Other Parts Discussed in Thread: BQ40Z50
Hi TI专家:
现有个项目用到BQ4050,在做空载短路测试发现保护之后还没到恢复延时条件就反复打开放电管,请问这是什么原因?目前发现这个IC在不同项目应用上都存在这个问题。
CH2:放电管的Vds短路波形 CH4:短路电流波形
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from talking with the design team and looking at the code it seems the gauge may do a short test again after ASCD in order to check if the short circuit event is still occurring. This may have been changed in the BQ40Z50 firmware compared to BQ4050 code. This is the only thing that would make sense with the given operation, there is no method for hardware to recover a hardware protection.