Switch Control Circuit for QR Buck Converter Current Error Compensation

The patent applies preliminary action by adjusting the gate on-time before the actual switching operation occurs. The controller pre-compensates for the known signal delay by extending the gate on-time duration, so that when the delayed signal finally reaches the gate terminal, the current control is already accurate. This resolves the contradiction by maintaining simple circuit operation while achieving precise current control through advance timing adjustment.

The patent implements feedback by continuously monitoring the inductor current and comparing it with the target current, then using this information to dynamically adjust the gate on-time. When input voltage changes cause current accuracy deterioration, the feedback mechanism detects the deviation and compensates by modifying the gate on-time in the next switching cycle. This resolves the contradiction by maintaining voltage adaptability while restoring current accuracy through closed-loop control.

The patent applies dynamics by making the gate on-time adjustable and adaptive rather than fixed. The controller dynamically modifies the gate on-time duration based on real-time conditions such as signal delay measurements and input voltage levels. This allows the system to optimize the balance between current control accuracy and switching frequency, extending gate on-time only when necessary for compensation while maintaining high switching frequency during normal operation. The dynamic adjustment resolves the contradiction by making the timing parameter flexible rather than static.