Driver Deadtime Control and Its Impact on System Stability of Synchronous Buck Voltage Regulator

Nonlinear Effect of Dead Time in Small-Signal Modeling of Power-Electronic System Under Low-Load Conditions

“…Therefore, the slope of N(A) 1 is −k. (10) zero. The proposed model estimates the nonlinear error sufficiently well.…”

“…The dead-time effect regarding the small-signal dynamics has gained some attention in the literature. Several studies have modeled the dead-time effect with a resistor-like element [6]- [10]. Three-phase converters were analyzed in [6] and [7], and single-phase converters in [8] and [9].…”

“…Three-phase converters were analyzed in [6] and [7], and single-phase converters in [8] and [9]. In [10], the dead-time effect on the dynamics of a synchronous switching buck converter was analyzed, focusing on the charging of the drain-source capacitance during the dead time. The dead-time effect on the dynamics of a quasi-square-wave flyback converter was analyzed in [11].…”

Control of a Multiphase Buck Converter, Based on Sliding Mode and Disturbance Estimation, Capable of Linear Large Signal Operation

“…In a real system there are some parameter uncertainties in the forms of inductor ohmic resistance deviation ∆R L inductance drops and tolerances ∆L, and capacitance deviation ∆C o . A real effective duty ratio is different from the ideal because of the dead times [3] and rise times of MOSFETs. There are some unknown disturbances in the form of sensor offsets and noise.…”

“…Power converters can also exhibit unstable behavior in such cases. Nonlinearities in the forms of converter nonlinear characteristic, parameter nonlinear dependence (for example, inductance is dependent on current), control signal saturation, and dead time, effects in the transistor legs [3], impact the dynamical response and stability, so they can be significantly different than in the designed nominal case.. A controller for BE should compensate for these nonlinearities, so that the dynamical characteristic is operating point independent; if it is linear, the control design for battery model tracking can be simpler. The motor controller acts as a Constant Power Load (CPL), which is described as negative incremental resistance in the literature [4].…”