• KIEE International Transactions on Electrophysics and Applications
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• v.2C no.5
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• pp.253-257
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• 2002

A new Current-Controlled Driving Method that can drive AC PDPs with low voltage and high luminous efficiency for the sustaining period is presented. In this driving method, the voltage source is connected to a storage capacitor and the stored voltage is delivered to the panel through LC resonance. Thus, this driving method can drive the panel with a voltage source as low as about half of the voltage necessary in the conventional driving methods. The discharge current flowing into the AC PDP is limited in this method. Thus, the power consumption for the discharge is reduced and the discharge input power to output luminance efficiency is improved. Experimental results using this driving method showed that we could drive an AC PDP with a voltage source as low as 146V and that high luminous efficiency of 1.33 1m／W can be achieved.

• The Transactions of the Korean Institute of Power Electronics
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• v.10 no.4
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• pp.388-396
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• 2005

SRM has not been put into practical applications widely because of its large torque ripple, acoustic noise and low power factor. In addition, a traditional position sensor is needed for the drive control. So we propose an improved sensorless drive method of Switched Reluctance Motors using impressed voltage pulses. Conventional impressed voltage pulse method has a problem of phase delay because of low-pass filter. So in this paper we propose an unproved sensorless driving method based on the impressed voltage pulse using new pulse-shift circuit technique that overcomes the phase delay and start-up problem. Proposed method is implemented in a simple analog circuit instead of using an expensive DSP.

• Proceedings of the KIEE Conference
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• 1999.07f
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• pp.2594-2596
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• 1999

Recently, white good market has interest with inverter product, which has merit to on/off type with respect to energy saving and noise. But, inverter product's cost is rising, because of adding inverter circuit component. To reduce cost, inverter gate drive trend is using HVIC which needs only single voltage. Also using HVIC, designer can compact PCB'size. This paper shows application technique and key point of designing HVIC

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.22 no.7
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• pp.563-566
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• 2009

This paper presents a motor drive IC for automotive applications. The drive IC is dedicated to control and drive external MOSFETs which directly drive 3-phase motor with a high current. In case of driving high-side power switches, the bootstrap topology is widely used. however, it requires three bootstrap diode and three capacitor respectively. And it needs a minimum charging time to maintain high-side voltage. The motor drive IC uses a charge-pump circuit for all three high-side voltage with various protection schemes for automotive applications.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.04b
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• pp.41-42
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• 2009

This paper presents a motor drive IC for automotive applications. The drive IC is dedicated to control and drive external MOSFETs which directly drive 3-phase motor with a high current. In case of driving high-side power switches, the bootstrap topology is widely used. However, it requires three bootstrap diode and three capacitor respectively. And it needs a minimum charging time to maintain high-side voltage. The motor drive IC uses a charge-pump circuit for all three high-side voltage with various protection schemes for automotive applications.

• The Transactions of the Korean Institute of Electrical Engineers B
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• v.50 no.8
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• pp.408-415
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• 2001

Using power semiconductor switches such as IGBTs, diodes and L-C circuits, novel repetitive impulse voltage generator is developed. In the presented circuits, high voltage pulse is generated by series-connection of capacitors and IGBTs. Therefore, the high voltage pulse is obtained by circuit configuration without any high voltage pulse transformer and high voltage dc source. Especially, the proposed circuit can operate up to several kHz and have high reliability and longer life than conventional ones. In also gives voltage balance of IBGTs automatically. So, the difference of characteristics of IGBTs and drive signal does not cause severe problems. To verify the proposed circuit, 20kV and 300A pulse generator is manufactured and tested.

• Journal of the Korean Institute of Telematics and Electronics S
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• v.34S no.5
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• pp.94-103
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• 1997

It is necesary that analog buffer circuit should drive an external load in the VLSI design such as switched capacitor efilter (SCF), D/A converter, A/d converter, telecommunicatin circuit, etc. The conventional CMOS buffer circuit have many probvlems according as CMOS technique. Firstly, Capacity of large load ar enot able to opeate well. The problem can be solve to use class AB stages. But large load are operated a difficult, because an element of existing CMOS has a quadratic functional relation with inptu and outut voltage versus output current. Secondly, whole circuit of dynamic rang edecrease, because a range of inpt and output voltages go down according as increasing of intergration rate drop supply voltage. In this paper suggests that new differential CMOS line driver make out of operating an external of large load. In telecommunication's chip case transmission line could be a load. It is necessary that a load operate line driver. The proposal circuit is planned to hav ea high generation power rnage of voltage with preservin linearity. And circuit of capability is inspected through simulation program (HSPICE).

• Proceedings of the KIEE Conference
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• 1995.11a
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• pp.312-315
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• 1995

The base/gate drive suppression method proposed by Joshi and Bose is that which detects the output current polarity of the leg and, according to the polarity, suppresses the base/gate drive of one of the ore switching devices of the leg. This method has the merit that it does not have the conventional dead time problem, reduces the power loss of the driving circuit and others. But this method has difficulty in implementation. In this paper, a new base/gate drive suppression method by detecting not the output current polarity but the output voltage polarity is proposed. The proposed method is easier to implement than Joshi and Bose's method.

• Journal of Power Electronics
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• v.9 no.6
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• pp.884-891
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• 2009

An address voltage stabilization circuit for the single-side driving (SSD) method for AC plasma display panels (PDP) is proposed. The single-side driving method, which eliminates a common sustaining driver, uses only two electrodes in a three electrode AC PDP structure. The high-impedance (Hi-Z) mode operation of the data drive ICs during the sustaining period is needed for surface gas-discharge without misfiring in the SSD method but it produces the problem that the address voltage increases up to the breakdown voltage. The proposed circuit based on a flyback converter can stabilize the address voltage under the breakdown voltage and provide better surface gas-discharge performance without any misfiring in the SSD scheme.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.11
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• pp.2014-2019
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• 2006

PDP driving circuit requires switching devices and capacitors to stand up high voltages over 160V. This is the main cause that the power consumption and the cost of a PDP driving circuit increase. Conventional PDP driving circuits consist of 3 voltage sources and 16 switching devices. In this paper, we propose a PDP driving circuit using 2 voltage sources and 12 switching devices that can be operated with a lower supply voltage than conventional driving circuit. The operation of the proposed driving circuit is verified by the computer simulation. Simulation results show that the output signal can drive PDP cell when the supply voltage is higher than 45V in the input frequency range 70kHz to 100kHz.