With the continuous development and progress of science and technology, the demand for power adapters for the application practice of various research projects is increasing year by year. Especially if you go to other countries, where the voltage is different from ours, then the role of the power adapter becomes crucial. So, what types of power adapters are available?
Here is the content list:
Types of power adapters
How to service the power adapter
Types of power adapters
Power adapters are mainly divided into these two types, switching power adapter and linear power adapter.
1. A switching power adapter is a power supply that uses modern electronic technology to control the time ratio of the switch to maintain a stable output voltage.
Advantages: high efficiency, small size, can work in a wide voltage range.
2. Linear power adapter is the AC power through the transformer, rectifier circuit rectification filter to get unstable DC voltage, power adapter to achieve high precision DC voltage, must be adjusted after the voltage feedback circuit output voltage.
Advantages: This power adapter technology is mature, the circuit is simple, and no switching power supply has interference and noise.
Line failure, including power line damage, does not energize, contact port oxidation poor contact, and other conditions. Focus on checking whether the input line and output line of the power adapter is energized. If it is determined to be a line fault, it can be solved by replacing the power cord of the power adapter, etc.
2. The output voltage of the power adapter is too low
Switching power adapter load short-circuit fault, at this time, first disconnect all the loads of the switching power adapter circuit, check whether the switching power adapter is a circuit failure or load circuit has a fault. If the load circuit is disconnected and the voltage output is normal, it means that the load is too heavy; or still, not normal means that the circuit of the switching power adapter is faulty.
3. The output voltage of the power adapter is too high
The output voltage of the power adapter is generally too high from the voltage regulator sampling and voltage regulator control circuit. In the DC output, sampling resistors, error sampling amplifiers such as optocouplers, power control chips, and other circuits together constitute a closed control loop, any one of the parts of the problem will cause the power adapter's output voltage to rise.
4. The fuse of the power adapter is normal, no output voltage
If the fuse of the power adapter is normal and the dans have no output voltage, it means that the switching power adapter is not working or has entered the protection state. Then you need to check the start-up voltage value of the power adapter control chip. If no start-up voltage is displayed or if it shows that the start-up voltage is too low, you should check the external components of the start-up pin and the start-up resistor for leakage.
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