DC-DC Converters with Burst Mode Technique

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SUMMARY

The discussion focuses on the implementation of DC-DC converters utilizing the Burst Mode technique to maintain constant output voltage under varying line and load conditions. The user has integrated a feedback loop from the load resistor to compare the output voltage with a reference voltage, but is encountering issues with the comparator not generating the expected pulse output. Suggestions include ensuring proper grounding on the feedback network to resolve the floating load issue, which may be affecting the circuit's performance.

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  • Understanding of DC-DC converter design principles
  • Familiarity with Burst Mode operation in power electronics
  • Knowledge of feedback loop configurations in electronic circuits
  • Experience with comparator circuits and their applications
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Electrical engineers, power electronics designers, and students working on DC-DC converter projects who need to understand feedback mechanisms and Burst Mode operation.

uhdam
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Hello Everyone,

I am working on DC-DC converters. The actual approach of my circuit is that to maintained the output voltage remains constant for both line and load regulation. So that, I added the feedback loop of my circuit from the load resistor. To maintained the constant output voltage, I used (Bust Mode technique) to compare with two signals which are output voltage and reference voltage, after comparing both signal the comparator gives error signal. After that, another comparator compares with the generated error signal and pulse signal which should give the pulse of comparator output to the transistor. But, its not giving the pulse still its showing the error signal only. So, what should I have to do to achieve my goal.

Below I have attached the circuit image. So, please see the circuit image and give me the suggestions.
 

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I think the load is floating (well, 1Gohm anyway) relative to the feedback network. Try adding a ground on R1.
 

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