Patent ID: 8582319
Filing Date: 2013-11-12
Classification: H02M,Y02B

Abstract:
1. A resonant mode converter, comprising: a power factor correction (PFC) power converter having an input coupled to receive an input voltage; an LLC power converter cascaded with an output of the PFC power converter, the LLC power converter including a transformer coupled to generate an output of the resonant mode converter; a feedback circuit coupled to generate a first current representative of the output of the resonant mode converter; and a control unit including a current limiting circuit coupled to receive the first current and a second current generated in response to a reference voltage, the current limiting circuit coupled to limit the first current in response to the second current, the control unit further including an oscillator coupled to receive the first current, the oscillator coupled to generate a control signal having a control frequency in response to the first current, wherein the resonant mode converter output is controlled in response to the control frequency.