SOP-7
https://xonstorage.z8.web.core.windo...952AS_link.pdf
-20℃~+85℃ 400Hz~50kHz 51% 800V Isolation Over Voltage Protection、Under Voltage Protection、Short Circuit Protection、Overtemperature protection (OTP)、Constant Current Mode (CC)、Constant Voltage (CV) PFM Modulation Primary-Side Feedback SOP-7 AC-DC Controllers and Regulators ROHS
https://www.ic586.com/ICzixun/5552.html