Hi, I have designed and built a circuit, the original power supply that I used is 6V DC voltage from a bench top power supply. However, when I try to power up my circuit with two lithium ion button battery (CR2025, 3V each), my circuit cannot turned on. Once the batteries connected to the circuit, the voltage dropped from 5.98V to around 2 to 3V.
The resistance of my circuit is around 358 ohms.
I have connected my circuit to the bench top power supply again, and connected a 0.22 ohms resistor between the output of my circuit and ground, an oscilloscope is connected with both ends of the resistor to see the voltage when I turn on the circuit. There is a voltage spike when I just turned on the circuit.
When the circuit just turned on, the voltage jumps to around 1V and then dropped rapidly to around 8mV. Based on my own calculation, when the circuit just turned on, the current is 4A and then dropped to about 0.036A, which matches the current output from the bench top power supply (0.02A to 0.04A).
However, I am not reapply familiar with power supply, Can anyone please explain to me that why my circuit can be power up by an 6V voltage from a bench top power supply but not a 6V from a battery? How can I make it to be able to supply by the battery?
Thanks a lot in advance!
The resistance of my circuit is around 358 ohms.
I have connected my circuit to the bench top power supply again, and connected a 0.22 ohms resistor between the output of my circuit and ground, an oscilloscope is connected with both ends of the resistor to see the voltage when I turn on the circuit. There is a voltage spike when I just turned on the circuit.
When the circuit just turned on, the voltage jumps to around 1V and then dropped rapidly to around 8mV. Based on my own calculation, when the circuit just turned on, the current is 4A and then dropped to about 0.036A, which matches the current output from the bench top power supply (0.02A to 0.04A).
However, I am not reapply familiar with power supply, Can anyone please explain to me that why my circuit can be power up by an 6V voltage from a bench top power supply but not a 6V from a battery? How can I make it to be able to supply by the battery?
Thanks a lot in advance!