| CPC H05B 45/375 (2020.01) [H05B 45/14 (2020.01); H05B 45/44 (2020.01)] | 19 Claims |
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1. A switching controller, comprising:
a buck controller having an input for receiving a variable voltage, an output for providing a buck voltage by switching said variable voltage into an output filter according to a switching signal having a variable duty cycle to regulate a current into a load; and
a bypass circuit coupled to said buck controller for comparing said variable duty cycle of said switching signal to a threshold, for activating a bypass signal in response to said variable duty cycle exceeding said threshold, and for subsequently de-activating said bypass signal according to a predetermined algorithm, wherein said bypass circuit comprises:
a duty cycle comparison circuit coupled to said buck controller for providing a duty_over_max signal in response to determining that said variable duty cycle is greater than said threshold; and
a bypass management circuit for activating said bypass signal in response to said duty_over_max signal, and de-activating said bypass signal according to said predetermined algorithm.
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