Causes of Mosfet Overheating and How to Overcome It
Metal Oxide Semiconductor Field Effect Transistor (MOSFET) is a semiconductor device that functions as a signal amplifier and switch in an electronic device. In cars, this MOSFET is usually embedded in the power amplifier section. However, in reality, the MOSFET can heat up at any time. So what causes the MOSFET to heat up quickly? How can this problem be addressed? For more details, please pay attention to the following explanation.
Causes of MOSFET Overheating
As a transistor used in various types of electronic device circuits, the MOSFET automatically receives a very large electric current. The large amount of electric current it receives is what causes the temperature of the MOSFET to fluctuate easily. Sometimes the temperature of the MOSFET becomes so hot that it can reach seventy degrees Celsius. If the temperature of the MOSFET exceeds this maximum temperature, it is certain that the MOSFET will be damaged. As a result, the power amplifier will not function properly, or even shut down.
All transistors embedded in all electronic devices will always have high and hot temperatures when in operation. However, if a transistor burns out while working, it means there is a problem with the electronic device system. The causes of these problems include the following.
1. Short Circuit
As is known, the MOSFET is a semiconductor device closely related to the electrical system. Meanwhile, a common problem in electrical systems is short circuits. If a short circuit occurs in the aluminum cooling part with the MOSFET power body, it is certain that the MOSFET will overheat and be damaged.
2. Excess Base Current
When the MOSFET receives too large a base current, the potential for the MOSFET to experience a significant temperature increase is very high. In fact, the MOSFET can burn out and be damaged.
3. Load Not Appropriate
Like other electrical components, the MOSFET also has its own load capacity. If the power received by the MOSFET is too high, the temperature of the MOSFET will easily rise. As a result, the MOSFET will burn out, causing problems with the power amplifier.
4. Power Voltage Too High
The last cause of the MOSFET overheating is due to the power voltage exceeding the MOSFET's voltage capacity.
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How to Address Overheating MOSFET
There are several ways you can take to prevent significant temperature increases in the MOSFET. Here are the complete methods.
1. Install a Rib Plate
The first way you can prevent the MOSFET from overheating is by installing a rib plate on the MOSFET. This method is very effective in dissipating heat from the MOSFET.
2. Install a Cooling Plate
The second way is to install a cooling plate on the MOSFET body so that the heat from the MOSFET can be transferred to the cooling plate.
3. Connect the Emitter Leg
To prevent the MOSFET from overheating, you can also connect the emitter leg to the junction capacitor. This way, the power received by the MOSFET will not exceed its capacity to handle power.
These are the methods you can apply when the MOSFET in your car's power amplifier gets hot. If you are not confident in handling this issue on your own, you can consult a nearby professional workshop such as a Daihatsu workshop. Here, not only can the overheating MOSFET issue be resolved, but other car-related problems can also be effectively addressed.
At the Daihatsu workshop, you will receive the best service from professional mechanics. In addition, the workshop equipment used is also very modern and of international standards, making the car repair process very accurate and fast. Whatever your car problem is, the Daihatsu workshop is the solution.
