Patent ID: 8089782
Filing Date: 2012-01-03
Classification: H02M

Abstract:
1. A High accuracy average output current control scheme for power current converter in critical DCM comprising: a reference block generating a preset reference signal; a reference calculation block based on the power current converter's power topology, the correspondent algorithm is calculated to convert the input reference from the reference block into correspondent reference control signal output; a state detecting block is to detect the turn-on inductor current of a switching power current converter and converting the current into the same signal format as the reference control signal from the reference calculation block; an error detector is used to detect the error between the outputs from the reference calculation block and the state detected block and to trigger power driver block to turn off the power switch in the power current converter as the error is cross over zero; a zero state detector is used to detect when the inductor current of the power current converter is cross over zero and trigger power driver block to turn on the power switch in the power current converter; a power driver block is controlled with both the error detector and the zero state detector to drive the power switch in the power current converter; Based on the correspondent algorithm, the output of power driver block is used for synchronizing calculation.