Search Results - "Kang, Bongkoo"

Active Balancing of Li-Ion Battery Cells Using Transformer as Energy Carrier by Lee, Kyung-Min, Lee, Sang-Won, Choi, Yoon-Geol, Kang, Bongkoo

“…A circuit for balancing Li-ion battery cells is proposed. This circuit requires one small transformer and N + 3 bilateral switches to equalize the charging…”
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Modularized Design of Active Charge Equalizer for Li-Ion Battery Pack by Lee, Sang-Won, Lee, Kyung-Min, Choi, Yoon-Geol, Kang, Bongkoo

“…A modularized design of an active charge equalizer and a charge equalization algorithm for a Li-ion battery pack are proposed in this paper. The equalizer…”
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Active Cell Balancing of Li-Ion Batteries Using LC Series Resonant Circuit by Lee, Kyung-Min, Chung, Yoo-Chae, Sung, Chang-Hyeon, Kang, Bongkoo

“…This paper proposes a new active cellbalancing method for Li-ion batteries. It uses an LC series resonant circuit as an energy carrier, which transfers the…”
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Quasi-Resonant Passive Snubber for Improving Power Conversion Efficiency of a DC–DC Step-Down Converter by Lee, Sang-Hoon, Choe, Hyung-Jin, Kang, Bongkoo

“…A quasi-resonant passive snubber for the conventional dc-dc step-down converter is proposed. The snubber uses six passive components to achieve a zero-current…”
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Improvement of Power-Conversion Efficiency of a DC-DC Boost Converter Using a Passive Snubber Circuit by Yun, Jae-Jung, Choe, Hyung-Jin, Hwang, Young-Ho, Park, Yong-Kyu, Kang, Bongkoo

“…This paper proposes a method of improving the power-conversion efficiency of a direct-current-direct-current boost converter. The proposed method uses a…”
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High-Efficiency Asymmetric Forward-Flyback Converter for Wide Output Power Range by Lee, Hyeon-Seok, Choe, Hyung-Jin, Ham, Seok-Hyeong, Kang, Bongkoo

“…This paper proposes an asymmetric forward-flyback dc-dc converter that has high power-conversion efficiency η e over a wide output power range. To solve the…”
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Active Charge Equalizer of Li-Ion Battery Cells Using Double Energy Carriers by Lee, Sang-Won, Choi, Yoon-Geol, Kang, Bongkoo

“…In this work, a new active balancing circuit is proposed. This circuit consists of a cell-access network and an energy-transfer network. The cell-access…”
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Method to estimate profile of threshold voltage degradation in MOSFETs due to electrical stress by Yun, Yeohyeok, Seo, Ji-Hoon, Son, Donghee, Kang, Bongkoo

“…This paper presents a method to measure the threshold voltage degradation ΔVth along the channel direction due to electrical stress in MOSFETs. This method…”
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Effect of oxide-trapped charge on the anomalous drain avalanche hot carrier degradation of a SiO2 dielectric nMOSFET by Yun, Yeohyeok, Seo, Ji-Hoon, Kwon, Young-Kyu, Kang, Bongkoo

“…This paper presents an investigation of the effect of oxide-trapped charge on the anomalous drain avalanche hot carrier degradation of SiO2 dielectric nMOSFET…”
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Effects of film thickness and Sn concentration on electrical properties of solution-processed zinc tin oxide thin film transistors by Kim, CheolGyu, Lee, Nam-Hyun, Kwon, Young-Kyu, Kang, Bongkoo

“…This paper investigates the effect of Sn concentration and film thickness on properties of zinc tin oxide (ZTO) thin film transistors (TFTs) fabricated using a…”
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Linear frequency modulation of voltage-controlled oscillator using delay-line feedback by KWON, Hyukjin, KANG, Bongkoo

“…This letter proposes a structure for a voltage-controlled oscillator (VCO) circuit which operates in a frequency range of 4.0-4.3 GHz and can achieve a highly…”
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Design of 6-18 GHz Wideband Phase Shifters Using Radial Stubs by KWON, Hyukjin, LIM, Hongwook, KANG, Bongkoo

“…A 6-18 GHz wideband phase shifter is proposed. This phase shifter consists of one Lange coupler, four radial stubs, and four switching diodes and bias…”
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Low-Cost Drive Circuit for AC-Direct LED Lamps by Chung, Yoo-Chae, Lee, Kyung-Min, Choe, Hyung-Jin, Sung, Chang-Hyeon, Kang, Bongkoo

“…This paper proposes a drive circuit for ac-direct LED lamps. The proposed circuit consists only of a line filter, an LED bridge, a load inductor, a…”
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Voltage dependent degradation of HfSiON/SiO2 nMOSFETs under positive bias temperature instability by Kim, Cheolgyu, Kim, Hyeokjin, Kang, Bongkoo

“…[Display omitted] •PBTI stress generated shallow traps in HfSiON dielectric.•The exponent of power-law for ΔVth increased exponentially with stress…”
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Impact of Off-State Stress and Negative Bias Temperature Instability on Degradation of Nanoscale pMOSFET by LEE, Nam-Hyun, KIM, Hyungwook, KANG, Bongkoo

“…This letter investigates the impact of dynamic stress on the degradation of a nanoscale p-channel metal-oxide-semiconductor field-effect transistor (pMOSFET)…”
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High-efficiency Bidirectional Buck–Boost Converter for Residential Energy Storage System by Ham, Seok-Hyeong, Choi, Yoon-Geol, Lee, Hyeon-Seok, Lee, Sang-Won, Lee, Su-Chang, Kang, Bongkoo

“…This paper proposes a bidirectional dc–dc converter for residential micro-grid applications. The proposed converter can operate over an input voltage range…”
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Circuit Structure and Control Method to Reduce Size and Harmonic Distortion of Interleaved Dual Buck Inverter by Cho, Min-Gi, Lee, Sang-Hoon, Lee, Hyeon-Seok, Choi, Yoon-Geol, Kang, Bongkoo

“…A new circuit structure and control method for a high power interleaved dual-buck inverter are proposed. The proposed inverter consists of six switches, four…”
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Effect of off-State Stress and Drain Relaxation Voltage on Degradation of a Nanoscale nMOSFET at High Temperature by LEE, Nam-Hyun, BAEK, Dohyun, KANG, Bongkoo

“…This paper investigates the degradation mechanism of a nanoscale n-channel metal-oxide-semiconductor field-effect transistor (nMOSFET) that is subjected to…”
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Compact Single-Stage Micro-Inverter with Advanced Control Schemes for Photovoltaic Systems by Choi, Yoon-Geol, Lee, Hyeon-Seok, Kang, Bongkoo, Lee, Su-Chang, Yoon, Sang-Jin

“…This paper proposes a grid-connected single-stage micro-inverter with low cost, small size, and high efficiency to drive a 320 W class photovoltaic panel. This…”
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Method to predict length dependency of negative bias temperature instability degradation in p-MOSFETs by Seo, Ji-Hoon, Kim, Gang-Jun, Son, Donghee, Lee, Nam-Hyun, Kang, Yongha, Kang, Bongkoo

“…We propose a method to predict the length dependency of the magnitude of degradation caused by negative bias temperature instability (NBTI) stress applied to a…”
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