What to do if the input voltage of the power supply module is too high
Thread Content
What should be done when the input voltage of the power supply module is too high? Excessively high voltage will inevitably cause faults; in severe cases, it can even damage the circuits, preventing the system from functioning properly. Is there anything we can do to address this? Today, the editor will discuss this issue with you. First, we need to identify the reasons behind the excessively high input voltage, so as to prevent and resolve the problem. Let’s take a look at what exactly causes it. There are three reasons for an excessively high input voltage: the output terminal being open or having no load ； The load at the output is too light, less than 10% of the rated load ； The input voltage is too high or there is interference voltage. So, how should we address this situation? It can be done by adjusting the load at the output or by adjusting the input voltage range. How? Ensure that the load at the output is not less than 90% of the rated load; if no-load conditions occur during actual circuit operation, connect a dummy load with a rated power of 10% in parallel at the output. By changing the input voltage to a reasonable range, and when there is interference voltage, it is necessary to consider connecting a TVS diode or a voltage regulator at the input terminal.
Since it’s too high, then choose a more appropriate one. It’s a bit too high; some technical measures can be taken to address it. If it’s excessively high, such issues should have been detected during the initial selection, procurement, and acceptance process. Why wait until the site to try to solve them?