About MOSFET has always been one of the topics that engineers of circuit design are keen to discuss, and manufacturers want to see how to Choose New Mosfet to Improve PCB Performance. In actual work, when encountering various electrical equipment, damaged electronic components should be replaced with the same type of components, and this is occasionally happens in the process of reverse engineering circuit board from years ago which has phased out from the market or stop the production for years. Sometimes, if you don’t have the same components or want to upgrade your product’s performance, you will also replace other MOSFET to improve efficiency.
However, this should take into account all aspects of performance, parameters, dimensions, etc., such as the line output tube inside the TV, as long as the withstand voltage, current, power can be replaced (line output tube appearance size is almost the same ), and the power is often the bigger the better.
Although the MOSFET replacement should also follow the same principle, the best is the original model, especially not to pursue high power, because the higher input capacitance, the larger is power, and the excitation circuit aren’t matched with the replacement, and the charging limit of the excitation perfusion circuit is The resistance value of the current resistance will be related to the input capacitance of the MOSFET transistor.
Although the power is large with the capacitance, so as the input capacitance, as a result of that, excitation circuit cannot be fully matched, on the contrary, the performance of MOSFET switch functionality will be deteriorating. Therefore, to replace different types of MOSFET, take into account the parameters of their input capacitance is very necessary.
