A 10-MHz 2–800-mA 0.5–1.5-V 90% Peak Efficiency Time-Based Buck Converter With Seamless Transition Between PWM/PFM Modes

Kim, Seong Joong; Choi, Woo-Seok; Pilawa-Podgurski, Robert C. N.; Hanumolu, Pavan Kumar

doi:10.1109/jssc.2017.2776298

Cited by 60 publications

(14 citation statements)

References 13 publications

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“…In DC-DC converters, light-load efficiency which is highly related to battery lifetime for portable devices, is much lower than heavy-load efficiency due to the higher ratio of power loss to output power at light-load [1,2,3,4]. On the other hand, DC-DC converters with high switching frequency at tens or hundreds of megahertz have obtained wide research attention, due to their advantages of high integration level and high power density [5,6,7,8]. However, high switching frequency also increases switching loss and harms efficiency especially light-load efficiency [9,10,11,12].…”

Section: Introductionmentioning

confidence: 99%

High frequency and high efficiency DC-DC converter with sensorless adaptive-sizing technique

Cheng

Shao

Zhang

et al. 2020

IEICE Electron. Express

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A high frequency and high efficiency DC-DC converter with sensorless adaptive-sizing technique is proposed. Instead of conventional adaptive-sizing technique with current sensor, the proposed converter estimates the load current according to the output voltage of error amplifier for switch scaling. The elimination of current sensor reduces power consumption, thus improving efficiency further. This design is validated through simulation in a 0.18 µm CMOS process. At switching frequency of 150 MHz and light-load of 20 mA, the proposed converter achieves a high efficiency of 82.4%, while it is 73.7% with conventional adaptivesizing technique, and 62.4% without adaptive-sizing technique.

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Section: Introductionmentioning

confidence: 99%

High frequency and high efficiency DC-DC converter with sensorless adaptive-sizing technique

Cheng

Shao

Zhang

et al. 2020

IEICE Electron. Express

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“…The wind turbine power and rectifier to battery output Eqs. from (1) to (12) in this mode are the same as that in mode-1 and mode-2, except for battery charging.…”

Section: Wind Power Output Mode (Mode-3)mentioning

confidence: 99%

“…In [12], Pulse frequency modulation (PFM) is proposed to improve the efficiency of converters. PWM based controllers are well equipped, but they have power loss in low power applications due to constant quiescent current.…”

Section: Introductionmentioning

confidence: 99%

BDC-based wind energy storage for multimode operating system

Raaj¹,

Suresh²,

Arulmozhiyal³

2018

MMC_A

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We mainly focus on to creating a different mode of operation in an energy storage system for an effective way of wind energy utilization. The proposed energy storage system consists of Bidirectional DC-DC Converter (BDC), which makes the system effective in order to overcome the issues in practical usage. The modes of operations are based on three essential parameters such as wind-turbine speed (v), battery level (%) and load position (s). Based on the parameters' magnitude, the main controller will choose an effective mode. The main controller is designed in such a manner that it must be capable of withstanding drastic conditions, must be robust, should monitor all parameters, and could maintain the stability of the system. The work is evaluated through MATLAB/Simulink environment. Finally, the real time prototype experimental results are compared with that of the simulation. In addition, the proposed system is applicable for commercial and domestic power-storage systems.

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“…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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A 10-MHz 2–800-mA 0.5–1.5-V 90% Peak Efficiency Time-Based Buck Converter With Seamless Transition Between PWM/PFM Modes

Cited by 60 publications

References 13 publications

High frequency and high efficiency DC-DC converter with sensorless adaptive-sizing technique

High frequency and high efficiency DC-DC converter with sensorless adaptive-sizing technique

BDC-based wind energy storage for multimode operating system

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

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