source:power adapter Popular:adapter release time:2021-11-03 09:59:28 Article author:sznbone
Judging from the usage of most users, the laptop will be under light load or standby conditions for a considerable period of time. Compared with improving energy efficiency under 25%, 50%, 75% or 100% load conditions, reducing energy consumption and improving energy efficiency under extremely low load conditions or even standby conditions are more challenging. So what are the required performance of the notebook power adapter?
1. Short circuit protection (SCP)
It 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.
2. Overvoltage protection (OVP)
In the case of damage to the loop, such as the damage of the optocoupler or the influence of the TL431 voltage divider network, the power adapter must stop working immediately and remain in this state before the user restarts the adapter.
3. Over temperature protection (OTP)
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.
4. Over power protection (OPP)
For some power supplies, it is important to maintain the maximum output current in a controlled state under the worst conditions, such as excessive current consumed by the load, without actual short circuit.
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