This paper researches a predictive modulation based on the output ripple voltage across of the ESR of the capacitor for the boost DC-DC converter. Firstly

this paper introduces the converter has two voltage feedback loops

which samples the ripple voltage across ESR of capacitor without sampling current. Secondly

in order to improve the digital control performance

the predictive technique is used. With that technique

the converter has faster transient response and perturbation is decreased. And at the same time

to avoid sub-harmonic oscillation

voltage valley trailing-edge modulation is adopted. Finally

boost DC-DC converter is controlled by above techniques and the simulation results made by Simulink show that it has good stability and transient response performance under perturbation. No current sensor or slope compensation needed in the implementation

and the cost of the converter is effectively reduced.