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您好,
建议从以下方面排查原因:
1)热风枪100℃,实际的工作温度是否过温。
2)高温下时钟是否稳定,如使用的是内部时钟源,可以尝试补偿一下。
如仍有问题,建议去Customer support center | TI.com申请失效分析。