Digitally controlled GaN‐based MHz active clamp flyback converter with dynamic dead time optimisation for AC–DC adapter

Gu, Donglie; Xi, Jianxiong; He, Lenian

doi:10.1049/iet-pel.2020.0464

Cited by 6 publications

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After setting an optimal deadtime for the buck converter, the zero-voltage switching condition would occur [51]. In this condition, the available charge in the C eq is discharged by converter's inductance before turning-on the LSS.…”

Section: Optimal Deadtime Mathematical Analysismentioning

confidence: 99%

See 1 more Smart Citation

A 9.2-ns to 1-s Digitally Controlled Multituned Deadtime Optimization for Efficient GaN HEMT Power Converters

Karimi
¹
,

Ali
²
,

Aghajani
³

et al. 2022

IEEE Trans. Circuits Syst. I

6
0
0
0

View full text Add to dashboard Cite

This paper presents a tunable new deadtime control circuit providing an optimal delay for power converter optimization. Our method can reduce the deadtime loss while improving the efficiency and power density of a given power converter. The circuit presents a reconfigurable delay element to generate a wide range of deadtime for different power conversion applications with varying loads and input voltages. The optimal deadtime equation for buck converters is derived, and its dependency on the input voltage and load is discussed. Experimental results show that the presented circuit can provide a wide range of deadtime delays, ranging from 9.2 ns to 1000 ns. The power consumption of the presented circuit is measured for different capacitive loads (C L ) and operating frequencies ( f s ). The circuit consumed a power between 610 µW and 850 µW across the measured deadtime ranges while C L = 12 pF, V dd = 3.3 V, and f s = 200 kHz. The proposed deadtime generator can operate up to 18 MHz when the minimum deadtime of 9.2 ns is selected. The presented circuit occupies an area of 150µ m × 260µm. The fabricated chip is connected to a buck converter to validate the operation of the proposed circuit. The efficiency of a typical buck converter with minimum T DLH and optimal T DHL at I Load = 25 mA is improved by 12% compared to a converter with a fixed deadtime of T DLH = T DHL = 12 ns.

show abstract

Section: Optimal Deadtime Mathematical Analysismentioning
confidence: 99%

“…The additional circuit required to measure the potential of V SW can also affect the power density and increase the cost. A dynamic deadtime optimization technique for a power converter is presented in [51]. In this approach, an additional circuit was placed in parallel with the LSS, which affects the performance of LSS.…”

Section: Introductionmentioning
confidence: 99%

A 9.2-ns to 1-s Digitally Controlled Multituned Deadtime Optimization for Efficient GaN HEMT Power Converters
Karimi
¹
,
Ali
²
,
Aghajani
³

et al. 2022
IEEE Trans. Circuits Syst. I
6
0
0
0
View full text Add to dashboard Cite

show abstract

Application of Large System Optimisation Techniques and Improved Genetic Algorithms to the Optimal Allocation of Water Resources
Zhen
¹
,
Zhang
²

2022
Cyber Security Intelligence and Analytics
0
0
0
0
View full text Add to dashboard Cite

Active Clamp Flyback Converter with Variable Resonant Modes
Zhang
¹
,
Zhang
²
,
Yang
³

et al. 2023
Lecture Notes in Electrical Engineering
0
0
0
0
View full text Add to dashboard Cite

Digitally controlled GaN‐based MHz active clamp flyback converter with dynamic dead time optimisation for AC–DC adapter

Cited by 6 publications

References 23 publications

A 9.2-ns to 1-s Digitally Controlled Multituned Deadtime Optimization for Efficient GaN HEMT Power Converters

A 9.2-ns to 1-s Digitally Controlled Multituned Deadtime Optimization for Efficient GaN HEMT Power Converters

Application of Large System Optimisation Techniques and Improved Genetic Algorithms to the Optimal Allocation of Water Resources

Active Clamp Flyback Converter with Variable Resonant Modes

Contact Info

Product

Resources

About