Patent ID: 9124171
Filing Date: 2015-09-01
Classification: H02M,H05B

Abstract:
1. An adaptive current limiter for use in a power conversion system having a dimmer circuit for turning off a cyclic signal during a portion of a phase thereof to form a phase-cut signal, comprising: a sense resistor including a first sense terminal coupled to a power supply terminal and a second sense terminal, the sense resistor to generate a sense voltage in response to a feedback current; a current pass transistor including a first terminal for receiving an input current, a second terminal coupled to the second sense terminal, and a control terminal; and a controller coupled to the sense resistor and to the control terminal, the controller for sensing a beginning of a turn-on phase of the phase-cut signal, and responsive to the sensing for limiting the feedback current conducted by the current pass transistor during the beginning of the turn-on phase of the phase-cut signal.