The power adapter of the notebook will generally get very hot during work, but if it gets hot or the adapter case is protruding, it is an abnormal condition; 

1. The high fever of the adapter is caused by two factors;
1. The adapter has poor heat dissipation, or the shortcomings of the design scheme cause high heat;
In this type of situation, the adapter can generally be modified with a radiator or a cooling fan can be used to reduce the temperature. The actual effect is still very good;
2. The load of the adapter (such as the built-in DC/DC conversion power supply circuit, high-voltage board power supply circuit, backlight power supply circuit) has poor characteristics, or a certain component is damaged or invalid;
Among the above power supply circuits, the most common fault is the output power regulator tube and its coupling capacitor;

This kind of spare parts may cause the amount of failure current (such as the amount of running current) to increase sharply, thereby reducing the loss of the adapter. The output power is high in efficiency. The adapter is forced to output a large amount of rated power to meet the rated power requirements of the entire machine, so it has a high fever. The situation happened.  

Second, the reason why the power adapter is hot
First, you don’t have to guess what’s wrong with your switching power supply. First, see what your laptop is doing. Whether it’s like the two USB computer hard disks mentioned above, the CPU is running fast, the computer hard disk has crazy reading and writing capabilities, and the computer CD-ROM drive is fast reading. It’s important to use battery management flexibly and effectively adjust the running status of the notebook according to daily tasks. br /> Second, the adapter has poor heat dissipation, or the design solution is short of heat; this type of situation can generally be treated by refitting the adapter with a radiator or using a cooling fan to reduce the temperature. The actual effect is very good;
Third, the load of the adapter (such as the built-in DC/DC conversion power supply circuit, high-voltage board power supply circuit, backlight power supply circuit) has poor characteristics, or a certain component is damaged or invalid;

Fourth, the output power regulator tube and its coupling capacitor parts may cause the failure current (such as the running current) to increase sharply, thereby reducing the loss of the adapter. The output power is highly efficient, and the adapter is forced to output a large amount of rated power. , In order to meet the rated power requirements of the entire machine, so a high fever condition occurred.  

Three, five ways to deal with hot power adapter
First: Create an excellent natural environment for heat dissipation, and place the power adapter in a ventilated place that will not be exposed to sunlight. Remember not to use it for too long under high temperature. If you must use it for a long time, you must pay attention to heat dissipation. The cooling fan can be placed aside to assist in heat dissipation.
Second: In a high-temperature natural environment, placing the adapter on its side to reduce the contact with the total area of ​​the road can allow the adapter to release more heat, which has a practical effect of heat dissipation.
Third: A narrow plastic block or metal material block can be placed between the adapter and the desktop, which can accelerate the release of heat generated by the adapter.
Fourth: The hotness of the power adapter is generally caused by the battery charging and the consumption of the computer. We can set it in a notebook with battery management system software.
Fifth: often use dry thin cloth or toilet paper to scrub the dust on the surface of the power adapter to prevent dust from entering the gap and reduce the heat dissipation characteristics.
Fourth, there is another situation that many people often encounter, that is, the nominal voltage of the switching power supply is much higher than the working voltage of the laptop battery. Is it not easy to cause the laptop to be destroyed?
In fact, the switching power supply for laptops is different from the battery for laptops. First, battery power is mentioned. The output of the battery is pure DC. It is enough to connect the DC transformer control module immediately. The working voltage of the battery is unlikely. There is no need to design a plan very high. The working voltage requirements of pulse signals and analog signals in microelectronic circuits are mostly bounded by 9V at this stage, eliminating the high efficiency and pressure difference requirements of the DC transformer control module, 10.8V is sufficient, and the organic chemical induction electromotive force of the lithium battery is determined The output voltage of a lithium battery cell is only around 3.6V, so many batteries all use the three-stage series connection method, and 10.8V becomes a very fashionable battery operating voltage.
Some batteries have a tolerance value that is slightly larger than the non-negative integer of 3.6V, such as 3.7V or 11.2V, which is actually for better battery maintenance (very few manufacturers will interrupt the battery charge and discharge operating voltage Include 3.7V) or opportunistic personal behavior under the condition of estimated battery design plan volume. If the switching power supply is used for power supply, the situation will be more complicated. First, the added working voltage must be further filtered by the regulator tube to ensure stable operation under the condition that the switching power supply characteristic is not very good. The working voltage after the regulator tube is divided. Two ways, one way supplies power to the notebook computer while the other way charges the battery battery, the part that supplies power to the notebook computer suffers the same as the case of battery power supply, and the part that charges the battery battery must be controlled according to the battery charge of the battery The circuit can be added to the lithium battery, and the control circuit can be very complicated. 12V power adapter

In short, it should include junior and intermediate voltage regulators, high-precision auto-tunable voltage regulators, thyristors to adjust pulsating beverage output, voltage regulator output, current flow feedback, integrated IC battery charging full process recording and calculation, battery charging program flow automatic The main parameters of the feedback function are these, so the power supply voltage must exceed the working voltage of the lithium battery to have sufficient pressure difference capacity to supply each module of the battery charging control loop. In the end, the working voltage that is really added to the lithium battery cell will never be 16V, so please worry about it.  

In fact, only the temperature of the power adapter is within the scope of the design scheme. In other words, the temperature is within the scope of all normal. Generally, it is not easy to be risky. Therefore, when designing the production and manufacturing of the switching power supply circuit, it must be Choose heat-resistant electronic devices. Naturally, the temperature of the switching power supply must be controlled within the scope allowed by the application scenario. First, we must make the conversion high-efficiency design plan as high as possible, and secondly, use power switch electronics with low loss and low loss. Third, we must develop a heat dissipation design plan, and the total heat dissipation area must be as large as possible, above 100W. The switching power supply circuit should generally have a metal shell with holes, or add a cooling fan. At this stage, the output power of the laptop power adapter is generally around 60 or 70 W, and the fire-resistant, high-temperature and high-temperature plastic sealing package is selected, and the heat generated inside is released according to the transmission of the plastic case. Therefore, the external temperature of the power adapter may be very high, and the maximum temperature will even reach 70 degrees. Therefore, when using laptops, everyone should place the power adapter in an area with good natural ventilation and heat dissipation as much as possible. Do not place objects such as books on the switching power supply.