Radiation-proof power supply controller circuit and control method thereof

Abstract

The invention discloses an anti-radiation power supply controller circuit and a control method thereof, and belongs to the technical field of power electronics, the anti-radiation power supply controller circuit comprises a power loop and a control loop, the power loop comprises an input filter circuit, a transformer and a rectification filter circuit, the input filter circuit is used for receiving an input signal, the transformer is used for receiving an output signal, and the rectification filter circuit is used for receiving an output signal; noise in the input signal is filtered out, and the input signal is output to the transformer and the pulse width modulator; the transformer is used for receiving an input signal subjected to filtering processing, performing voltage regulation and electrical isolation on the input signal and outputting the signal to the rectifying and filtering circuit; the rectifying and filtering circuit is used for rectifying and filtering a signal output by the transformer and outputting a stable direct-current voltage as the output of the power supply controller; the control loop comprises a pulse width modulator, an anti-radiation latch and a switch transistor; according to the invention, the signal stability of the main switch transistor can be effectively improved, so that the time sequence consistency and reliability of the power supply module are improved.

Description

Technical Field

[0001] The invention relates to an anti-radiation power supply controller circuit and a control method thereof, belonging to the technical field of power electronics. Background Art

[0002] With the rapid development of modern electronic technology, power electronic equipment is widely used in various fields such as aerospace, military, industrial automation and new energy technology. In certain specific application environments, such as space, near nuclear reactors or in medical imaging equipment, electronic equipment will be exposed to radiation from high-energy particles (such as protons, alpha particles, etc.). This radiation may cause single-event effects (SEE), the most common form of which is single-event upset (SEU), that is, the transient current caused by radiation particles passing through semiconductor devices may cause data in the timing circuit to change. As a key component of the system, the power module may cause errors in the control signal of the power converter due to single-event upsets, which directly affects the reliability and efficiency of the entire system. Existing power supply radiation-resistant designs often use radiation-resistant materials, three-mode redundant circuits, shielding technology and optimized layout, but these measures often increase design complexity, cost, power consumption and occupy more space while improving circuit reliability, and may affect the performance and efficiency of the power supply to a certain extent. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a radiation-resistant power supply controller circuit and a control method thereof, which can effectively improve the signal stability of the main switch transistor, thereby improving the timing consistency and reliability of the power supply module.

[0004] To achieve the above object, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides a radiation-resistant power supply controller circuit, comprising: A power circuit, the power circuit comprising an input filter circuit, a transformer, and a rectifier filter circuit, wherein: The input filter circuit is used to receive an input signal, filter out noise in the input signal, and output it to the transformer and the pulse width modulator; The transformer is used to receive the filtered input signal, perform voltage adjustment and electrical isolation on it, and then output the adjusted signal to the rectifier and filter circuit; The rectifier and filter circuit is used to rectify and filter the signal output by the transformer, and output a stable DC voltage as the output of the power controller; A control loop, the control loop comprising a pulse width modulator, a radiation-resistant latch and a switching transistor, wherein: The pulse width modulator is used to receive the signal input by the input filter circuit, generate a control signal after processing, and control the conduction time of the switch transistor to stabilize the output current at a predetermined target value; The radiation-resistant latch is connected between the pulse width modulator and the switch transistor, and is used to latch the input signal at the rising edge or falling edge of the clock signal, and keep this state unchanged in the next one or more clock cycles.

[0005] Furthermore, the control loop also includes: a current detection circuit, which is used to monitor the current at the switching transistor and compare it with a set reference value through a comparator to generate an error signal, and feed the error signal back to the pulse width modulator.

[0006] Furthermore, the control loop also includes: a feedback circuit, which is connected between the output end of the power loop and the pulse width modulator, and is used to monitor the output voltage and feed back the output voltage to the pulse width modulator.

[0007] Furthermore, the radiation-resistant latch adopts a DICE structure, which includes at least one pair of mutually redundant logic units, each logic unit has the same input and output, and under normal working conditions, the main logic unit processes the signal, and when a single particle upset occurs, the redundant logic unit outputs a correct signal to prevent the propagation of an erroneous logic value.

[0008] In a second aspect, the present invention provides a control method of a radiation-resistant power supply controller circuit according to any one of the above items, comprising: Receive an external input power signal, filter the signal through an input filter circuit to remove noise and interference, and obtain a pre-processed input signal; The pre-processed input signal is sent to the transformer for voltage conversion and electrical isolation is achieved through the transformer; The AC signal output by the transformer is input into the rectifier and filter circuit and converted into a smooth DC voltage as the output of the power controller; The input signal from the input filter circuit is received through the pulse width modulator, and a control signal is generated after processing to control the conduction time of the switching transistor so that the output current is stabilized at a predetermined target value; Wherein, at the rising edge or the falling edge of the clock signal, the control signal generated by the pulse width modulator is latched by the radiation-resistant latch.

