Part Number: UC3843A Other Parts Discussed in Thread: UC3843 , Tool/software: We always use UC3843 in our designs.. In our new SMSP;
We design a 10W 72VDC input 5V output Flyback Converter with UC3843A with 20V VCC aux winding
The problem is when…
Part Number: UC3843A Other Parts Discussed in Thread: UC3843 Tool/software: Dear Sir,
I want to design a buck converter Rating of
Input= 55-80 V DC
Output= 50V,10A
with IC UC3843 at a switching frequency of 51Khz.
Mosfet used is Rm150N100 with…
Part Number: UC3843A Tool/software: Hi all,
My customer consider Flyback circuit is configured and used as shown in Fig. 7-1 of the datasheet.
I would like to know how to design resistor Ra and capacitor Ca connected between COMP (1pin) and FB …
Part Number: UC3843A Hi
I'm using a UC3843A PWM controller for a buck converter topology. for the light load condition everything is working fine, but when I increase the output power the duty cycle drops from 96% to 50%! this cause drop in the output…
Part Number: UC3843A Other Parts Discussed in Thread: TL431 Tool/software: Good morning Is there an Application Note or a White Paper that addresses the topic "how to reduce the oscillation frequency of the UC384x family PWM controllers as the duty cycle…
Part Number: UC3843A Tool/software: Customer is finding 2nd source. I'd like to know if UC3843ADTR is better one to be p2p compatible with On-Semi competition one? Or any recommendation? thanks.
Part Number: UC3843A Hello
Ive designed a mosfet driver using a UC3843A. Have ramp oscilations100kHz at pin 4 but no oscilations at output pin 6, can you help
Part Number: UC3843AUC3843A support,
Our customer is using the UC3843A in an isolated DC-DC flyback design. The output isn't stable, oscillating from about 3 to 3.6V, while the target is 3.3V. They followed the Webench design very closely, although…
Hello Ahmed,
There is probably an issue in your circuit that is pulling VCC below the UVLO threshold.
Without being able to review the schematic I can only guess there is some issue at startup. If the capacitor on VCC is set too low and the startup…
Part Number: UC3843A Dear Sir,
I am facing issue while designing DC to DC converter using device UC3843A.
Input Voltage- 18V Dc to 60V Dc
Required output- 12V Dc.
Required Current- 0.5A.
Issue:- Not able to perform load regulation.
please…
