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This is the only useful waveform you posted. The most concerning thing is that you get one wide gate pulse, then three extremely narrow pulses. I have personally seen this behavior before in current mode converters, and it is often due to overshoot on the current sense signal (often due to poor layout or large FET capacitance). This can be addressed by adding a filter to the current sense signal (see figure 5 of the LT3758 datasheet). There are other methods as well (increasing ripple current helps, and adding gate resistance may solve it too), but adding the filter is the easiest thing.Here is the Waveform of Drain and Gate With Load Connected. Now suggest me how to Stop Voltage drop once we connect the Load.
https://www.ti.com/lit/ds/symlink/lm5022.pdfHi all,
I need to design a circuit, with input voltage of 18V-36V(Nominal 24V), Let the input from 24V battery. And i require Constant output voltage 24V,3A. Kindly support me to design this circuit. Can i go with Sepic? If yes kindly help me to design?
Thanks in advance.
It's really hard to see what's going on here... you need to actually zoom in on the signal (both in X and Y) so we can see its shape. And again, it's important to see the two signals simultaneously on the same screen.Dear mtwieg,
Here is the waveforms of VC & Sense pins under load connected.
It looks like in this waveform your scope sampling rate is extremely low, probably because you acquired a very wide window of data and then zoomed in on a very small portion of it. Don't do that.Hi,
This is the latest Waveform of drain & gate Pulses with load connected. Kindly go through this. Here am getting the frequency as 36KHZ. But,this design was calculated for 200KHZ. I dnt know why this difference in frequency occurs. How to improve my frequency??
I hope will that voltage drop is due to frequency variation?? Correct me if am wrong.
Thanks in advance.