Other Parts Discussed in Thread: TPL5110
Tool/software:
Hello,
I am looking to use the TPL5110 chip.
I am not using a microcontroller in my circuit.
I am currently using the LMC555CTP but in is draining a cr2032 3v 220mah battery after 2 months. See schematic below.
About the circuit.
The circuit will let the 3v pass through to a remote control to transmit a signal, batteries usually last 2 years. When there is motion or vibration the circuit will "power on" the remote. It with shut down the power after 8 seconds of being stationary with no vibration.
In my current design an LMC555CTP is connected to a vibration switch. If I replace it with a TPL5110 which is rated as 35nA as opposed to 130uA the battery will last a great longer.
1. How do I generate an automatic DONE signal, and set the timing so it doesn't reset?
2. Is this the most appropriate part number?
My goal is to keep the current draw as little as possible.
I went to this link and read the description of the breadboard using the TPL5110. Its claiming the TPL5110 is using 20uA, however the specs shows 35nA. Why the difference?
Ron answered the TPL5110 does use more current at power up to test the timing setting resistor, this is a one and done current.
Although 20uA will be fine but if it can be designed for less would be much better.
Thanks,
Allan
Below is my current schematic.
