This the our gate driver/mosfet stage at the moment, we've been playing with the resistor values on the delay loop to see if it makes a difference and haven't seen much. We've been building our full schematic but don't have access to it at the moment, we'll try and upload that when we have a chance in the new few days.
23b50707-5f4e-4928-9520-d9e481cafc49_zpsa1cc00de.jpg Photo by Jared_Ogden | Photobucket
23b50707-5f4e-4928-9520-d9e481cafc49_zpsa1cc00de.jpg Photo by Jared_Ogden | Photobucket
How are you splitting the phases for HIN and LIN ?
An externally hosted image should be here but it was not working when we last tested it.
Last edited:
We built our comparator using the LT1632 OP amp, then inverted its output by putting it back through the LT1632 with the other OP amp (inverting, unity gain). Thinking about it, its obvious that would cause a delay. Shown below is the output of the inverter and comparator stage, which we were using for our inputs of the gate driver. The inverted stage was again inverted to show the phase change. Good catch. Is there any way we could delay the non-inverted output of the comparator to match?
http://s1362.photobucket.com/user/Jared_Ogden/media/Delay_zps5c31172b.png.html
http://s1362.photobucket.com/user/Jared_Ogden/media/Delay_zps5c31172b.png.html
The issue that we realized we had is that the LT1632 won't operate as a voltage follow, which would have added the necessary delay without the inversion, which we need to keep as is. Other than using the LT1632, we don't have any op amps or XOR gates that operate with the same delay. Trying to think of a work around at the moment.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.