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Sequential low-voltage detecting method for multistring LED BLU circuit

Sequential low-voltage detecting method for multistring LED BLU circuit

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A new low-voltage detecting method for a multichannel LED back lighting unit is proposed. The proposed method detects the lowest voltage drops among the multichannel LED strings with a reduced number of devices, and it provides feedback voltage to control the stages of the boost converter for minimising the power consumption in the LED driving circuit.

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