VARIABLE CHARGE PUMP CIRCUIT WITH DYNAMIC LOAD

摘要

A kind of multiple selectable loads (322,326,330 of variable charge pump circuit (300) use; Figure. 5A-5B) to reduce the extraction water (334) of mains ripple by selecting load pre-selection pump voltage (further) appropriate. Charge pump circuit also compares pump voltage to reference voltage Vref) closing variable charge pump circuits, if the voltage of pump 10 is greater than reference voltage. Charge pump circuit also compares maximum voltage and is output to reference voltage to monitor whether that maximum ripple on-state voltage output is greater than reference voltage. Charge pump circuit includes one or more grades (306,310; 308,312), being operable to receive supply voltage VCC () generates one or more pump voltages, and multiple loads (322,326,330) are respectively with specific pump voltage job selector job selector dial tool (320,324,328) and rear pump and to the associated voltage for loading specific pump of multiple load selections.