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Electromagnetic interference (EMI) for pulse frequency modulation (PFM) mode of a switching regulator
Electromagnetic interference (EMI) for pulse frequency modulation (PFM) mode of a switching regulator
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机译:开关调节器的脉冲频率调制(PFM)模式的电磁干扰(EMI)
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摘要
A circuit and method providing switching regulation configured to provide a pulse frequency modulation (PFM) mode of operation with reduced electromagnetic interference (EMI) comprising an output stage configured to provide switching comprising a first and second transistor, a sense circuit configured to provide output current information sensing from an output stage and a current limit reference, a first digital-to-analog converter (DAC) configured to provide signal to the current limit reference, an adder function configured to provide a signal to the first digital-to-analog converter (DAC), and a linear shift feedback register (LSFR) configured to provide a signal to an adder function followed by the first digital-to-analog converter (DAC), and the LSFR receives a clock signal from said output stage.
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