Part Number: UCC28711 It is understood that the switching frequency of UCC28711 varies with output. (I have seen that UC28C40 is used by connecting resistors and capacitors for user settings).
Looking at the datasheet of UCC28711, there are frequency…
Part Number: UCC28711 Other Parts Discussed in Thread: TIDA-00173 , , PMP22288 Dear Sir,
As per application note : TIDA-00173 (400- to 690-V AC Input 50-W Flyback Isolated Power Supply Reference Design for Motor Drives), shows RC filter in voltage feedback…
Hi Bert,
Thank you for the interest in UCC28711.
Yes, AUX can be loaded with the extra 100mA. But there will be regulation issues at very iight load, as aux winding could be loaded more when compared to the main winding.
Regards,
Harish
Part Number: UCC28711 Other Parts Discussed in Thread: TIDA-00173 , When comparing TIDA-00173 reference design guide and design calculator spreadsheet UCC28710-17 Excel Design Tool , different formulas are used for calculating C DD capacitance (at pin VDD)…
Part Number: UCC28711 Other Parts Discussed in Thread: PMP22288 I am using TIDA-00173 reference design guide and I do not see any mention of how the RCD+Z clamp was selected for the design.
I would like to know more details about component selection for…
Part Number: UCC28711 Hey team,
Should there be any concerns about directly tying the NTC pin of the UCC28711 to ground? What is the "pull-up current" of 90-125uA in the datasheet?
Is this an accurate representation of a shutdown circuit or is…
Part Number: UCC28711 Dear team
I have a question over the NTC pin.
If the NTC pin is pulled down due to high input voltage (used for overvoltage protection), when the input voltage back to normal again, NTC is pulled high but will the controller run…
Part Number: UCC28711 Other Parts Discussed in Thread: TIDA-00173 Hello,
In our application, we also need to draw current from the auxiliary winding (approx. 50mA / 15V). But if we load the AUX output, the voltage drops to 10V (with 50mA) immediately…
Part Number: UCC28711 Hello:
If I added a small 10 Ohm resistor in series with the upper resistor of the divider for the VS pin, will it offer the possibility to measure a small signal loop response by injecting a small signal sweep in a manner similar…
Part Number: UCC28712 Other Parts Discussed in Thread: UCC28710 , , UCC28711 , UCC28780 Hello
We have a module use generally use UCC28710 dbr and it works fine.
Due to shortage , we bought some UCC28712 thinking it should make no difference because we do…