Hello again Ulrich,
I followed your recommendations and placed the 3.3nF in C220 and Cnew, as well as keeping the 10uF in AOE. Neither of them changed my waveforms.
I then connected a network analyzer to my controller's feedback with the load sharing…
Hi Guanqisheng,
Unfortunately, we don't provide active support for SGEN since it has been deprecated. It's been replaced with DCL 's reference generator which can be found as part of C2000Ware in C2000Ware/libraries/control/DCL, along with the…
Part Number: UCC39002 Other Parts Discussed in Thread: LM25116 Hi, I designed a buck converter using a LM25116. Everything works fine and I want to improve my design and add a load shared controller UCC39002. To design the error amplifier compensation…
Part Number: INA1620 I started with an example model using TI TINA with the INA1620, and modified it for circuits that we are considering for driving the reference for a couple of different resolvers. I am primarily interested in the stability of the…
Vivek,
Can you monitor the TL431/opto feedback voltage during the load transition where the converter is dropping out of regulation. Please make sure there is sufficient to maintain the correct bias on the TL431 and make sure the TL431/opto CTR is working…
Part Number: TPS92692-Q1 Other Parts Discussed in Thread: TPS92692 I'm trying to figure out how to measure the Bode plot of a design that uses a component like the TPS92692. This application note is super helpful in identifying to correct location…
Hi Hirotsugu,
This is the bode plot from the TPS54A20 EVM:
As you can notice the phase is not dipping below 15 degrees. The lower is the dip the higher are the chances that the ripple shows up.
The plots you have attached, specially the 0.85V one, seem…
Reducing R7 decreased the loop gain and the abnormal waveform disappeared. So it is a control loop issue. As Vin or the load changes the instability might return. I recommend they measure the bode plot with a network analyzer to determine the gain margin…
HI Doodi,
a good help here is the LM5118/LM25118 Quick Start Component Calculator (Rev. A)
which can be found on the product page: LM5118-Q1 data sheet, product information and support | TI.com
A deeper insight gives the power stage designer:
Power Stage…