VDD 电压一直不能稳定,如下图,电路参考datasheet, 变压器匝比Np/NS/NA:43/5/6, 输入电压范围130~470V,输出电压10V/3A
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VDD 电压一直不能稳定,如下图,电路参考datasheet, 变压器匝比Np/NS/NA:43/5/6, 输入电压范围130~470V,输出电压10V/3A
HI
将驱动上电阻尽量减小一些(推荐5ohm左右),10kohm电阻是直接对GND.
另外确认一下snubber电路(你可以借助TI的在线仿真webench获得电路,参考snubber部分设计)