| 摘要 |
The invention relates to a method for regulating a step-up/step-down converter, wherein a first switch element (SBUCK) is activated as a component of the step-down converter by means of a first pulse-width modulated switch signal (PWM 1 OUT), and wherein a second switch element (SBOOST) is activated as a component of the step-up converter by means of a second pulse-width modulated switch signal (PWM 2 OUT) such that an input voltage (UIN) is converted into an output voltage (UOUT), wherein the curves of the input voltage (UIN) and of the output voltage (UOUT) continuously approximate or overlap each other. For this purpose, a synchronous third pulse-width modulated switch signal (PWM 3 OUT) is superimposed on the second pulse-width modulated switch signal (PWM 2 OUT) upon approximation of the output voltage (UOUT) to the greater input voltage (UIN), having an increasing duty cycle in such a manner that the second switch element (SBOOST) already begins to clock when the first switch element (SBUCK) still clocks, and the second pulse-width modulated switch signal (PWM 2 OUT) still has a duty cycle equal to zero. |
