M
[email protected]
- Jan 1, 1970
- 0
hi all!
i m building a buck converter with peak current control...
so...from a sensing resistor that pass my output current and after a
small circuit i get a voltage that has the shape of the current
(triangle) and amplitude between 5 and 8 volt...
the next step is to add a compensation ramp to this voltage...i made
another circuit that produces this sawtooth wave and i have to add
it...
then the next step is to get an error amplifier and at the input to
put a reference for my output voltage (from a zener) and my output
voltage after a voltage divider...at the same level of 5 to 8 volts
....and the output of the error amplifier i have to take it to the one
input of a comparator, and to the other input of the comparator i have
to put the other voltage with the compensation ramp added...
this is how it should be done...but i dont know how...
i mean...i dont know how to setup the error amplifier and how i can
add the sawtooth to the voltage that is my "current image"...
if you could give me an example to simulate in spice it would be great!
i m building a buck converter with peak current control...
so...from a sensing resistor that pass my output current and after a
small circuit i get a voltage that has the shape of the current
(triangle) and amplitude between 5 and 8 volt...
the next step is to add a compensation ramp to this voltage...i made
another circuit that produces this sawtooth wave and i have to add
it...
then the next step is to get an error amplifier and at the input to
put a reference for my output voltage (from a zener) and my output
voltage after a voltage divider...at the same level of 5 to 8 volts
....and the output of the error amplifier i have to take it to the one
input of a comparator, and to the other input of the comparator i have
to put the other voltage with the compensation ramp added...
this is how it should be done...but i dont know how...
i mean...i dont know how to setup the error amplifier and how i can
add the sawtooth to the voltage that is my "current image"...
if you could give me an example to simulate in spice it would be great!