| 摘要 |
A power supply controller is disclosed. An example power supply controller includes a signal separator circuit coupled to generate a feedback signal in response to a sense signal representative of an output of a power supply. An error signal generator is coupled to generate an error signal in response to the feedback signal and a reference signal. A control circuit is coupled to generate a drive signal in response to the error signal. The drive signal is coupled to control switching of a switch of the power supply. A multi-cycle modulation circuit is included in the control circuit and is coupled to generate a skip signal in response to a start skip signal, a stop skip signal and a skip mask signal. The skip mask signal is generated in response to the skip signal. The start skip and stop skip signals are coupled to cause the drive signal to start skipping or stop skipping, respectively, on-time intervals of cycles. The skip mask signal is coupled to disable the start skip signal from causing the drive signal to start skipping the on-time intervals of cycles. |
