The invention discloses a multiplexed output
voltage-stabilized source based
blue light LED lamp protection system. The multiplexed output
voltage-stabilized source based
blue light LED lamp protection system mainly consists of a gate drive circuit and a
logic control circuit and is characterized by further comprising a power
amplifier P1, a power
amplifier P2, a pulse comparer U1, a pulse comparer U2, a field-effect tube MOS1, a field-effect tube MOS2, a field-effect tube MOS3, a field-effect tube MOS4, an oscillator and the like, wherein the power
amplifier P1 and the power amplifier P2 are connected with the
logic control circuit, the pulse comparer U1 and the pulse comparer U2 are connected with the
logic control circuit, gates of the field-effect tube MOS1, the field-effect tube MOS2, the field-effect tube MOS3 and the field-effect tube MOS4 are connected with the gate drive circuit, and the oscillator is connected between the negative pole input end of the pulse comparer U1 and the negative pole input end of the pulse comparer U2. The multiplexed output
voltage-stabilized source based
blue light LED lamp protection system has short-
circuit protection,
overvoltage protection and open
circuit protection functions, and
power consumption is low and is only 1 / 3 of the
power consumption of a traditional protection circuit. In addition, the multiplexed output voltage-stabilized source based blue light LED lamp protection
system is provided with a multiplexed output voltage-stabilized source, so that the
electricity demand of the protection circuit can be ensured, external
electromagnetic interference can be effectively avoided, and control flexibility and accuracy are improved.