Electrical stable is a very important thing for any electronic device, in particular a computer which necessarily contains a variety of components precision electronic and requires high stability. We definitely know the term well or stabilizer usual box-shaped red which is used to stabilize the electric current on the equipment in the house. While on the computer, the process of change and the regulation of electricity is carried out by a unit called a PSU or Power Supply Unit. PSU tasked change 220v AC electric are supplied by PLN into DC power with a wide range of voltage (usually 3.3 V , 5V and 12V) is needed of the various components in your computer.But, the thing is, the important components of the computer such as the processor and the graphic card requires great power but with a small voltage. Processor AMD FX modern example, using the range working voltage between 0.8 v and 1.2 v depending on the load and the working frequency that is being used. Then to change the voltage of electricity from 12V supplied PSU be working voltage of the processor, should the DC-to-DC Converter, or it could be diebut with a “Buck Converter”
VRM (Voltage Regulator Module) or there is some mention the term Processor Power Module (PPM) is the union of some components of the electronic charge of changing the voltage of 5V and 12V from the PSU into the required voltage processor, vga, chipset and ram to work optimally. In addition to transforming voltage, VRM also perform the function of voltage regulation. Voltage regulation is ensuring that the obtained value of the voltage that is always stable and precise regardless of the load that is being given. It is very important to ensure the stability of the system, especially if suddenly processor is given a load that requires the load to reach the maximum capacity so it does not happen voltage drop (Voltage drop) that can destabilize or even damage the components connected to the rail voltage is given.
Constituent components VRM
MOSFET : Metal Oxide Semicondutor Field Effect Transistor or abbreviated MOSFET is the active component in the form of transistors dedicated to convert the voltage to 12V from the PSU into a voltage that is needed. Component MOSFET this is a component of the VRM that is the most hard-working and generate heat, which most result of the conversion task it does. Many motherboards have damage on the VRM occurs because the components of the MOSFETS is damaged, whether due to overload due to the division of tasks is less due to the number of mosfets that a lot less, overheat, or the quality is less good.
Filtering through the Capacitor and Choke : Capacitors and Choke on the VRM duty is to perform signal filtering-the unwanted signal on the distribution line voltage as well as voltage stabilizer issued from the VRM. On the VRM, it takes the capacitor of good quality because of this component often gets a heavy workload. Not infrequently encountered capacitors electrolytic leaking or bulging due to the strong withstand loads of work done VRM, therefore, most motherboards quality using solid capacitor-based polymer to avoid this.
PWM Control IC. The entire work VRM set of signal PWM ( Pulse-Width-Modulation) issued by the ic that are specifically organize the work of the VRM and monitoring or sensing the voltage on the input and output of the VRM. This IC will actively do the correction voltage by sending a signal with the length of the pulse that is adapted to different electrical conditions and workload components that are powered by VRM.
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