Constant current source power supply

Abstract

The invention relates to a constant current source power supply. The power supply comprises a starting circuit, a pulse width control circuit, a rectification and filtering voltage sampling circuit, apower switch tube, a transformer, rectification and filtering circuits and linear voltage regulators, wherein the starting circuit is connected with a primary winding of the transformer through the pulse width control circuit and the power switch tube; the transformer is provided with a feedback winding, and the feedback winding passes through the rectification and filtering voltage sampling circuit and then controls the pulse width control circuit; the transformer is provided with multiple secondary windings, each secondary winding corresponds to a rectification and filtering circuit and a linear voltage regulator, and each secondary winding outputs a power supply through the rectification and filtering circuit and the linear voltage regulator. According to the invention, the feedback winding is designed, and secondary voltage regulator is carried out through the fed back output power supplies, thereby achieving high-performance output of the constant current source power supply, andsolving the problems such as low power conversion efficiency, serious heating of power devices and poor power supply voltage adjustment rate and load adjustment rate.

Description

technical field [0001] The invention relates to a power supply, in particular to a constant current source power supply. Background technique [0002] In the positioning and orientation device system, the constant current source of the accelerometer analog-to-digital conversion circuit determines the accuracy and stability of the analog-to-digital conversion circuit. The requirement is that the power supply of the constant current source has good performance and little mutual influence. [0003] With the requirements of product miniaturization design, higher requirements are put forward for the application range, performance index, volume, weight, cost and efficiency of the constant current source power supply. [0004] The output power of the traditional constant current source power supply will have problems such as low power conversion efficiency, severe heat generation of power devices, poor power supply voltage regulation rate and load regulation rate. [0005] The win...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the background technology, the present invention provides a constant current source power supply, the power supply through the design of a feedback winding, through the feedback of the output power, so as to perform secondary voltage regulation, to achieve the high performance of the constant current source power supply Output, which solves the problems of low power conversion efficiency, serious heating of power devices, poor power supply voltage regulation rate and load regulation rate, etc.

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