Other Parts Discussed in Thread: TPSF12C1
I hope this email finds you well. I recently reached out with a question, and I would like to expand on that inquiry:
the question was:
"Dear TI Support Team,
I am reaching out regarding the active evaluation module based on the TPSF12C1. During my testing and evaluations,"I've observed that the module operates at a switching frequency of 10kHz. I've adjusted my module to attenuate at 10kHz, but I need it to attenuate at 700kHz for my application.
I have integrated the module into my circuit and utilized the Excel spreadsheet you provided for adjustments. Despite these configurations, I have not been able to achieve the desired switching frequency of 700kHz. I would like to emphasize that I have conducted all necessary validation tests, and the board operates smoothly, but only at the 10kHz frequency.
For your reference, I have attached images, including the schematic of my passive filter. As instructed, I have removed the middle Y-capacitors and added a C_Sens of 680pF and a C_INJ of 4.7nF.
Could you please provide guidance or recommendations on how I can increase the switching frequency of the evaluation module to 100kHz? Your expertise and guidance would be invaluable as this is crucial for the success of my circuit."
I simulated my CM choke using LT_Spice and added it to the Excel attachment, where I also recorded the phase.
I've already followed the Quickstart Guide and adjusted the damping network so that the voltage at the INJ-PIN remains stable at 6V without oscillating.
The issue is that they suggest a "low voltage test" and provide a figure showing the expected voltage profile at the INJ-PIN.
I can achieve this with a square wave voltage source that operates at 10kHz. However, my PSU operates at 700kHz. How can I make the AEF respond faster?
I've tried adjusting the network between the COMP1 and COMP2 pins, but without success.
Could you provide some guidance?
Thank you in advance for your support, and I look forward to your response."
