Lossless screening method and device of irradiation-resistance performances of pulse width modulation devices

Abstract

The invention provides a lossless screening method and device of irradiation-resistance performances of pulse width modulation devices. The method includes the steps that before a pulse width modulation device which serves as a random subsample is irradiated, a 15 Hz noise-point frequency value and an output duty ratio are obtained; an input sinking current is obtained after the pulse width modulation device which serves as the random subsample is irradiated; the output duty ratio and the 15 Hz noise-point frequency value serve as information parameters, the input sinking current serves as an irradiation performance parameter, multiple linear regression equations are established, and coefficient vectors in the multiple linear regression equations are calculated; on the basis of the coefficient vectors, and lossless-screening regression prediction equations between the information parameters and the irradiation performance parameter are established; the lossless-screening regression prediction equations are adopted to predict the irradiation-resistance performance of a single pulse width modulation device, and other pulse width modulation devices in the same batch are screened. According to the lossless screening method and device, on the premise that the pulse width modulation devices are lossless, the accurate and high-efficiency irradiation-resistance performance testing and screening are conducted on components and parts.

Description

Technical field [0001] The invention relates to the technical field of electronic appliances, and in particular to a method and device for non-destructive screening of the anti-radiation ability of a pulse width modulator. Background technique [0002] Pulse width modulator is an important part of modern switching power supply, pulse width modulator (PWM) used in space radiation environment, under the action of space charged particles and various rays, its performance will change significantly, including output pulse The absence, deformation, latch of the hour hand control and the transients of the control loop; therefore, how to test the anti-radiation ability of the pulse width modulator used in the space environment, and then screen out the pulse width with strong anti-radiation ability The use of the debugger is of great significance. [0003] In the prior art, there are two main methods for testing and screening the radiation resistance of pulse width modulators for aerospace...

AI Technical Summary

Problems solved by technology

That is, for the devices manufactured by the same process, the functional relationship between the information parameters and the radiation performance parameters is found out by conducting irradiation tests on a certain number of random samples, and then the screening of unirradiated devices is realized. However, in the prior art The regression analysis method ignores the relationship between irradiation and internal defects of PWM devices, resulting in inaccurate regression prediction equations, which ultimately affects the accuracy and reliability of pulse width modulator screening

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