Electricity: power supply or regulation systems – In shunt with source or load – Using diode
Reexamination Certificate
2011-01-25
2011-01-25
Riley, Shawn (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using diode
C323S283000
Reexamination Certificate
active
07876075
ABSTRACT:
A control circuit and control method for a power converter detects change of the output voltage of the converter, and performs the time-optimal control function when the change exceeds the default value. According to the voltage slew rate detected at the time of the change exceeding the default value, a time interval T1from the change exceeding the default value being detected to the current of the inductor rising to be the same as the output current of the converter is estimated, and the time intervals T2and T3are figured out based on the time interval T1. The parasitic resistance of the output capacitor of the converter is taken into account during estimating process such that even if the output capacitor has larger parasitic resistance, the output voltage can be back to the steady state value accurately to avoid the time-optimal control being triggered repeatedly.
REFERENCES:
patent: 6040688 (2000-03-01), Strubin
Chang Wei-Hsu
Chen Dan
Chiu Bo Yi
Richtek Technology Corporation
Riley Shawn
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