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TPS6735IP失效

MINGPENG QING
Prodigy 10 points
Other Parts Discussed in Thread: TPS6735

选用的TPS6735IP转换器，上机测试正常，上机后在电源连续多次快速开关切换后，电压下降至无输出，经查是TPS6735IP失效，请问下此器件能否经受电源连续开关切换或是不是器件质量原因。此器件系从电子市采购，从外观看不出问题，银粉脚上有正常的测试刮痕。