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Adaptive leading-edge blanking circuit and method for switching mode power converter
Adaptive leading-edge blanking circuit and method for switching mode power converter
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机译:用于开关模式功率转换器的自适应前沿消隐电路和方法
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摘要
In an adaptive leading-edge blanking circuit and method for a switching mode power converter, an inductor current of the converter is sensed and compared with a threshold to decide an end point of a leading-edge blanking time. Circuit and method are further provided for preventing the converter from entering pulse skipping mode, which employs a current trimming circuit in an oscillator for a PWM controller in the converter to reduce a charging current in the oscillator if the output voltage of the converter is excessively high, to thereby reduce the oscillator frequency and in turn lower the switching frequency of a high-side power switch of the converter.
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