There is no general international standard for Ithd specifications, only a few large server companies, such as Lenovo, Inspur, etc.
In some of Ithd's demanding scenarios, we are using DSP to do digital PFC to achieve.
However, the cost of DSP is much more expensive than that of ASIC chips such as UCC28180.
Therefore, we wanted to see if we could improve our ASIC to meet the demanding ITHD specifications.
Please ask the original factory:
1. Is there any application with high ITHD requirements to launch ASIC chips?
2. How can the peripheral design of UCC28180 be adjusted to improve ITHD performance?Ideally, what level of iTHD performance is best achieved.