Soft-start circuit with duty ratio controlled voltage clamping and adaptive sizing technique for integrated DC-DC converters

Jing, Xiaocheng; Mok, Philip K. T.

doi:10.1109/edssc.2010.5713776

Cited by 10 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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].…”

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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…Such capacitor, due to their substantial dimension, cannot be integrated into the same chip of a voltage regulator. This is obviously disadvantageous, since the presence of the relevant pin and of the soft-start capacitor involves a significant bulk and increase in cost [3][4][5][6]. In addition, this circuit can only work in the started period.…”

Section: Traditional Soft-start Circuitmentioning

confidence: 99%

A soft start circuit for automobile voltage regulator

Huang

Wang

et al. 2011

2011 International Conference on Electronics, Communications and Control (ICECC)

View full text Add to dashboard Cite

A soft-start circuit for automobile voltage regulator is presented in this paper. By using a DAC control and frequency detection technology, this circuit can provide a 17% preexcitation duty ratio to start the automobile voltage regulator. When the alternator achieves the cut-in rotational speed, the soft start circuit increases the duty ratio of the driving pulse for the switching transistor from 17% to 100% gradually, which makes the magnetizing current of the alternator to increase gradually accordingly and suppress the burst of the mechanical torque, avoid engine stalling due to an instantaneous overload. Also it has Soft loading function. Based on the CSMC 0.5um 40V double poly BCD process, the soft start circuit is implemented on chip, the electrical characteristics of the design is verified in Spectre simulator in the Cadence environment. The time needed for the transition of the duty ratio from 17% to 100% is 4 seconds.

show abstract

“…The gate modulation technique was previously reported to dynamically scale the gate voltage swing with the load for reducing the gate-drive loss [1,2,3]. Scaling the size of power transistors with the load was applied to lower both the converter's gate-drive loss and switching loss [4,5,6,7]. However, if the gate drive of the segmented transistor is not properly designed, there may be significant power loss of cross conductive short circuit in reference [4].…”

Section: Introductionmentioning

confidence: 99%

Light-load efficiency improving boost converter with the hybrid modulation of hysteresis current mode and burst mode

Miao

Chai

Liu

et al. 2019

IEICE Electron. Express

View full text Add to dashboard Cite

This paper proposes a new method to improve the efficiency of boost converter under light load conditions by using the hybrid modulation of hysteresis current mode and burst mode (HCM-BM). A circuit is designed to satisfy the requirement of adaptive fast switching between HCM and BM. The whole circuit of proposed HCM-BM converter and conventional HCM converter have been built with a standard 0.18-µm CMOS process, respectively. The simulation results show that the proposed converter provides a maximum efficiency improvement of 17% under light load compared with the conventional boost converter. Meantime, it can achieve up to 74% efficiency at 10 µA load.

show abstract

Soft-start circuit with duty ratio controlled voltage clamping and adaptive sizing technique for integrated DC-DC converters

Cited by 10 publications

References 5 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

A soft start circuit for automobile voltage regulator

Light-load efficiency improving boost converter with the hybrid modulation of hysteresis current mode and burst mode

Contact Info

Product

Resources

About