QubeZX
Newbie
Hi,
currently im making an IGBT protection for voltage inverters - by turning off PWM signal in right moment. Now im making PCB and because its my first big project I have some questions:
1. I want to use TLC3702 comparator, they say that it has build in push-pull.. so i dont need any other resistor for it to work (besides current regulations ofc)?
2. My input signal is sinusoidal 0 to 3.3V range. My power supply is 3.3V.
I've made hysteresis based on this link: https://www.maximintegrated.com/en/app-notes/index.mvp/id/3616 because TLC3702 has no built-in hysteresis.
Vref in my case is 2.8V ,Vthr is ~2.97 and Vthf is ~2.95. And this 2.965 is what i wanted to switch around (strange that Vref is not the voltage that comparator switches at - is that ok?)
3. Now i want to get on second comparator output logic true when my input is below value 0.55V. I know i should switch + and - of op-amp but what with hysteresis ? I should leave positive feedback i guess. Meaby i shouldnt worry at all and just do exacly the same only switch inputs ?
currently im making an IGBT protection for voltage inverters - by turning off PWM signal in right moment. Now im making PCB and because its my first big project I have some questions:
1. I want to use TLC3702 comparator, they say that it has build in push-pull.. so i dont need any other resistor for it to work (besides current regulations ofc)?
2. My input signal is sinusoidal 0 to 3.3V range. My power supply is 3.3V.
I've made hysteresis based on this link: https://www.maximintegrated.com/en/app-notes/index.mvp/id/3616 because TLC3702 has no built-in hysteresis.
Vref in my case is 2.8V ,Vthr is ~2.97 and Vthf is ~2.95. And this 2.965 is what i wanted to switch around (strange that Vref is not the voltage that comparator switches at - is that ok?)
3. Now i want to get on second comparator output logic true when my input is below value 0.55V. I know i should switch + and - of op-amp but what with hysteresis ? I should leave positive feedback i guess. Meaby i shouldnt worry at all and just do exacly the same only switch inputs ?