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The difference between switching power supply and power adapter
time2006/11/02
- The power adapter is converted from AC to DC, and then through the computer, it can not protect the computer, so it can protect the computer during the power outage.
1, characteristics:
The characteristics of the power adapter are: the power converter (AC to DC), from AC to DC, and then through the computer, it can not protect the computer, but there is a storage device (also called charger) in the computer, so Protect your computer in the event of a power outage.
The characteristics of the switching power supply are: high-speed switching and cut-off with the circuit-controlled switching tube. The direct current is converted into high-frequency alternating current and supplied to the transformer for voltage transformation, and then one or more sets of voltages are required to be generated! The reason for the frequency AC is that the power of the high-frequency AC in the transformer transformer circuit is much higher than that of the 50HZ. Therefore, the switching transformer can be made very small, and the operation is not very hot!! The cost is very low. If the 50HZ is not changed to high Frequency switching power supply does not make sense.
Both the switching power supply and the adapter are switching power supplies, which are composed of a high frequency switching tube and its control circuit. The power adapter is a regulated switching power supply, and the switching power supply has a floating charging function. The voltage becomes larger as the current becomes smaller, as long as the voltage has no current.
2, the difference:
Switching power supplies are a large class. The power adapter is attributed to the switching power supply.
3. Working principle:
In reality, most of the power adapters we are exposed to are switching power supplies. Switching power supply refers to a kind of power supply that controls the output voltage of the switch through modern electronic technology, and the switching power supply of the power adapter is generally composed of a pulse width modulation (PWM) control IC and a MOSFET. Advantages: High conversion power, small size, and ability to operate over a wide voltage range.