A new digital adaptive voltage positioning technique with dynamically varying voltage and current references

Pan, Shangzhi; Jain, Praveen

doi:10.1109/apec.2010.5433343

Cited by 2 publications

(4 citation statements)

References 11 publications

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“…One of the ripple components comes from the charge/discharge mechanism of capacitors in the switching converter as shown in (9). The other component is reflected by ESR, as shown in (10). Generally, output voltage ripple mainly comes from capacitors' ESR rather than the charge/discharge mechanism of capacitors.…”

Section: Shortening the Tuning Processmentioning

confidence: 99%

“…Based on the principle of triangular resemblance, the output ripple (ΔV Rc ) can be further estimated by (11). With the available ΔV Rc , a rough estimate of R i can be obtained by (10). It is noted that the ESR estimation algorithm is only used for a rough estimation of ESR value.…”

Section: Shortening the Tuning Processmentioning

confidence: 99%

“…To most mobile devices deem that area efficiency is highly important, saving the most capacitors that can use for maintaining operating voltage is the optimal goal. For this reason, several literatures proposed different methodologies to realise AVP [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. In analogue-based AVP design, the value of current sensing parameter (R i ) needs to be determined by the load-line resistor (R LL ), where R LL is defined by the voltage regulation (VR) specification related to the voltage allowable window.…”

Section: Introductionmentioning

confidence: 99%

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Power integrated circuit implementation of optimal adaptive voltage positioning scheme using progressive waveform shaping algorithm

Liu

Chang-Chien

2016

IET Power Electronics

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Adaptive voltage positioning (AVP) scheme is widely adopted in the high-load voltage regulation modules (VRMs) because it helps VRMs reducing almost half the number of output capacitors for the same design without using AVP. The AVP scheme is claimed to be optimal if its voltage transient behaviour is linear by tuning the current sensing parameter (R i) to match the value of the output capacitor equivalent series resistor (ESR). In this study, a progressive waveform-shaping method is proposed to automatically achieve optimal AVP for the VRMs without manually setting the optimal R i. Hence, as long as a proper ESR of the output capacitor is determined, VRM designers can use the least output capacitor numbers to obtain the optimal AVP waveform. The proposed method is especially appealing for the power integrated circuit application. The overall controller design was implemented by the Taiwan semiconductor manufacturing company (TSMC) 0.18 μm manufacturing process. In the real implementation, an AVP-based buck converter was devised to perform 5 μs linear transient in response to the 10 A/5 μs load current step at 1.2 V output voltage. Test of the circuit shows that the AVP performance is comparable to those state of the art.

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Section: Shortening the Tuning Processmentioning

confidence: 99%

Section: Shortening the Tuning Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Power integrated circuit implementation of optimal adaptive voltage positioning scheme using progressive waveform shaping algorithm

Liu

Chang-Chien

2016

IET Power Electronics

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“…In [11], a new digital adaptive voltage positioning (digital AVP) technique was proposed (US patent pending), which used two low-speed and low-resolution digital-to-analog converters (DAC) instead of two high-speed high-resolution analog-to-digital converters, thus significantly reducing system complexity and die area. Different from other control methods (the output voltage tracks the voltage reference), the generated voltage reference is always trying to track the output voltage.…”

Section: Introductionmentioning

confidence: 99%

Stability analysis and large signal behavior of a high performance voltage regulator with non-linear multi-mode digital control

Pan

Jain

2010

Intelec 2010

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A novel digital adaptive voltage positioning (digital AVP) technique was proposed in [11]. Good transient performance had been achieved without using complicated control. In this paper, a small signal model is proposed for this mixed-signal digital controller. It is revealed by this small signal model that the inner current loop is in analog and the voltage loop is in digital, thus the controller can benefit from both: having valuable features of digital control but without limitations such as limit cycle. On the other hand, dynamic behavior of the voltage regulator with this digital AVP controller under large load transient is analyzed. With optimized bandwidth designed for switching stability, the VR with the digital AVP controller exhibits very excellent dynamic performance because of non-linear multi-mode control.

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A new digital adaptive voltage positioning technique with dynamically varying voltage and current references

Cited by 2 publications

References 11 publications

Power integrated circuit implementation of optimal adaptive voltage positioning scheme using progressive waveform shaping algorithm

Power integrated circuit implementation of optimal adaptive voltage positioning scheme using progressive waveform shaping algorithm

Stability analysis and large signal behavior of a high performance voltage regulator with non-linear multi-mode digital control

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