Abstract

Applications such as high power light emitting diode (LED) and laser diode need a high output current source power supply. Low power dissipation and fast response are essential requirements for these solutions. Usually, accurate and fast direct output current sensing adds cost and power loss to the supply. This paper proposes a novel indirect load current signal extraction method for current source power supply. By doing so, the load current dynamic tracking performance is not compromised while the converter has improved efficiency and thermal performance.

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