[0009] Furthermore, the control method also includes: monitoring the current at the switching transistor through a current detection circuit and comparing it with a set reference value through a comparator to generate an error signal, and feeding the error signal back to the pulse width modulator, so that the pulse width modulator adjusts its duty cycle according to the error signal, controls the conduction time of the switching transistor, and stabilizes the output current at a predetermined target value.

[0010] Furthermore, the control method also includes: monitoring the output voltage through a feedback circuit, and feeding back the output voltage to a pulse width modulator, so that the pulse width modulator adjusts its duty cycle according to the error signal, controls the on-time of the switching transistor, and stabilizes the output current at a predetermined target value.

[0011] Furthermore, the control method also includes: verifying the single-particle upset resistance of the radiation-resistant latch through HSPICE simulation, and the specific steps are: under the conditions of 22 nm PTM process, temperature 25°C, and power supply voltage 0.8V, fault injection simulation is performed on the internal nodes of the radiation-resistant latch to verify that it can self-recover to the correct logic value when a single-particle upset occurs at any node.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a radiation-resistant power supply controller circuit and a control method thereof. On the one hand, the radiation-resistant latch can improve the timing consistency of a power supply module; on the other hand, the radiation-resistant latch effectively maintains the correct logic signal and improves the reliability of the power supply module in a radiation environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Shown is the functional block diagram of the power module.

[0014] Figure 2 Shown is the transistor-level circuit diagram of the radiation-hardened latch DICE.

[0015] Figure 3 Shown is a simulated fault injection diagram of a latch immune to single event upset. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0019] Embodiment 1: This embodiment introduces a radiation-resistant power supply controller circuit, including: A power circuit, the power circuit comprising an input filter circuit, a transformer, a rectifier filter circuit, a current detection circuit and a feedback circuit, wherein: The input filter circuit is used to receive an input signal, filter out noise in the input signal, and output it to the transformer and the pulse width modulator; The transformer is used to receive the filtered input signal, perform voltage adjustment and electrical isolation on it, and then output the adjusted signal to the rectifier and filter circuit; The rectifier and filter circuit is used to rectify and filter the signal output by the transformer, and output a stable DC voltage as the output of the power controller; A control loop, the control loop comprising a pulse width modulator, a radiation-resistant latch and a switching transistor, wherein: The pulse width modulator is used to receive the signals input by the input filter circuit, the current detection circuit and the feedback circuit, generate a control signal after processing, and control the conduction time of the switch transistor so that the output current is stabilized at a predetermined target value; The radiation-resistant latch is connected between the pulse width modulator and the switch transistor, and is used to latch the input signal at the rising edge or falling edge of the clock signal, and keep this state unchanged in the next one or more clock cycles; The current detection circuit is used to monitor the current at the switching transistor and compare it with a set reference value through a comparator to generate an error signal, and feed the error signal back to the pulse width modulator; The feedback circuit is connected between the output end of the power loop and the pulse width modulator, and is used for monitoring the output voltage and feeding the output voltage back to the pulse width modulator.

[0020] The radiation-resistant latch adopts a DICE structure, which includes at least one pair of mutually redundant logic units, each of which has the same input and output. Under normal working conditions, the main logic unit processes the signal, and when a single particle upset occurs, the redundant logic unit outputs a correct signal to prevent the propagation of an erroneous logic value.

[0021] The contents involved in the above embodiment are described below in conjunction with a preferred embodiment.

[0022] This embodiment provides a radiation-resistant power supply controller circuit, which uses a radiation-resistant latch to control the working state of the main switch transistor. The specific working principle is as follows: Figure 1 and Figure 2 As shown. The power module realizes voltage conversion through the cooperation of the power circuit and the control circuit. The power circuit is responsible for processing the actual conversion process of electric energy, and the control circuit is responsible for managing the entire conversion process. An anti-radiation latch is added to the control loop to enhance the stability of the system, and the anti-single-particle upset performance of the latch is verified through HSPICE simulation to test the feasibility and reliability of this invention.

