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Several protection features of power adapter

source:power adapter     Popular:adapter     release time:2021-08-14 09:24:47     Article author:sznbone    

  When the power adapter is produced, safety protection is required. This is inevitable. The following power adapter manufacturers will describe in detail several protection features of the power adapter.

Several protection features of power adapter(图1)

  Overvoltage protection

  In the case of damage to the loop, such as the optical coupler damage or the TL431 voltage divider network is affected, the power adapter must stop working immediately and remain in this state before the user restarts the adapter.

  Short circuit protection

  must be able to withstand a continuous short circuit of the output without damage. When the fault disappears, the adapter must be able to recover from the protection mode and provide rated power again.

  Over temperature protection

  If the temperature of the power adapter exceeds a certain temperature value, there is a risk of damage to the adapter. In order to avoid this situation, it is necessary to use a thermal sensor to continuously monitor the temperature, and when the temperature exceeds the limit set by the designer, the adapter is continuously turned off. When the user restarts the power supply and the temperature drops, the power adapter resets.

  Over power protection

  For some power supplies, it is important that under the worst conditions-such as excessive current consumed by the load, the maximum output current is kept under control without actual short circuit.


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