Method of Single Event Effects Radiation Hardened Design for DC-DC Converter Based Load Transient Detection

Aiming at the impact of load current change on single-event transient, the essential difference between single-event transient and load transient of DC-DC converter is deeply studied. A hardened circuit based on load transient detection is proposed. The circuit detects the load transient information in time and outputs a control signal to control the single event hardened circuit, thereby realizing the improvement of the transient characteristics of the system under dynamic conditions. Based on the 180 nm bipolar-CMOS-DMOS (BCD) process, the design and physical verification of a boost converter are completed. The experimental results show that the input voltage range is 2.9-4.5 V, the output voltage range is 5.8-7.9 V, and the load current is 0-55 mA. During load transients, the load detection circuit turns off the hardened circuit in time, avoiding system oscillation and widening the dynamic range of the hardening circuit. Under the single-event transient, the output voltage fluctuation of the system does not exceed the maximum ripple voltage, and the single-event transient suppression ability reaches more than 86%, the system can work well with linear energy transfer of about 100MeV cm(2)/mg.