Part Number: LM25574 Other Parts Discussed in Thread: LM5137 , LM5149 , LM5148 Tool/software: Hi experts,
As a fresher engineer, designing a power supply board, I need your suggestions on how to approach the design process, where to start, and how to…
Part Number: LM25574 Hello team,
Customer traditionally used LM25574MTX. I advice there was some stock of the Q1 version: LM25574QMTX/NOPB .
EMS warned them that the coating of pins is different.
Is this the case? If so, what different does it make…
Part Number: LM25574-Q1 Other Parts Discussed in Thread: LM25574 There is an error showing while running the simulation model of LM25574-Q1. The error shows like ''Can't resolve .param SS={SS}''. Please support
Other Parts Discussed in Thread: LM25574 , LM46000 Hi,
I'm testing a board with a couple of switchers on it (the only thing that is currently populated). The -8V inverting switcher is making a squealing nose. I have tracked it down to what looks like…
Other Parts Discussed in Thread: LM25574 A customer, Martin Rossi, is trying to use Webench for 14 to 16Vin , -15Vout at 100mA. He is using LM25574 for this purpose. While using Webench, he noted that in OpVals, if you hit "Recalculate", they return with…
The reason I chose high frequency is that since you wanted to run in CCM near light loads, the inductor would be a bit bigger. At lower frequencies the inductor is going to becomes a little more big. For 750kHz, the following changes could be made: L…
I am still trying to determine the answer to the above question. As far as I can tell from the datasheet, if the external sync signal goes high while the LM25574 is still holding the sync i/o pin low, the DC blocking capacitor will charge to the new voltage…
Other Parts Discussed in Thread: LM25574 We have done the WEBBENCH Simulation using an LM25574 to generate +15V from a +15V supply.
The current we need is about 20 to 50mA. We have to supply two opamps.
I have included the WEBBench Desing and the…
Other Parts Discussed in Thread: LM25574 I'm trying to use Webench to design an inverting buck boost power supply with the LM25574. Input 8-14V, Output -9V @ 100 mA, Fsw 700 kHz. Webench gives me a design that is topologically correct. But many of the…
Hi Marc,
Thank you for bringing this to our attention. Yes, it appears you are correct in that for the Inverting Buck-Boost topology, the LM25574 frequency has been capped to 500KHz, instead of 1MHz, as it should. I will make the correction and make…
