The best place to start is the official website of the manufacturer. The LZC8650C seems to be from Taiwan Semiconductor Company, Ltd. (or possibly another firm; it might be a challenge to pinpoint without more context). Look for "Datasheet" or "Product Catalog" sections on their website.
Search for "LZC8650C" filetype:pdf site:mouser.com . This Google dork forces the search to look only for PDFs on the distributor's secure server.
Zero Crossing Detection; detects inductor current zero point.
A better datasheet includes min/typ/max values across temperature (-40°C to +125°C). Specifically for the LZC8650C, demand: