Abstract: A constant-on-time power-supply controller includes an adder and a control circuit. The adder generates a sum of a sense voltage and a regulated output voltage generated by a filter inductor. The sense voltage is generated by a sense circuit that sources a current to the filter inductor while the inductor is uncoupled from an input voltage, and the sense voltage is related to the current. The control circuit couples the filter inductor to the input voltage for a predetermined time in response to the sum having a predetermined relationship to a reference voltage. Such a power-supply controller may yield a relatively tight regulation of the output voltage even with a power supply having with a low-ESR filter capacitor, and may do so with little or no additional compensation circuitry as compared to prior controllers and with no additional pin on the power-supply-controller chip.

Abstract: A switching capacitor network auxiliary voltage source for IC chip solution is provided. The solution can convert the high DC bus voltage into the low DC voltage in low cost and in high efficiency. The auxiliary voltage is independent of the power converter system duty-cycle.

Abstract: A quasi average current mode control scheme is provided. The control scheme allows only detecting one part of the inductor current of the switching converter to control the inductor current and make the average current of the inductor follow the reference current. The control scheme is noise insensitive and makes the whole controlled system cost effective.