A 4-/spl mu/a quiescent-current dual-mode digitally controlled buck converter IC for cellular phone applications

Xiao, Jinwen; Peterchev, Angel V.; Zhang, Jianhui; Sanders, S.R.

doi:10.1109/jssc.2004.836353

Cited by 211 publications

(8 citation statements)

References 11 publications

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“…Compared to Ref. [8], the light load conversion efficiency is lower, because the quiescent current is higher due to more accurate DPWM resolution and the saturation region operation of ADC oscillators in this work. Light load efficiency can be improved in further work by decreasing the quiescent current and turning off unused blocks completely in PSM mode, such as the DPWM and the ADC.…”

Section: Resultsmentioning

confidence: 90%

A digitally controlled PWM/PSM dual-mode DC/DC converter

Zhen¹,

Zhang²,

Luo³

et al. 2011

J. Semicond.

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A digitally controlled pulse width modulation/pulse skip modulation (PWM/PSM) dual-mode buck DC/DC converter is proposed. Its operation mode can be automatically chosen as continuous conduction mode (CCM) or discontinuous conduction mode (DCM). The converter works in PSM at DCM and in 2 MHz PWM at CCM. Switching loss is reduced at a light load by skipping cycles. Thus high conversion efficiency is realized in a wide load current. The implementations of PWM control blocks, such as the ADC, the digital pulse width modulator (DPWM) and the loop compensator, and PSM control blocks are described in detail. The parameters of the loop compensator can be programmed for different external component values and switching frequencies, which is much more flexible than its analog rivals. The chip is manufactured in 0.13 m CMOS technology and the chip area is 1.21 mm 2 . Experimental results show that the conversion efficiency is high, being 90% at 200 mA and 67% at 20 mA. Meanwhile, the measured load step response shows that the proposed dual-mode converter has good stability.

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Section: Resultsmentioning

confidence: 90%

A digitally controlled PWM/PSM dual-mode DC/DC converter

Zhen¹,

Zhang²,

Luo³

et al. 2011

J. Semicond.

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show abstract

“…Table 2 presents a performance comparison of the current design with some of the prior designs. Refs [3,[28][29][30][31] are inductive converters while [8,[32][33][34] are capacitive converters. The design presented here is the only hybrid converter design having both capacitive and inductive converters connected in parallel.…”

Section: Measurement Resultsmentioning

confidence: 99%

A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor

Kudva

Chaubey

Harjani

2016

JLPEA

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“…Modern power supplies must do this at high efficiency even at low-output powers, and they must consume virtually no power in the no-load condition. In order for this to be possible, power supplies modulate both the duty cycle and the frequency of the switching to minimize wasted energy and maximize overall performance [18]. The duty cycle can be used as a proxy for the power passing through the supply for a given input voltage.…”

Section: A Principles Of Operationmentioning

confidence: 99%

Communicating Power Supplies: Bringing the Internet to the Ubiquitous Energy Gateways of Electronic Devices

Lanzisera

Weber

Liao

et al. 2014

IEEE Internet Things J.

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Saving energy in buildings is often hampered by the lack of detailed information about what is using the energy, how much it is using, and how to automatically and remotely control devices. The problem is especially acute for the large number of small, energy-using devices that are present in both residential and commercial buildings. Most of these products use a switching ac to dc power supply to operate electronic and other internal components. We describe a "communicating power supply" (CPS) to enable the communication of energy and control information between the device and a building management system or other central entities. We developed a proof-of-concept system of Internetconnected CPSs and demonstrated both energy reporting and control utilizing a custom, cloud-based information clearing house. If CPS technology became widespread in devices, a combination of automated and human interactive solutions would enable high levels of energy savings.

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A 4-/spl mu/a quiescent-current dual-mode digitally controlled buck converter IC for cellular phone applications

Cited by 211 publications

References 11 publications

A digitally controlled PWM/PSM dual-mode DC/DC converter

A digitally controlled PWM/PSM dual-mode DC/DC converter

A 4.1 W/mm2 Hybrid Inductive/Capacitive Converter for 2–140 mA-DVS Load under Inductor

Communicating Power Supplies: Bringing the Internet to the Ubiquitous Energy Gateways of Electronic Devices

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