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https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/829789/lm2678-lm2678sx-5-0-nopb-heatsink
您好！
这里有一个随机问题、引脚4接地是否连接到后散热垫？ http://www.ti.com/lit/ds/symlink/lm2678.pdf
谢谢、
对于 TO-220封装、引脚4以电气方式连接到封装的散热器件。
您好、Marshall、
TO-263封装是否相同？
是的，同样的事情也适用：)
