Working state feedback circuit of semiconductor laser power supply

Abstract

The utility model discloses a working state feedback circuit of a semiconductor laser power supply, which comprises a voltage feedback circuit, a current feedback circuit, an over-temperature protection circuit, an under-voltage protection circuit, an over-voltage protection circuit and an over-current protection circuit, and is used for feeding collected corresponding working parameters of the semiconductor laser power supply back to a controller. The controller can obtain the parameters and the working state of the semiconductor laser power supply; wherein the current feedback circuit comprises a current sensor, a voltage following circuit and a filter circuit, and the voltage following circuit follows the output voltage of the current sensor; and then the filter circuit performs RC filtering according to the ripple frequency output by the current sensor. According to the utility model, the signal feedback function is perfected, and a plurality of feedback signals are arranged at the control interface of the power supply, so that more states and information of the power supply can be obtained, and the controller can make corresponding actions. Particularly, the waveform of the signal sampled by the current feedback circuit is smoother and can not be interfered by the screen cloth.

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