Other Parts Discussed in Thread: UCC28700
你好,
系统已经有DC24V输入可以用于给UCC28700供电,无需aux winding来提供Vcc,我可以直接采样原边开关管的Vds来代替采样Vaux吗?因为Vds电压波形和Vaux是成比例的,那么采样Vds也同样可以得到副边电压的信息。这样我只需根据Vds和Vaux的比例重新匹配VS端口的分压电阻,从而无需绕制aux winding?
谢谢!
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你好,
系统已经有DC24V输入可以用于给UCC28700供电,无需aux winding来提供Vcc,我可以直接采样原边开关管的Vds来代替采样Vaux吗?因为Vds电压波形和Vaux是成比例的,那么采样Vds也同样可以得到副边电压的信息。这样我只需根据Vds和Vaux的比例重新匹配VS端口的分压电阻,从而无需绕制aux winding?
谢谢!