| 摘要 |
The invention is directed to a method for generating a pulse signal ( T ON ) driving power switches of a pulse-skipping modulated DC-to-DC converter. The method comprises:
- dividing (210) a switching clock period (T CLK ) of the DC-to-DC converter into k constant time intervals;
- generating (230) an internal clock signal having a frequency at least k-time higher than a frequency 1/T CLK of the switching clock;
- counting (232) a number CNT of pulses of the internal clock signal during one clock period of the switching clock period;
- generating an number m (220, 222) that counts a number of discrete equidistant voltage steps ”V of a voltage ramp V CAP before a reference voltage V Ref is reached by the voltage ramp V CAP , each voltage step ”V being defined by the relation = CNT ‹ m k , , T ON_WIN being the duration of the pulse signal (T ON ). |
