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Resonant Energy-Recovery Circuit With Asymmetric Voltage Excitation and No Circulating Current for Plasma Display Panel

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1 Author(s)
Sangshin Kwak ; Sch. of Electr. & Electron. Eng., Chung-ang Univ., Seoul, South Korea

A sustain driver with a resonant energy recovery circuit is proposed based on asymmetric voltage excitation for a complete resonant commutation of panel capacitor in plasma display panels (PDPs). The developed driver configures the sustain circuit and the resonant circuit in such a way that the resonant network is energized by higher voltage level and lower level than half sustain voltage in charging and discharging the panel capacitor, respectively. This proposed operation can guarantee perfect commutation of the panel capacitor voltage, zero-voltage switching of the sustain switches, and reduced electromagnetic interference due to no surge current. Furthermore, the developed sustain circuit is designed to eliminate the conduction losses and the current stresses on the circuit and the switching devices caused by the reverse recovery operation of the diodes. The energy trapped in the resonant inductors due to the inevitable diode reverse-recovery phenomena, which generates additional conduction losses and thermal problem with circulating currents, is recovered in the proposed circuit.

Published in:

Display Technology, Journal of  (Volume:8 ,  Issue: 10 )