Patent ID: 7880453

Claim:
A switching controller of an interleaved switching converter comprising a first converter and a second converter coupled in parallel, the first converter using a first switch operated by a first control signal and the second converter using a second switch operated by a second control signal, the switching controller comprising: a third switch coupled between a first voltage source and a node, configured to turn on in response to a first pulse signal corresponding to the first control signal; a capacitor coupled to the node; an amplifier configured to output a current corresponding to a difference between a reference voltage and a voltage corresponding to a voltage of the capacitor; a comparator configured to compare an output voltage corresponding to the current output from the amplifier with the voltage of the capacitor, and to output a second pulse signal according to the comparison; and a fourth switch coupled between the node and a second voltage source, configured to turn on in response to a third pulse signal, the third pulse signal being generated by the second pulse signal and determining a leading edge of the second control signal.