vdavi81
Newbie level 4
Hi,
I have to design a digital pwm controller of the buck converter. The first step of my work is obviusly to simulate a buck converter with my calculated L and C value. These value like you know, depend on the current drawn by the load, frequency, duty cicle and output distorsion. Well..... I have a problem to simulate on the eldo simulator a variable current load. My circuit must be able to erogate a current from 200 uA to 25 mA.
For the simulations I use cadence icfb with eldo simulator.
1)How I Can simulate a variable load?
2)I've thought to use a Resistor connected in parallel with filter capacitor of the buck converter. Th value of resistor must be variable during the simulation for example using a value pwl or pulse....How can I do it?
3) I heard about the possibility to use current source for example using a pwl variation or pulse variation... How can I do it?
Anyone know how to vary the output voltage as a function of load variations? I still do not understand why if the load current (and then the load resitence) varies, then varies the output voltage too?
Anyone can recommend to me some book or article about output variation inthe switching converter, buck converter.
Thank you very mutch!!!!
P.S. Excuse me for my orrible english, but I'm Italian and I've not praticated English language emoght.
I have to design a digital pwm controller of the buck converter. The first step of my work is obviusly to simulate a buck converter with my calculated L and C value. These value like you know, depend on the current drawn by the load, frequency, duty cicle and output distorsion. Well..... I have a problem to simulate on the eldo simulator a variable current load. My circuit must be able to erogate a current from 200 uA to 25 mA.
For the simulations I use cadence icfb with eldo simulator.
1)How I Can simulate a variable load?
2)I've thought to use a Resistor connected in parallel with filter capacitor of the buck converter. Th value of resistor must be variable during the simulation for example using a value pwl or pulse....How can I do it?
3) I heard about the possibility to use current source for example using a pwl variation or pulse variation... How can I do it?
Anyone know how to vary the output voltage as a function of load variations? I still do not understand why if the load current (and then the load resitence) varies, then varies the output voltage too?
Anyone can recommend to me some book or article about output variation inthe switching converter, buck converter.
Thank you very mutch!!!!
P.S. Excuse me for my orrible english, but I'm Italian and I've not praticated English language emoght.
