SWITCHED DC/DC BOOST POWER STAGE WITH LINEAR CONTROL-TO-OUTPUT CONVERSION RATIO, BASED ON THE RAMP-MODULATED PWM GENERATOR

摘要

It is proposed a ramp-modulated pulse width modulation generator (100) comprising: an output stage (1 10) generating a ramp-modulated voltage (VD); a control input (130) providing a variable multi-slope ramp voltage (Vc); a reference input (120) providing a constant voltage (Vb); a comparator (140) connected to the control input and the reference input, the comparator comparing the voltage Vc of the control input with the voltage Vb of the reference input to determine a duty-cycle ration of the ramp-modulated voltage VD generated as a result of the comparison