Variable frequency pulse density modulation for efficient high frequency operation of series resonant converters operating as voltage regulators

Tschirhart, D.J.; Jain, Praveen

doi:10.1109/apec.2010.5433402

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…Converter analysis has been performed in [10], so only pertinent results will be restated here. As illustrated in Fig …”

Section: Discussionmentioning

confidence: 99%

“…Equation (9) is obtained by isolating V TH in (7). The equation for the lower threshold voltage V TL is given in (10) and was found by simple manipulation and assuming one clock cycle delay in synchronizing with the digital clock. This implementation uses a free-running clock as a means of ensuring consistent switching periods without issues of startup transients.…”

Section: B Filter Capacitance and Hysteretic Bandmentioning

confidence: 99%

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Digital control of resonant converters at ultra high frequency

Tschirhart

Jain

2010

Intelec 2010

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Voltage regulators (VRs) powering microprocessors face stringent requirements on size; response; and efficiency. Current-type resonant converters, like the series resonant converter are particularly well-suited for these applications as they are able to achieve efficient high frequency operation, and have a capacitive output filter. However, despite their merits, they are often overlooked because of size and performance issues associated with their control. In this paper, variable frequency pulse density modulation (VF-PDM) control of the series resonant converter (SRC) is presented to enable resonant converter benefits to be realized in VR applications. It achieves efficient multi-megahertz switching frequency, ultra-fast transient response with minimal filter capacitance, and is inherently stable. It will be shown that with proper converter design, these benefits can be achieved with a simple, low clock rate digital controller.

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“…Converter analysis has been performed in [10], so only pertinent results will be restated here. As illustrated in Fig …”

Section: Discussionmentioning

confidence: 99%

Section: B Filter Capacitance and Hysteretic Bandmentioning

confidence: 99%

Digital control of resonant converters at ultra high frequency

Tschirhart

Jain

2010

Intelec 2010

Self Cite

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“…This is due to the discontinuous-conduction mode (DCM)-like operation of the converter which naturally maintains per-cycle charge balance between the input and the output [30], which in the GRSCC …”

Section: Voltage Regulationmentioning

confidence: 99%

Resonant Switched-Capacitor Voltage Regulator With Ideal Transient Response

Cervera

Peretz

2015

IEEE Trans. Power Electron.

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A new, small and efficient voltage regulator, realized using a resonant switched capacitor converter technology, is introduced. Voltage regulation is implemented by means of simple digital pulse density modulation. It displays an ideal transient response with a zero-order nature to all disturbance types. The newly developed topology acts as a gyrator with a wide range of voltage conversion ratios (below as well as above unity) with constant efficiency characteristics for the entire operation range. The operation of the voltage regulator is verified on a 20W experimental prototype, demonstrating ideal transient recovery without over/under-shoots in response to load and line transients. Simple design guidelines for the voltage regulation system are provided and verified by experiments. Index Terms-Switch-mode power supplies, switched capacitor converters, voltage regulation, pulse density modulation, digital control, ideal transient recovery I. 0885-8993 (c)

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Resonant switched-capacitor voltage regulator with ideal transient response

Cervera

Peretz

2014

2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014

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Variable frequency pulse density modulation for efficient high frequency operation of series resonant converters operating as voltage regulators

Cited by 7 publications

References 9 publications

Digital control of resonant converters at ultra high frequency

Digital control of resonant converters at ultra high frequency

Resonant Switched-Capacitor Voltage Regulator With Ideal Transient Response

Resonant switched-capacitor voltage regulator with ideal transient response

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