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用UCC28019 做的350W/390V PFC 为什么当负载加到270W时,由重载变为空载时,会发出"susu"的响声

Other Parts Discussed in Thread: UCC28019, UCC28019A

各位高人,用UCC28019 做的350W/390V PFC  为什么当负载加到270W时,由重载变为空载时,会发出"susu"的响声?