Improving the Reliability of DC-DC Power Supply by Reserving Feedback Signals

The paper deals with the problem of improving reliability DC-DC power supplies pulse-width modulation. topicality work is related to importance supply issues in modern electronics, since quality operation consumer electrical appliances, including critical ones, directly depends on serviceability sources. object study feedback circuits aimed at stabilization parameters consumers. Failures mentioned most often occurs due electronic components degradation under harsh operating conditions as well severe mechanical overloads. Such failures are dangerous for uncontrolled increase output voltage and current. To avoid this, a new method reserving signals presented which implemented basis flyback topology. Feedback formed from optocoupler located load side auxiliary winding transformer, together forming two independent control circuits. Only one circuit performs any given moment time. If these fails, second can simply replace it its operation. proposed does not require digital signal processing algorithms or microprocessor modules be cheap, widely available analog chips that perform voltage. As result, sudden loop failure solved equipment increased. validity confirmed by results computer simulation use MatLab-Simulink environment. obtained used design fault-tolerant secondary operate conditions.