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This paper introduces a newly improved MOSFET, ultra-FRFET of which Trr characteristic is much faster than that of the typical MOSFET and presents its effectiveness when it is applied to HV-BLU system of LCD TVs. The reverse recovery time, Trr of ultra-FRFET is shorter than 40 nsec and the peak value of reverse recovery current, irr is also much smaller compared to the typical MOSFET's, which are...
This paper proposes a new lowest-voltage detecting circuit for multi-channel LED backlighting units (BLUs) for LCD TVs. The proposed circuit detects the lowest voltage drop among the multi-channel LED strings with reduced number of devices. After detecting such condition the circuit provides a feedback voltage to control the output voltage of the boost converter. Therefore, it can minimize the power...
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