Inductor Current Zero-Crossing Detector and CCM/DCM Boundary Detector for Integrated High-Current Switched-Mode DC–DC Converters

Michal, Vratislav

doi:10.1109/tpel.2013.2292600

Cited by 38 publications

(5 citation statements)

References 10 publications

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“…Disconnect the power transistor to avoid inductor current backflow or transistor body diode conduction. It is necessary to design a suitable zero current detector circuit and a suitable comparator offset voltage to improve the accuracy of the zero current detector circuit and even the entire buck circuit, reduce the circuit power consumption, and improve circuit performance [25,26,27].…”

Section: Architecture Of Wide Input Voltage Range Dc-dc Buck Convertermentioning

confidence: 99%

A wide input voltage range DC-DC Buck converter with dynamically modified ZCD circuit

Lin,

Chai,

Fan

et al. 2024

IEICE Electron. Express

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This article proposes a wide input voltage range DC-DC buck converter based on AOT control mode, which can be used in lowpower applications such as the Internet of Things and automotive chips. It includes a zero current detector circuit that dynamically modifies the offset voltage, which can detect the inductor current when the buck circuit is operating in DCM mode. By turning off the power transistor in time, the control loss of the buck circuit can be reduced to improve efficiency. The proposed buck converter is designed using 0.18μm standard CMOS process. When a 12V standard input voltage is used to generate a 5V output voltage, the minimum inductor current can reach about 100uA when the low power transistor is turned off when the load current is in the light load range of 1mA-100mA, and the maximum efficiency can be achieved at light load of 93.7%.

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Section: Architecture Of Wide Input Voltage Range Dc-dc Buck Convertermentioning

confidence: 99%

A wide input voltage range DC-DC Buck converter with dynamically modified ZCD circuit

Lin,

Chai,

Fan

et al. 2024

IEICE Electron. Express

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“…The threshold voltage requires high precision. (2) Detecting the zero current of the inductor current by a ZCD (zero-cross detector) circuit and turning off the freewheeling switch [9][10][11]. (3) Using the voltage-second balance method [6,12,13].…”

Section: Introductionmentioning

confidence: 99%

New Fixed-Frequency Digital Control to Improve the Light-Load Efficiency of an Isolated Regulated Converter

Wang

et al. 2023

Electronics

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With the development of environmental and economic requirements, the light-load efficiency of DC/DC converters is increasingly important. However, many isolated regulated converters still use fixed-frequency control, which has low light-load efficiency. This paper proposes a new digital control method to improve the light-load efficiency under fixed-frequency control. On the one hand, new gate-drive timing control is proposed to achieve the soft-switching of the primary switch. On the other, the software voltage–second balance method realizes the synchronous rectification in the discontinuous conduction mode, which reduces the conduction loss. The diagram and workflow of the proposed control scheme are demonstrated at length. A 100-Watt prototype was designed, and the test results show that synchronous rectification and quasi-zero-voltage-switching are realized in the whole operating range at the light load. The light-load efficiency is 81% to 87%, which improves by 5% to 10% in comparison to the traditional forward converter. The prototype also functions well under the load transient. The proposed control scheme is implemented in one digital controller without additional components, and the circuit is low loss and low cost.

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“…This methodology is implemented only on 50 Hz sinusoidal signal but arguing that this can be applicable up to 60 Hz signal. ZCP detection in inductor current for high current swithed mode DC-DC converters is presented in [11]. In this paper voltage polarity detector based on the transistor memory cell and auto zero-comparator is used for ZCP detection.…”

Section: Introductionmentioning

confidence: 99%

Non-Zero Crossing Point Detection in a Distorted Sinusoidal Signal Using Logistic Regression Model

Veeramsetty¹,

Srinivasula²,

Salkuti

2022

Computers

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Non-Zero crossing point detection in a sinusoidal signal is essential in case of various power system and power electronics applications like power system protection and power converters controller design. In this paper 96 data sets are created from a distorted sinusoidal signal based on MATLAB simulation. Distorted sinusoidal signals are generated in MATLAB with various noise and harmonic levels. In this paper, logistic regression model is used to predict the non-zero crossing point in a distorted signal based on input features like slope, intercept, correlation and RMSE. Logistic regression model is trained and tested in Google Colab environment. As per simulation results, it is observed that logistic regression model is able to predict all non-zero-crossing point in a distorted signal.

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Inductor Current Zero-Crossing Detector and CCM/DCM Boundary Detector for Integrated High-Current Switched-Mode DC–DC Converters

Cited by 38 publications

References 10 publications

A wide input voltage range DC-DC Buck converter with dynamically modified ZCD circuit

A wide input voltage range DC-DC Buck converter with dynamically modified ZCD circuit

New Fixed-Frequency Digital Control to Improve the Light-Load Efficiency of an Isolated Regulated Converter

Non-Zero Crossing Point Detection in a Distorted Sinusoidal Signal Using Logistic Regression Model

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