Part Number: UCC38C42 Tool/software: Hi,
how to design and calculate EMI filter values (common mode choke, X rated capacitor, Y rated capacitor)? is there any spreadsheet or design tool available?
my input voltage is 90vac -265vac, output voltage 15vdc…
Part Number: UCC38C42 I couldn't match bulk capacitance requirement equation (page 25 datasheet) with my derivation.
As per other references and derivations, there should be 2π instead of π.
Can you please check and justify?
Part Number: UCC38C42 Hi Team,
I have a customer reaching out if we are going to EOL the PDIP package of the UCC38C42 with part number UCC38C42P? I see that it is still active in our website, but they did receive a PCN that the PDIP version of this part…
Part Number: UCC38C42 Hello UCC38C42 Experts,
Do we have any information we can share on the max current sourcing capability of the COMP pin?
We specify a typ. and min. which makes good sense in traditional applications but now a special application requires…
Hi,
Is your circuit a flyback - if so, it looks the transformer polarities are not correct. If it is forward then the secondary side should have the output inductor. If this is some different topology, please describe and explain how it can work.
The…
Hello Venkatesh,
Sorry for the delay. I still do not have updates from EDA yet.
As for the schematics, the UCC28C42 and the UCC38C42 are the same device. The only difference is their application (UCC28C42 is industrial while UCC38C42 is commercial). The…
Other Parts Discussed in Thread: UCC38C42 , UC3842 , UC2842 Hi All,
Can I change the UCC38C42 (original from Fuji FA13842) to UC3842?
Please answer me a.s.a.p!
Thx. Imre
Given,
Please take a look at UCC38C42 Family of High-Speed, BiCMOS Current Mode PWM Controllers , App Note by Bill Andreycak. UC2842 has longevity as a legacy PWM controller and this is favored in many industrial, mil, space applications where long term…
Hi Len,
The UCCx8C4x is an enhanced BiCMOS version with pin-for-pin compatibility to the industry standard UCx84xA family. There is a offline flyback design example in Section 9.2 in datasheet.
https://www.ti.com/lit/ds/symlink/ucc38c42.pdf
Below link…
Thank you for your answer!
We find this application note in UC2845A web page.
This is for UCC38C42.
http://www.tij.co.jp/jp/lit/an/slua257/slua257.pdf
Is the soft-start information(p.14) of this application note applicable to UC2845A?
Best regards…
