A 5V/3A adjustable power supply, after connecting to the device, the measured current consumption is 700ma, and the terminal voltage drops to 4.85-4.89V. If the instantaneous current reaches about 1A, the terminal voltage will instantly drop to 3.65-4.5V, which will cause the system to restart. Why is the voltage pulled down and the output power is enough?
Shah Posted on November 19, 2020
Consider the contact resistance of the clip and the line loss?
Rahim Posted on November 19, 2020
Is it because the resistance is relatively large and the partial voltage is too large, which leads to low voltage in the subsequent stage, and the wiring should meet the maximum current. Another reason is that the power chip limits the current. You can use the load to test the maximum output current independently.
Caspar Posted on November 19, 2020
4,85V is measured in what state, is the board working normally, it should not be able to enter the system normally with the same power supply, because it restarts when it takes an instant 1A.