[0023] Figure 1The figure shows the principle block diagram of the power module. The module consists of two parts: the power circuit and the control circuit. The power circuit uses the input filter circuit to filter out the noise in the input power supply. In the isolated design, the input signal is adjusted by the transformer and provides electrical isolation. Finally, a stable DC voltage is output through the rectifier filter circuit. The control circuit contains a sensitive module, which includes a transistor and a feedback circuit. MOSFET, as a switching transistor, controls energy transmission by switching states at high frequency: when the MOSFET is turned on, the current flows into the energy storage element (such as an inductor or transformer) to store energy; when the MOSFET is turned off, the stored energy is released and transmitted to the load, thereby realizing the energy conversion from input to output, which determines the efficiency and performance of the power supply. In addition, the gate oxide layer of the MOSFET is very thin and is easily damaged by radiation in a radiation environment. The feedback circuit is used to detect the output voltage and provide a feedback signal to ensure stable output. The feedback circuit is often implemented using a reference voltage source, which includes complex circuits such as amplifiers, comparators, and triodes that are sensitive to radiation. Any failure of these components may cause the reference voltage source to be unable to provide a stable reference voltage.

[0024] In the power module, the modulator adjusts the pulse width modulation (PWM) signal through the current detection circuit and the feedback circuit. The current detection circuit monitors the actual current and compares it with the set reference value through the comparator. The error signal generated is used to adjust the duty cycle of the PWM signal, thereby controlling the on-time of the main switching transistor to ensure that the output current is stable at the predetermined target value. At the same time, the feedback circuit monitors the output voltage and keeps the output voltage stable through the reference voltage source. Through the combined effect of these two, the modulator can accurately control the power output and achieve stable and efficient energy transmission.

[0025] The latch enhances the timing consistency of the system by storing the state inside it and maintaining the state under the control of the clock signal. The latch clock signal of this design is given by the modulator. When the input signal arrives, the latch latches the input signal at the rising or falling edge of the clock signal and maintains this state unchanged in the next one or more clock cycles, thereby ensuring the consistency and stability of the data during transmission and avoiding errors caused by signal fluctuations or noise. In this way, the latch ensures that the time relationship between the output signal and the input signal is stable, enhancing the timing consistency of the system.

[0026] Figure 2The figure shows the transistor-level circuit diagram of the radiation-resistant latch DICE. DICE (Dual Interlocked Storage Cell) is a classic reinforcement structure proposed by the French TIMA laboratory in 1996. This structure can enhance the robustness of the circuit to single-particle effects, thereby improving the fault tolerance of the system. Single-particle effects can cause particle energy deposition, resulting in incorrect changes in the circuit state. This logic error may cause system failure. Therefore, the DICE structure has been widely used in application scenarios such as spacecraft and nuclear power plants that have strict reliability requirements. The DICE circuit does not require a specific transistor size, and uses a small number of transistors to effectively reduce the chip area. The core concept of its circuit is to ensure fault tolerance through a redundancy mechanism to ensure that the circuit is stable and reliable. Each logic unit has a corresponding redundant logic unit, and their inputs and outputs are the same. Under normal working conditions, the main logic unit is responsible for processing signals; when a single-particle flip occurs, the redundant logic unit outputs the correct signal to prevent the propagation of incorrect logic values.

[0027] Figure 3 The figure shows the fault injection diagram of the DICE latch immune to single particle upset. HSPICE was used to perform simulation analysis when verifying the latch's radiation resistance. The simulation conditions were 22 nm PTM process, temperature 25°C, and supply voltage 0.8V. The red lightning symbol in the figure indicates that fault injection is performed at this node. Faults are injected into the four internal nodes respectively, and any node can recover to the correct logic value. The simulation proves that the latch can fully tolerate single particle upsets.

