Multiphase Voltage Converter PWM for Overshoot-Limited Transients

The patent stores pending PWM pulses in advance before they are needed. When a transient condition occurs, these pre-stored pulses are immediately provided to the power stages, eliminating the response delay that would otherwise cause voltage instability. This preliminary preparation of control signals resolves the contradiction by enabling fast response without requiring continuous PWM generation during transients.

The patent dynamically adjusts the PWM pulse generation based on detected transient conditions. The controller monitors for transient events and selectively provides stored PWM pulses only when transients are detected, rather than continuously. This dynamic adaptation allows the system to maintain voltage stability during transients while avoiding overshoot and undershoot that would occur with continuous PWM provision.

The patent pre-stores multiple PWM pulses at different frequency levels before a transient occurs. When a transient is detected, the controller immediately provides these pre-prepared high-frequency pulses without needing to generate them in real-time. This eliminates the delay associated with increasing frequency dynamically, achieving fast transient response while controlling the number of pulses to prevent overshoot.

The patent provides a predetermined number of high-frequency PWM pulses during transient conditions, which may be more than the minimum needed but less than continuous high-frequency operation. This partial action approach ensures sufficient transient response speed while limiting the total energy delivery to prevent voltage overshoot, resolving the contradiction between response speed and overshoot prevention.