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UCC28780: 下载TIDA-01622的设计文件,在实验时,发现VDD反复重启,请问怎么解决?

Part Number: UCC28780
Other Parts Discussed in Thread: PMP21639

测试板和元器件都按TIDA-01622项目制作,却遇到了UCC28780反复重启的问题。

当VDD达到17.5V时,直接下降到了10V(时间间隔:52.00ms),之后VDD电压又达到17.5V,然后缓慢下降,波形如下图1所示。

图1

此时,HVG和VDD的波形图如下图2所示,其中黄色为VDD波形,绿色为HVG波形。

图2

RUN和HVG的波形如下图3所示,其中绿色代表HVG波形,黄色代表RUN波形。

图3