Design of Peak Efficiency of 85.3% WPC/PMA Wireless Power Receiver Using Synchronous Active Rectifier and Multi Feedback Low-Dropout Regulator

Khan, Zaffar Hayat Nawaz; Park, Young-Jun; Oh, Seong Jin; Jang, Byeong Gi; Park, Seong-Mun; Abbasizadeh, Hamed; Pu, Young Gun; Hwang, Keum Cheol; Yang, Youngoo; Lee, Minjae; Lee, Kang-Yoon

doi:10.3390/en11030479

Cited by 4 publications

(3 citation statements)

References 16 publications

(15 reference statements)

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“…The wireless charging technology is a combination of wireless earphones, a device to device charging, and home applications as well as mobile phones. The wireless charging technology market is forecasted to continue to grow by more than $11.8 billion by 2020 after being applied to military products, electric vehicles, drones, and hydrogen power equipment [13]- [19].…”

Section: Introductionmentioning

confidence: 99%

A High-Efficiency Triple-Mode Active Rectifier With Gate Charge Recycling Technique for Wireless Power Transfer System

et al. 2022

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This paper presents an active rectifier design with a gate charge recycling technique. Gate switching increases the switching losses of the active rectifier, therefore, as a way to reduce switching losses, the gate charge recycling technique is proposed. The output power of 15 W is achieved to enable rapid charging using the three standards for wireless charging mode, magnetic induction (WPC and PMA), and magnetic resonance (A4WP). Power-sharing is used to lower the amount of power consumed by each standard mode core. In WPC, and PMA mode zero current sensing (ZCS) technique has been used while in the A4WP mode, the digitally controlled delay adjustment (DCDA) technique has been employed. By using a gate charge recycling block, the efficiency has been considerably improved due to the lower power consumption. It aims to increase the overall efficiency by reusing switching loss using the gate charge recycling block, and it has effectiveness by allowing three standard modes to operate with one single chip. The proposed design combines charge-recycling with zero current sensing techniques to improve power efficiency. The layout size is 4.75 µm 2 . The achieved efficiency is 98.6 % in the magnetic induction method (WPC/PMA) at 15 W, and 94.86 % in the magnetic resonance method (A4WP) with an output power level of 15 W. The chip is fabricated in the BCD 0.18 µm CMOS process.INDEX TERMS Active rectifier, deglitch circuit, gate charge recycling, high efficiency, switching loss, wireless power transfer system, zero current sensing.

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Section: Introductionmentioning

confidence: 99%

A High-Efficiency Triple-Mode Active Rectifier With Gate Charge Recycling Technique for Wireless Power Transfer System

et al. 2022

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“…An exhaustive theoretical discussion on this topic is given for example in . The authors usually build their mathematical models based on the equivalent electrical circuit method using linear equations with lumped electrical parameters, but only few of them consider also the parasitic effects (e.g., [12][13][14][15][16]). Another frequently proposed approach is to describe the system behaviour while using electromagnetic field calculated through the finite element analysis [28][29][30][31][32][33][34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

High Efficiency and Power Tracking Method for Wireless Charging System Based on Phase-Shift Control

et al. 2018

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The paper presents optimal operating point tracking algorithm for wireless charging system using identical coupling coils providing us to meet simultaneously high efficiency and high transmitted power under varied load and detuning conditions. The proposed method is suitable either for purely resistive load or battery load and it is based on phase-shift control between the primary and the secondary voltage. The paper also gives an intuitive mathematical description of the key control idea and demonstrates its operational abilities. The proposed algorithm is finally implemented into digital signal processor (DSP) and tested on 4 kW laboratory prototype of shielded wireless power transfer system.

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“…This enables a cost-effective small form factor, which typically cannot be offered with inductor-based buck converters, where one of the following is required: a bulky off-chip inductor [6][7][8]; an expensive on-chip inductor [9,10]; or a complicated post-fabrication process [11]. The large conversion ratio requirement also prohibits the use of low dropout regulators (LDOs) in such systems since the efficiency of an LDO is proportional to its conversion ratio [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

A Wide Load Current and Voltage Range Switched Capacitor DC–DC Converter with Load Dependent Configurability for Dynamic Voltage Implementation in Miniature Sensors

Saif

Lee

et al. 2018

Energies

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Advancements in low power circuits and batteries have enabled the design of miniature sensors with tiny batteries. In such systems, implementing dynamic voltage scaling (DVS) is crucial for maximizing system lifetime. In this paper, a new switched capacitor (SC) converter that is capable of handling a wide range of load currents and output voltages is presented for on-chip DVS implementation. The proposed converter consists of multi-ratio multi-leaf SC stages and reconfigurable interconnect, enabling fine voltage resolution. The stage interconnect scheme enables cascaded or parallel connection of stages. The multi-leaf structure allows load-dependent switch size selection, offering a better trade-off between losses over a wide load range. A limited-voltage-swing switch-driving scheme allows efficient down-conversion from high battery voltage input. A prototype was fabricated in a 180 nm process, providing an output voltage with effective resolution of 16 mV over a load current range of 300 nA to 300 μA (1000×) from a 4 V battery. Efficiency greater than 62% and a peak efficiency of 77% are achieved under a light load (500 nA) over a voltage range of 400 mV to 1.6 V. Efficiency greater than 64% and a peak efficiency of 72% are achieved under a heavy load (200 μA) over a voltage range of 700 mV to 1.6 V.

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Design of Peak Efficiency of 85.3% WPC/PMA Wireless Power Receiver Using Synchronous Active Rectifier and Multi Feedback Low-Dropout Regulator

Cited by 4 publications

References 16 publications

A High-Efficiency Triple-Mode Active Rectifier With Gate Charge Recycling Technique for Wireless Power Transfer System

A High-Efficiency Triple-Mode Active Rectifier With Gate Charge Recycling Technique for Wireless Power Transfer System

High Efficiency and Power Tracking Method for Wireless Charging System Based on Phase-Shift Control

A Wide Load Current and Voltage Range Switched Capacitor DC–DC Converter with Load Dependent Configurability for Dynamic Voltage Implementation in Miniature Sensors

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