Radiation hardening auxiliary power supply circuit and method

Abstract

The invention provides an anti-radiation hardening auxiliary power supply circuit and method. The anti-radiation hardening auxiliary power supply circuit comprises an anti-radiation cascade amplification power supply module and a gamma instantaneous dose rate protection module. According to the invention, the anti-radiation cascade amplification power supply module carries out cascade amplification on the input voltage and outputs the power supply voltage and the power supply current to the post-stage load, based on the cascade amplification structure design, the current gain is high, the power supply current and the power supply voltage are still stable even if there is the influence of neutron radiation, and the anti-neutron radiation capability is effectively improved; through a gamma instantaneous dose rate protection module connected with the output end of an anti-radiation cascade amplification power supply module, power supply voltage is pulled down during gamma instantaneous dose rate irradiation, and the power supply voltage is restored when gamma instantaneous dose rate irradiation is eliminated. The problem of structure and function failure of a post-stage load such as a PWM controller during gamma instantaneous dose rate irradiation can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of auxiliary power supply, in particular to an anti-radiation hardened auxiliary power supply circuit and method. Background technique [0002] The current radiation-resistant hardened DC / DC converter uses a PWM controller as the control core, and realizes precise control of the output voltage by controlling the duty cycle of the switching device. In order to reduce its own power consumption, it is mainly manufactured using the BICOMS process. The voltage is generally 10V ~ 12V, and the supply current is generally 5 ~ 15mA. The power supply circuit is generally implemented by a linear voltage regulator circuit, which has the advantages of simple structure and stable power supply voltage. The reference voltage is set through a Zener diode, and then the voltage output is realized by transistor current expansion, but the transistor in the linear voltage regulator circuit After neutron radiation, the current ga...

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Problems solved by technology

The power supply circuit is generally implemented by a linear voltage regulator circuit, which has the advantages of simple structure and stable power supply voltage. The reference voltage is set through a Zener diode, and then the voltage output is realized by transistor current expansion, but the transistor in the linear voltage regulator circuit After neutron radiation, the current gain drops more, and the problem of insufficient supply current is prone to occur

On the other hand, due to the parasitic PNPN structure of the BICOMS process device, self-locking may occur under the gamma instantaneous dose rate irradiation, causing the functional failure of the PWM controller

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