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SUNGROW has obtained a patent for a switching power supply and its protective circuit, which can prevent power devices from being damaged due to frequent startup and final heat accumulation

Article Source：China National Intellectual Property Administration | Author：Financial Sector | Issuing Time：2024.04.15
On April 15, 2024, the financial sector reported that, according to the announcement of the China National Intellectual Property Administration, SUNGROW Co., Ltd. has obtained a patent entitled "a switching power supply and its protective circuit", the authorization announcement number is CN113991611B, and the application date is December 2021.



The patent abstract shows that the present invention provides a switching power supply and its protection circuit, which is set between the power supply pin of the control chip in the switching power supply and the ground through its pull-down execution unit; When there is an abnormal output fault in the switching power supply, the pull-down control unit controls the pull-down execution unit to switch to a path, and then pulls down the voltage of the power supply pin of the control chip to ground, so that in the burp protection mode, each charging of the power supply pin of the control chip starts from 0V and ends at the starting point of the control chip; Compared to the charging process between the undervoltage protection point of the control chip and the starting point in existing technology, this application significantly prolongs the burping cycle, which can avoid damage to the power device due to frequent startup and final heat accumulation caused by the short burping cycle.
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