Part Number: UC2843A Hi,
i am using UC2843A for a low voltage flyback. (20V .. 60V input and 24V output with 2.7A and 200KHz). i choose all the parameters as in Webench design recomendation.
Vref (5V) is constant and OK. RC pin is also OK. CS pin is also…
Part Number: UC2843A Other Parts Discussed in Thread: UCC28740 , UC2843 Hi
I need to design DC DC converter using UC2843A having input voltage 40 - 60VDC and variable output 10A current limit. This will be used to charge the Li ion battery having BMS in…
Part Number: UC2843A Hello Team,
My Customer is having an issue with their current mode PWM controller for a buck converter. They are seeing noise being induced on the COMP pin of the UC2843A part and adding a 470pF filtering capacitor has resolved the…
Part Number: UC2843A Hi Team,
Our customer would like to confirm if it is possible to defeat the internal error amplifier by driving the comp pin directly. According to him, t here is a legacy design that uses that technique and he was curious if it is…
Part Number: UC2843A We have buck supply designed based on UC2843 and i'm trying to simulate using LTspice. From below PSpice model which one works for me and what is the difference. Also, inside there is a "steady" and "start" .sub circuit are there…
Part Number: UC2843A Other Parts Discussed in Thread: UC2845A , Hi,
Could you please let me know the comparison between UC2843A and UC2845A?
Thanks and best regards, M. HATTORI.
Part Number: UC2843A
Hi
Our customer heard strange noise by vibrating inductor and capacitor because of operation intermittently.
I got their schematic and specification from customer so please let me share it with you internally.
Thank you and best…
Part Number: UC2843A-Q1 Other Parts Discussed in Thread: UC2843 Tool/software: WEBENCH® Design Tools Hello,
I am not able to understand the function of auxiliary winding of the flyback transformer connected to the Vcc pin of the switcher. Input DC vol…
Part Number: UC2843A Other Parts Discussed in Thread: UC2842A Hi team,
My customer test the surface temperature of UC2842A and UCC2843A is greater than 85℃. And they calculate the junction temperature by the function--
Tj =Tc+PD*RθJC, where PD is the power…