Other Parts Discussed in Thread: TPL5110, TPL5110EVM
Dear
Our company refers to "TPL5110EVM User's Guide" and TPL5110 manual application circuit design One shot mode circuit is as follows:
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Dear
Our company refers to "TPL5110EVM User's Guide" and TPL5110 manual application circuit design One shot mode circuit is as follows:
Question 2. Voltage fluctuations within the supply voltage range can still cause reset?After voltage fluctuation, it is still within the IC power supply range of 1.8~5.5V.The phenomenon of problem 2 does not exist if there is no voltage fluctuation.
Hi There,
Right, so the problem came from the battery voltage. As shown in your picture, there are three power glitches. The time base is 500ms/div. The voltage drop was happen gradually in 200ms to 300ms. This voltage drop did not trigger a "reset". However, the battery voltage will resume back to 3V in a very short period of time. I believe it is this rising edge that trigger a reset to the device. The first two power glitches did not trigger a reset probably because the voltage drop are not low enough.
To resolve this problem, maybe you can try put a 10µF or 100µF capacitor at pin 1 of U3.
As you said, the three power glitches trigger a reset probably because the voltage drop are low enough. when voltage drop happened, the voltage value is still higher than 2V. Shown in the datasheet, Supply voltage range: 1.8V to 5.5V. This moment IC should still work normally. why the problem happens?