Adaptive Peak-Inductor-Current-Controlled PFM Boost Converter With a Near-Threshold Startup Voltage and High Efficiency

Wu, Hung Hsien; Wei, Chia-Ling; Hsu, Yu Chen; Darling, Robert M.

doi:10.1109/tpel.2014.2323895

Cited by 52 publications

(18 citation statements)

References 32 publications

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“…Fig. 10(b) shows the circuit of high voltage selector, which is modified from the circuit in [25]. Rather than traditional gate terminals, the source terminals are used as the inputs in the comparing stage.…”

Section: A Small-signal Analysismentioning

confidence: 99%

98.1%-Efficiency Hysteretic-Current-Mode Noninverting Buck–Boost DC-DC Converter With Smooth Mode Transition

Hong

Wei

2017

IEEE Trans. Power Electron.

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 Abstract-A non-inverting buck-boost dc-dc converter can work in buck, boost, or buck-boost mode. Hence, it provides a good solution when input voltage may be higher or lower than output voltage. However, a buck-boost converter requires four power transistors, rather than two. Therefore, its efficiency decreases, due to the conduction and switching losses of the two extra power transistors. Another issue of a buck-boost converter is how to smoothly switch its operational mode, when its input voltage approaches its output voltage. A hysteretic-current-mode non-inverting buck-boost converter with high efficiency and smooth mode transition is proposed, and it was designed and fabricated using TSMC 0.35 μm CMOS 2P4M 3.3V/5V mixed-signal polycide process. The input voltage may range from 2.5 to 5 V, the output voltage is 3.3 V, and the maximal load current is 400 mA. According to the measured results, the maximal efficiency reaches 98.1%, and the efficiencies measured in the entire input voltage and loading ranges are all above 80%.

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Section: A Small-signal Analysismentioning

confidence: 99%

98.1%-Efficiency Hysteretic-Current-Mode Noninverting Buck–Boost DC-DC Converter With Smooth Mode Transition

Hong

Wei

2017

IEEE Trans. Power Electron.

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“…The frequency of the adaptive on‐time boost converter is not constant, so their switching loss is high and the efficiency is low. Therefore, the efficiency of the proposed boost converter is lower than the efficiencies of the boost converter in other studies, but it is still higher than the efficiencies of the boost converter in . When the load current is changed from 5 to 300 mA and from 300 to 5 mA, the measured transient response time is about 2 and 3 μs, respectively, which are the faster than the other works.…”

Section: Resultsmentioning

confidence: 67%

“…Therefore, the efficiency of the proposed boost converter is lower than the efficiencies of the boost converter in other studies, 9,20 but it is still higher than the efficiencies of the boost converter in. 8,16 When the load current is changed from 5 to 300 mA and from 300 to 5 mA, the measured transient response time is about 2 and 3 μs, respectively, which are the faster than the other works. Thus, the proposed boost converter provides fast-transient response and high efficiency.…”

Section: Resultsmentioning

confidence: 79%

A high‐efficient fast‐transient boost converter with adaptive on‐time controlled and zero‐current–detection techniques

Chen

Hwang

Chen

et al. 2019

Circuit Theory & Apps

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Summary A high‐efficient fast‐transient boost converter with adaptive on‐time controlled and zero‐current–detection techniques is presented in this paper. The adaptive on‐time controlled technique can rapidly reach desired output voltage in two to three switching cycles. The proposed boost converter uses a zero‐current–detector to detect and prevent the negative inductor current issue that can decrease the light‐load power consumption and increase the light‐load efficiency. Therefore, this new configuration accelerates transient response and improves light‐load efficiency of the boost converter. The proposed boost converter has been fabricated with Taiwan Semiconductor Manufacturing Company (TSMC) 0.18‐μm Complementary Metal‐Oxide‐Semiconductor (CMOS) 1P6M technology, and the chip area is only 1.148 × 1.187 mm (including personal assistant devices [PADs]). The input voltage range is from 0.5 to 1 V, and the output voltage is 1.8 V. The measured transient response time is about 2 and 3 μs, when the load current is changed from 5 to 300 mA and from 300 to 5 mA, respectively. The converter's operating frequency is 1 MHz, the maximum output current is 300 mA, and the peak power efficiency is 91.6% under 200‐mA load current. The experimental results confirm that the light‐load efficiency of the converter can be increased 11%.

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“…In the range of the light load (less than 100 mA), the maximum power efficiency improvements occurring at a load current of 20 mA are 16.3% and 5.0% compared to the conventional full-swing and low-swing buck converters, respectively. Table I summarizes the measured performances and design specifications of the proposed, conventional low-swing [4], variable frequency control [5], pulse-frequency-control (PFM) [6,8], adaptive gate swing control [13], charge-recycling [15,16] and switched capacitor hybrid [18] DC-DC converters. Compared to conventional works, the proposed buck converter has a wide range of output voltage from 1.2 V to 2.3 V and can be used in applications requiring various output voltages.…”

Section: Gatementioning

confidence: 99%

“…Various design techniques have been reported for reducing the switching loss. Pulse frequency modulation (PFM) [5][6][7][8], pulse skip mode [9] and burst-mode scheme [10] are several representative frequency control techniques. However, they have poor output regulation and experience the electromagnetic interference (EMI) noise problem.…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency DC–DC Converter with Charge-Recycling Gate-Voltage Swing Control

2019

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This paper proposes a high-efficiency DC–DC converter with charge-recycling gate-voltage swing control with a light load. By achieving a variable gate-voltage swing in a very efficient manner by charge recycling, the power efficiency has been substantially improved due to the lower power consumption and the achieved balance between the switching and conduction losses. A test chip was fabricated using 65-nm CMOS technology. The proposed design reduces the gate-driving loss by up to 87.7% and 47.2% compared to the conventional full-swing and low-swing designs, respectively. The maximum power conversion efficiency was 90.3% when the input and output voltages are 3.3 V and 1.8 V, respectively.

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Adaptive Peak-Inductor-Current-Controlled PFM Boost Converter With a Near-Threshold Startup Voltage and High Efficiency

Cited by 52 publications

References 32 publications

98.1%-Efficiency Hysteretic-Current-Mode Noninverting Buck–Boost DC-DC Converter With Smooth Mode Transition

98.1%-Efficiency Hysteretic-Current-Mode Noninverting Buck–Boost DC-DC Converter With Smooth Mode Transition

A high‐efficient fast‐transient boost converter with adaptive on‐time controlled and zero‐current–detection techniques

High-Efficiency DC–DC Converter with Charge-Recycling Gate-Voltage Swing Control

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