A high side FET driver… heard of it? It might sound like a lot to take in, but it is an incredibly necessary part of electronics that we use almost every day. In this blog, we will spend some time to learn about what a high side FET driver is, why it matters in our devices and how we can utilise one efficiently into different applications.
So, a high side FET driver is an special kind of circuit made specifically to drive this type of fets. Which applies an analog signal, or voltage to the FET Gate. This is the signal which tells FET when to allow current pass through. The high-side FET driver is situated on the "high" side of the circuit because it connects to positive voltage from some power source. Because this one is connected to the + side of circuit, lowside fet driver on negative site. One of the reasons it is important to know about these two kinds of drivers, is because they both work in different ways accordingly.
Then, why are high voltage FET drivers important to electronics? They are widely used in switching power supplies, which represent a large fraction of mass-produced mains-poweredfathered acreage. These are specific type of circuit which converts one voltage level to another voltage level. This is often required to give enough juice to electronic devices that require a certain level of power in order for them more function correctly.
The high side FET driver used in a switching power supply adjusts how much electricity can flow through the FET. As the FET is either turned on or off at specific intervals, you reduce/increase voltage coming for step down/step up output needed from a device. This procedure is very important to avoid his our devices working as expected and efficiency.
This method, called synchronous rectification, is one of the ways to increase efficiency in a circuit. “ With this process, the high side FET driver work with another FET on low side of circuit. When the high side FET driver turns on, it also turn this second FET at the same time. This will allow electricity to go back into the power supply, leading to a lower amount of energy wasted as heat. This helps in enhancement of power supply performance for better effectiveness.
In order to avoid this type of hazardous situation, the engineers and designer use extra circuits which guaranteed that at a time either low side or high name FETs should never be on concurrently. They could introduce a slight delay when switching one FET off and the other on, or use specialty parts such as gate driver ICs which offer additional shielding from this kind of abuse. The precautions are necessary to protect the circuits and make them work properly.
Thus, in which real-world electronics can you locate such high side FET drivers? They can be found in a multitude of places, but you may come across them often with LED lighting (ex. LED lights have a specific voltage and current that needs to enable, however high side FET drivers are very useful in controlling this electricity. That way the for leds receive exactly as much power they need to shine bright but do not burn out.
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