[0028] Embodiment 2: This embodiment provides a control method of the radiation-resistant power supply controller circuit according to any one of Embodiment 1, including: Receive an external input power signal, filter the signal through an input filter circuit to remove noise and interference, and obtain a pre-processed input signal; The pre-processed input signal is sent to the transformer for voltage conversion and electrical isolation is achieved through the transformer; The AC signal output by the transformer is input into the rectifier and filter circuit and converted into a smooth DC voltage as the output of the power controller; The input signal from the input filter circuit is received through the pulse width modulator, and a control signal is generated after processing to control the conduction time of the switching transistor so that the output current is stabilized at a predetermined target value; Wherein, at the rising edge or falling edge of the clock signal, the control signal generated by the pulse width modulator is latched by the radiation-resistant latch; The current at the switching transistor is monitored by a current detection circuit and compared with a set reference value by a comparator to generate an error signal, and the error signal is fed back to the pulse width modulator, so that the pulse width modulator adjusts its duty cycle according to the error signal, controls the on-time of the switching transistor, and stabilizes the output current at a predetermined target value; The output voltage is monitored by a feedback circuit and fed back to the pulse width modulator, so that the pulse width modulator adjusts its duty cycle according to the error signal, controls the on-time of the switching transistor, and stabilizes the output current at a predetermined target value; The single-particle upset resistance of the radiation-resistant latch is verified by HSPICE simulation. The specific steps are: under the conditions of 22nm PTM process, temperature 25°C, and power supply voltage 0.8V, fault injection simulation is performed on the internal nodes of the radiation-resistant latch to verify that it can self-recover to the correct logic value when a single-particle upset occurs at any node.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A radiation-resistant power supply controller circuit, characterized in that: include: A power circuit, the power circuit comprising an input filter circuit, a transformer, and a rectifier filter circuit, wherein: The input filter circuit is used to receive an input signal, filter out noise in the input signal, and output it to the transformer and the pulse width modulator; The transformer is used to receive the filtered input signal, perform voltage adjustment and electrical isolation on it, and then output the adjusted signal to the rectifier and filter circuit; The rectifier and filter circuit is used to rectify and filter the signal output by the transformer, and output a stable DC voltage as the output of the power controller; A control loop, the control loop comprising a pulse width modulator, a radiation-resistant latch and a switching transistor, wherein: The pulse width modulator is used to receive the signal input by the input filter circuit, generate a control signal after processing, and control the conduction time of the switch transistor to stabilize the output current at a predetermined target value; The radiation-resistant latch is connected between the pulse width modulator and the switch transistor, and is used to latch the input signal at the rising edge or falling edge of the clock signal, and keep this state unchanged in the next one or more clock cycles.

2. The radiation-resistant power supply controller circuit according to claim 1, characterized in that: The control loop further includes: a current detection circuit, which is used to monitor the current at the switch transistor and compare it with a set reference value through a comparator to generate an error signal, and feed the error signal back to the pulse width modulator.

3. The radiation-resistant power supply controller circuit according to claim 2, characterized in that: The control loop further includes: a feedback circuit, which is connected between the output end of the power loop and the pulse width modulator, and is used to monitor the output voltage and feed back the output voltage to the pulse width modulator.

4. The radiation-resistant power supply controller circuit according to claim 3, characterized in that: The radiation-resistant latch adopts a DICE structure, which includes at least one pair of mutually redundant logic units, each of which has the same input and output. Under normal working conditions, the main logic unit processes the signal, and when a single particle upset occurs, the redundant logic unit outputs a correct signal to prevent the propagation of an erroneous logic value.

5. A control method for a radiation-resistant power supply controller circuit according to claim 4, characterized in that: include: Receive an external input power signal, filter the signal through an input filter circuit to remove noise and interference, and obtain a pre-processed input signal; The pre-processed input signal is sent to the transformer for voltage conversion and electrical isolation is achieved through the transformer; The AC signal output by the transformer is input into the rectifier and filter circuit and converted into a smooth DC voltage as the output of the power controller; The input signal from the input filter circuit is received through the pulse width modulator, and a control signal is generated after processing to control the conduction time of the switching transistor so that the output current is stabilized at a predetermined target value; Wherein, at the rising edge or the falling edge of the clock signal, the control signal generated by the pulse width modulator is latched by the radiation-resistant latch.

6. The control method of the radiation-resistant power supply controller circuit according to claim 5, characterized in that: The control method also includes: monitoring the current at the switching transistor through a current detection circuit and comparing it with a set reference value through a comparator to generate an error signal, and feeding the error signal back to the pulse width modulator, so that the pulse width modulator adjusts its duty cycle according to the error signal, controls the on-time of the switching transistor, and stabilizes the output current at a predetermined target value.

7. The control method of the radiation-resistant power supply controller circuit according to claim 5, characterized in that: The control method also includes: monitoring the output voltage through a feedback circuit, feeding back the output voltage to a pulse width modulator, so that the pulse width modulator adjusts its duty cycle according to the error signal, controls the on-time of the switching transistor, and stabilizes the output current at a predetermined target value.

8. The control method of the radiation-resistant power supply controller circuit according to claim 5, characterized in that: The control method also includes: verifying the single-particle upset resistance of the radiation-resistant latch through HSPICE simulation, and the specific steps are: under the conditions of 22nm PTM process, temperature 25°C, and power supply voltage 0.8V, fault injection simulation is performed on the internal nodes of the radiation-resistant latch to verify that it can self-recover to the correct logic value when a single-particle upset occurs at any node.

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