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TPL5010 Reset Pin 一直处于高电平

Other Parts Discussed in Thread: TPL5010

喂狗信号(watch)由MCU提供,复位信号(RESET)上拉10K。

我们在测试过程中发现当有喂狗信号(高电平脉冲)发送给TPL5010时候,复位信号一直是高电平,不会出现下拉脉冲。

排除MCU影响(去掉MCU)单独测试TPL5010。

给4脚发送喂狗信号(高电平脉冲),6脚依然是高电平(上拉电阻10k保留),不会出现下拉脉冲。

更换了新的TPL5010,工作正常。

因此怀疑IC已经损坏。