During the interview, I mentioned this flyback project, which was a replica. I’m not sure how to answer questions about it, nor have I encountered any issues, so I can’t explain how it was designed. Fellow experts, could you share your experiences from the testing process that I could learn from? Thank you so much!
At least take the time to understand the fundamental concepts of the projects you’ve listed. It’s not enough to just write them down—don’t treat interviewers or HR as fools.
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Bro, you really can’t cut it like this—you need to understand the fundamentals even when replicating a design. You must grasp the basics: flyback working principle, RCD snubber, loop compensation, transformer leakage inductance. Otherwise, once the interviewer probes a bit deeper, you’ll be exposed. Don’t just rely on copying ready-made answers; go through the core concepts of this project first. Otherwise, even if you somehow pass the interview, you’ll struggle once you actually get into the role.
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Let me tell you about several common issues encountered when debugging flyback converters—memorize these and you can use them directly:
First, large output spikes and voltage drift under no-load or light-load conditions are usually due to mismatched RCD snubber parameters; simply replacing the resistor and capacitor with appropriate values will suppress the spikes.
Second, transformer squealing under heavy load is typically caused by improper loop compensation; adjusting the RC parameters in the compensation network stabilizes the system.
Third, excessive output ripple can be solved by adding a π-type filter at the output and optimizing the PCB layout of the diode freewheeling path.
These are all common pitfalls you’ll inevitably encounter in project replication—and if asked in an interview, these answers will be flawless.
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Thank you, boss! I really appreciate it!
Understand the basic knowledge related to flyback converters, including topology, component selection for transformers, RCD, MOSFETs, control ICs, output capacitors, etc., and I’ve gone through the calculations once. However, I still lack hands-on experience and in-depth understanding; some aspects were not fully considered. Therefore, I’m reaching out to ask for your advice.
Alright, I’ve grasped the basic knowledge of flyback converters—understood the topology, and went through the selection process for components such as transformers, RCD, MOSFETs, control ICs, output capacitors, etc., including the relevant calculations. However, since I have limited hands-on experience, my understanding isn’t deep enough, and there are certain aspects I haven’t fully considered. Therefore, I’d like to consult with everyone here for advice.