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TPS51116发烫问题

Other Parts Discussed in Thread: TPS51116

1,TPS51116在工作时温度很烫

2,我设计的TPS51116输出是1.5V,但实际输出是1.6V ,VDDQ_SET那儿的两个75K的电阻我检查了是好的。应该输出是1.5V,但是输出    是1.6V不知道是为什么?

3,TPS51116的输出电压TPS_VDDQ_1V5和TPS_VTT的纹波很大,特别是TPS_VTT的纹波都成明显的锯齿形了。

4:图见附件。

tps51116.pdf