Alou, P.; Garcia, O.; Cobos, J.A.) |
| Abstract | This work is related to the improvement of the output impedance of the Buck converter by means of introducing an additional power path that virtually increases the output capacitance during transients. It is well known that in VRM applications, with wide load steps, voltage overshoots and undershoots may lead to undesired performance of the load. To solve this problem, high-bandwidth high-switching frequency power converters can be applied to reduce the transient time or a big output capacitor can be applied to reduce the output impedance. The first solution can degrade the efficiency by increasing switching losses of the MOSFETS, and the second solution is penalizing the cost and size of the output filter. The Output Impedance Correction Circuit (OICC), as presented here, is used to inject or extract a current n−1 times larger than the output capacitor current, thus virtually increasing n times the value of the output capacitance during the transients. This feature allows the usage of a low frequency Buck converter with smaller capacitor but satisfying the dynamic requirements. |
| Starting Page | 727 |
| Ending Page | 734 |
| File Size | 1412829 |
| Page Count | 8 |
| File Format | |
| ISBN | 9781457712159 |
| e-ISBN | 9781457712166 |
| e-ISBN | 9781457712142 |
| DOI | 10.1109/APEC.2012.6165900 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-02-05 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Capacitors Transient analysis Regulators Impedance Voltage control Capacitance |
| Content Type | Text |
| Resource Type | Article |
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