Patent ID: 8125800
Filing Date: 2012-02-28
Classification: H02M

Abstract:
1. An isolated switching regulator comprising: a input side circuit coupled to an input side of a first isolating device, the input side circuit generating a switched voltage across the first isolation device; an output side circuit coupled to an output side of the isolating device, the output side circuit generating control signals to control the input side circuit to generate a regulated output voltage; a second isolating device coupled between the output side circuit and the input side circuit for conveying the control signals generated by the output side circuit to the input side circuit, wherein the output side circuit comprises a closed-loop soft-start circuit, and wherein the closed-loop soft-start circuit comprises: an error amplifier having a first input coupled to a lower of a reference voltage and a one-time ramp voltage and having a second input coupled to a voltage representative of the regulated output voltage, the soft-start circuit regulating the output voltage to the ramp voltage until it exceeds the reference voltage.