Power Supply Control Circuit for Stable CC/CV Mode Switching

The patent applies preliminary action by preparing the control circuit in advance for safe shutdown. Before turning off the power supply, the control circuit pre-adjusts the operation amount through filtering and gradual reduction, preventing current undershoot from occurring in the first place. This is achieved by continuously filtering the operation amount even during shutdown sequences, ensuring smooth transition to zero current without sudden negative spikes.

The patent implements feedback control by continuously monitoring the operation amount and using filtered feedback signals to adjust the control output. During power-off sequences, the feedback mechanism ensures that the control circuit responds to changing conditions in real-time, maintaining stability by adjusting the operation amount based on actual system state rather than abrupt command changes.

The patent uses feedback control to maintain stability during mode transitions. By continuously monitoring the operation amount and applying filtering to the feedback signal, the control circuit smoothly adapts when switching between CC and CV modes, preventing instability that would otherwise occur during the transition period.

The patent applies preliminary action by pre-filtering and preparing the operation amount before mode switching occurs. This ensures that when transitions between control modes are initiated, the control circuit is already in a stable state, preventing oscillations or instability during the switching event.