A self-clocked binary-seaching digital low-dropout regulator with fast transient response

Shi, Jiangyi; Zhao, Bo; Tang, Zhengguang; Ma, Peijun; Di, Zengru

doi:10.1587/elex.17.20200297

Cited by 4 publications

(3 citation statements)

References 31 publications

(34 reference statements)

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“…Model Predictive Control (MPC) is a widely used control algorithm that controls the behavior of a system by calculating a sequence of control actions at each sampling moment [24]. The main idea of MPC is to predict the future system behavior in a limited forecast period according to the dynamic model of the system [25], and optimize the control action sequence in the predicted period, so that the system can achieve the desired control effect under certain performance indicators [26]. Compared to traditional PI control, MPC can be used to handle multiple variables and constraints and adapt to the nonlinear and time-varying nature of the system [27].…”

Section: Introductionmentioning

confidence: 99%

Model predictive control strategy based on Kalman filter for dual active bridge converter

Yan,

Hua,

Xun

et al. 2024

IEICE Electron. Express

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With the widespread use of electric vehicles, the large disturbance caused by the uncertainty of the AC side of the power grid will adversely affect the voltage stability of the DC side of the charging pile, which will threaten the charging safety of electric vehicles. In order to achieve fast and adaptive DC voltage regulation under large disturbance, this paper proposes a dual active bridge (DAB) converter control strategy based on Kalman Filter (KF) and Model Predictive Control (MPC). The improved Euler method is used to obtain a more accurate DAB discrete model, and the MPC control system is designed to improve the control accuracy. The best observation results of KF are used as feedforward compensation to improve the accuracy of output voltage regulation and ensure the stability of electric vehicles in the face of various disturbance problems. Finally, the effectiveness of the control strategy is verified by experiment.

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Section: Introductionmentioning

confidence: 99%

Model predictive control strategy based on Kalman filter for dual active bridge converter

Yan,

Hua,

Xun

et al. 2024

IEICE Electron. Express

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show abstract

“…Another strategy involves modifying the structure of the power PMOS transistor array, for instance, a binary-weighted PMOS capacitor array. Because the most significant bit PMOS transistor always offers the maximum current whether large or small jumps occur in the output voltage, this leads to the oscillation phenomenon and a long recovery time when a small output voltage change occurs [8]. Dual-loop regulation is an effective way to avoid the oscillation phenomenon by utilizing an extra transient detector (TD) to check the output changes.…”

Section: Introductionmentioning

confidence: 99%

A Double-Edge-Triggered Digital LDO with Built-In Adaptive VCO Clock for Fast Transient Response and Low Power Consumption

Xin,

Wei,

Tong

2023

Electronics

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A double-edge-triggered digital low dropout regulator (DLDO) is proposed with a built-in adaptive voltage-controlled oscillator (VCO) clock (AVC) for a system-on-chip (SoC) application. To achieve a fast transient response, the main comparator generates the comparison result at the rising edge of the AVC, and this result is sampled by the coarse or fine bidirectional shifter register at the falling edge of the AVC. Furthermore, the clock frequency can be boosted from 8 MHz at the steady state to 50 MHz by the AVC when the output current suffers from a sudden change, and it can also be adjusted in real-time according to the output voltage, which avoids the oscillation phenomenon and decreases the power consumption during the recovery process. To further lower the power consumption, the self-clock comparator replaces the conventional static comparator in the transient detector. The post-simulation results show that the proposed DLDO consumes a quiescent current of 95.13 μA in the steady state, and drives a maximum load current of 25 mA at the supply power of 0.6 V with an active area of 0.053-mm2 in a 180 nm CMOS process. When the load current jumps from 0.5 mA to 25 mA at the edge of 100 ps, the undershoot voltage and overshoot voltage are only 335 mV with the recovery time of 2.7 μs and 47.6 mV with the recovery time of 2.1 μs at the total on-chip capacitor of 50 pF, respectively, resulting in two competitive figures of merits (FoMs) than the previous works.

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“…The efficiency of DC-DC converters can reach more than 90% [1,2,3,4,5,6,7,8,9]. However, its large output ripple limits its applications in sensitive electronic load where additional LDO is required to achieve low power noise and ripple [10,11,12,13,14,15,16,17,18,19]. Hybrid methods of switched-mode, switched-capacitor-mode DC-DC, low dropout voltage regulator (LDO) are proposed in recent years [20,21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

A novel DC-DC converter and LDO cascaded circuit with improved dynamic response and loop stability

Zhou

Min

Luo

2021

IEICE Electron. Express

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Presented is a new type of DC-DC converter and low dropout voltage regulator (LDO) cascaded circuit, which has improved dynamic response and loop stability. In this novel cascaded circuit, the gate voltage of the pass element of the LDO is quantized and compared with a target value to form an error value to finally control the feedback coefficient of the DC-DC converter. Meanwhile, the adjusting speed of this feedback coefficient can be changed dynamically through the gain compensator, which is minimized to obtain the best loop stability when approaching the steady-state and increased to achieve a fast transient response during large dynamic change. The testing results of the prototype designed to verify the feasibility show that the novel cascaded circuit can increase the response speed by 22 times and optimize the voltage ripple by 1.9 times.

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A self-clocked binary-seaching digital low-dropout regulator with fast transient response

Cited by 4 publications

References 31 publications

Model predictive control strategy based on Kalman filter for dual active bridge converter

Model predictive control strategy based on Kalman filter for dual active bridge converter

A Double-Edge-Triggered Digital LDO with Built-In Adaptive VCO Clock for Fast Transient Response and Low Power Consumption

A novel DC-DC converter and LDO cascaded circuit with improved dynamic response and loop stability

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