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TPS22810DVB发热严重,冒烟,哪位大哥帮我解答下,谢谢!

Other Parts Discussed in Thread: TPS22810

电路描述如下: TPS22810  输入电压12V,输出串联12欧姆电阻,理论电流1A左右,实际发现开关打开后TPS22810发热严重,冒烟,迅速关掉,未损坏。

TPS22810数据手册,TPS22810DBV最大电流2A,应该是没有问题的,不知道问题出在哪?

哪位大哥帮我解答下,谢谢!