Understanding Optocoupler Chip for Buck Converter Circuit

[onceinalifetim]

hi... i need some understanding of optocoupler chip after doing so much of research.
currently am doing buck converter circuit to observe the switching performance of IGBT..
i test my circuit with (PWM chip > High Side driver > power circuit). when i power on the whole circuit.. i can't measure anything at my buck converter output, and my high side driver is sorted..

for i understand the about the optocoupler chip, is to isolation the voltage.. so i assume the i should place the optocoupler chip between my high side driver and power circuit and is a must to my question is:

• where do i place my optocoupler?? between the power circuit and High side driver or PWM chip and High side driver?

• for the optocoupler chip, it is can transfer the signal from low signal to high signal?

Hope to hear from you soon!1

 

[berkeman]

hi... i need some understanding of optocoupler chip after doing so much of research.
currently am doing buck converter circuit to observe the switching performance of IGBT..
i test my circuit with (PWM chip > High Side driver > power circuit). when i power on the whole circuit.. i can't measure anything at my buck converter output, and my high side driver is sorted..

for i understand the about the optocoupler chip, is to isolation the voltage.. so i assume the i should place the optocoupler chip between my high side driver and power circuit and is a must tomy question is:

• where do i place my optocoupler?? between the power circuit and High side driver or PWM chip and High side driver?

• for the optocoupler chip, it is can transfer the signal from low signal to high signal?

Hope to hear from you soon!1

The buck topology DC-DC converter is a non-isolated converter. It uses just an inductor and not a transformer, so there is no need or place for an optocoupler. Can you show us the schematic of what you are trying to do?