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有关TPS51100芯片发烫问题

Other Parts Discussed in Thread: TPS51100

最近布了一块板子,使用TPS51100给DDR供电,测试时发现芯片很烫,芯片表面温度至少有80度以上,布线时没有按手册上的散热要求走线,线走的比较细,是因为布线原因导致芯片很烫吗?还是由于点流过大导致的?望指导!