Hi Johny,
Please refer to How to Design an Isolated Flyback Converter Using LM5157x/LM5158x (Rev. A) and LM5157EVM-FLY .
LM5157/LM5158 are similar to TPS55340 with higher ratings.
Best Regards,
Feng Ji
Hi Feng,
Thanks for using the e2e forum. In flyback topology, there can indeed be higher overshoots at the SW pin due to the inductor. It is recommended to place a snubber at the two points you have marked in the schematic. Commonly RCD or diode snubbers…
Part Number: LM5157-Q1 Other Parts Discussed in Thread: LM5157EVM-FLY I am trying to design a flyback converter using LM5157-Q1
Is there an EMI performance report of this IC used as a flyback?
My specs are:
Input: 8 to 18V
Output:+15,-8,+15,-8…
Hi Arvind,
based on your schematic your output voltages are isolated from the input voltage.
So the polarity on the input is more or less a don't care - you just swap the supply input the the converter sees again a positive input and the same on the…
Hello,
The customer can use the LM5157 in flyback configuration, there is a flyback EVM with 4 outputs available on the product folder ( https://www.ti.com/tool/LM5157EVM-FLY ), the schematic is at page 13 of the user's guide ( https://www.ti.com/lit…
Hi Stefan,
Actually, The simulated parameter is set according to the LM5157 flyback-EVM that I requested in ti.com. The compensation loop is designed by the application note which can also be download in ti.com (see attachment). The C_COMP is 22nF,…
