Digital charge balance controller with an auxiliary circuit for superior unloading transient performance of Buck converters

Meyer, E.; Wang, Dong; Jia, Liang; Liu, Yanfei

doi:10.1109/apec.2010.5433681

Cited by 22 publications

(10 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fig. 8 shows the waveform of the stepping-up iO and corresponding iL1+iL2 of the proposed method, controlled auxiliary current (CAC) scheme [19]- [21], and current-programmed mode (CPM) scheme [22]- [24] with the same L2 and ∆td. Obviously, the area A1 determines ∆vO.…”

Section: B Envelope Considering Time Delaymentioning

confidence: 99%

“…In this section, the estimated power losses of the auxiliary converters are compared. The CAC [19]- [21] and CPM [22]- [24] schemes were again selected as the conventional counterparts due to their similarity to the proposed control: nonresistive auxiliary circuits and the auxiliary current that is controlled to satisfy CCB. All conditions except that the constant switching frequency of the CAC and CPM is 2 MHz were held the same with the proposed method for a fair comparison.…”

Section: Estimated Power Loss Of the Auxiliary Convertermentioning

confidence: 99%

“…This concept was later extended to the multiphase buck converter with the peak current mode (PCM) control [17]- [18]. Works shown in [19]- [21] control the average current of the auxiliary inductor to secure CCB during the load transient. An adaptive slope control discussed in [22]- [24] also maintains the CCB to further improve the load transient response.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Implementation of Soft-Switching Auxiliary Current Control for Faster Load Transient Response

et al. 2021

View full text Add to dashboard Cite

Section: B Envelope Considering Time Delaymentioning

confidence: 99%

Section: Estimated Power Loss Of the Auxiliary Convertermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Implementation of Soft-Switching Auxiliary Current Control for Faster Load Transient Response

et al. 2021

View full text Add to dashboard Cite

“…6) Solutions in [18]- [20] depend on the estimation of the amplitude of the load step based on the output voltage behavior which may lead to the unpredicted behavior of the system if the prediction is not performed correctly. 7) Solutions in [19], [21]- [23] rely on the prediction of the timings for the charge balance of the output capacitor, which are dependent on converter parameters and tolerances. If the timings are estimated wrongly, it may cause undesired behavior of the system.…”

Section: Introductionmentioning

confidence: 99%

Synchronous Buck Converter With Output Impedance Correction Circuit

Šviković

Oliver

Alou

et al. 2013

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

This study 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 voltage regulation module applications, with wide load steps, voltage overshoots and undershoots may lead to undesired performance of the load. To solve this problem, high-bandwidth high-switchingfrequency 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, 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.Index Terms-Additional energy path, output impedance, synchronous buck converter, virtual output capacitor.

show abstract

“…Solutions in [15], [17] and [18] rely on the prediction of the timings for the charge balance of the output capacitor, which are dependent on converter parameters and tolerances. If the timings are estimated wrongly it may cause undesired behavior of the system.…”

Section: Introductionmentioning

confidence: 99%

Synchronous Buck converter with Output Impedance Correction Circuit

Svikovic

Óliver

Alou

et al. 2012

2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

View full text Add to dashboard Cite

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.

show abstract

Digital charge balance controller with an auxiliary circuit for superior unloading transient performance of Buck converters

Cited by 22 publications

References 22 publications

Implementation of Soft-Switching Auxiliary Current Control for Faster Load Transient Response

Implementation of Soft-Switching Auxiliary Current Control for Faster Load Transient Response

Synchronous Buck Converter With Output Impedance Correction Circuit

Synchronous Buck converter with Output Impedance Correction Circuit

Contact Info

Product

Resources

About