Same. The power supply of the LED lamp in normal operation must be the same as the output voltage of the connected load and the disconnected load, and must meet the power supply requirements, and there will never be high and low voltage between the connected load and the disconnected load. Unless there is a problem or malfunction in the power supply circuit.
Led driver chips can be divided into: constant voltage driver chips, constant current driver chips and pulse driver chips. Among them, the constant voltage driver chip is generally our common DC\/DC booster chip. The advantage of this scheme is that the chip is cheap without complex peripheral circuits. However, only a constant voltage to drive the LED will cause the circuit current when the drive output is uncontrollable. The consistency of LED brightness cannot be guaranteed.