Hi team,
What is the maxium voltgae VFF pin can stand of UCC2818A-Q1, since i notice on datasheet, the VFF voltage only shows around 4.7V as below. Does this mean, the VFF voltage can not exceed 4.7V?
Best Regards,
Gene
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Hi team,
What is the maxium voltgae VFF pin can stand of UCC2818A-Q1, since i notice on datasheet, the VFF voltage only shows around 4.7V as below. Does this mean, the VFF voltage can not exceed 4.7V?
Best Regards,
Gene
Hello Gene,
VFF is an output pin and its voltage value is a representation of the RMS input voltage.
It can never be above the internal 7.5V reference level.
Its operational range should vary from about about 1.4V to 4.7V as shown in the curve above.
Regards
John
Hi John,
As I notice on datasheet figure 5, Typical Application Circuit, the Vline is 85-270Vac.
for customer requirements, if Vline ranges from 70-280Vac, can the Vff go beyond 4.7V? Or in this case how could customer adjust to use?
Best Regards,
Gene
Gene
This is a separate question and requires a separate posting.
If you feel the previous question was answered then please mark this posting as resolved.
Regards
John