Part Number: UCC256403 Tool/software: Hi Ti,
First, i wish you a happy new year for 2025 !
I'm contacting you because i would like to know what is the frequency range of UCC256403 ? What is the limit of the frequency ?
Have a nice day,
Best regards…
Manikanta Pallantla said: We never used the 40x at such a high resonant frequency. You can give it a try and let us know if you see any issues.
We did operate the UCC25660 close to 500kHz and haven't found any issues.
But that's probably because you…
Part Number: UCC256403 Tool/software: Hi Sir :
I have the following questions regarding this chip ：
Question 1: Is there any way to determine the design margin of OCP2/OCP3 for this chip through testing or theoretical calculations? Question 2: Will the…
Hi TI & Manikanta,
I've found the problem's on my converter. I will listing you my many problems :
I have an error on my SS pin. I put a 80 pF instead of 80 nF. This resolve the Vout step in starting.
I forget to put 4 to 5 times more capacitor…
Part Number: UCC256403
Tool/software:
In the example simulation for UCC25640x (given by slusd90 - june2019) ideal switches are used instead of HIGH side and LOW side MOSFETs. In this simulation model there's no problem getting clean waveforms with high…
Hemanth Sreeperumbudur said: I entered RBW value to be 0kohm and 1uA as initial current in the default circuit downloaded from web. I don't see burst mode until the load is applied, when the load is applied, continuous switching is observed. However, once…
Part Number: UCC256403 Other Parts Discussed in Thread: UCC25630-1EVM-291 Tool/software: Thank you for your continued support. My name is Kurata.
I have the following question about the parts used in the peripheral circuit of UCC256403.
In the example…
Part Number: UCC256403 Tool/software: Hi TI Experts,
I have designed 1.5KW LLC DC/DC converter using UCC246403 after my PFC stage. I have to gain 3% more efficiency to meet my requirement.
My HF transformer details are below.
Core= PQ4040
Np/2=12Turns…
Part Number: UCC256403 Tool/software: Dear Experts
I have tried with the values in the range that disable the burst mode. But burst mode is not disable.
Another thing I observed that after removing upper resistor of BW. I observed that burst mode is…
