CAPACITOR AND ITS FUNCTIONS IN MOTHERBOARD LAPTOP

Capacitor is a component that can store energy in the electric field,

by collecting the internal imbalance of the electrical charge. Has

two legs, positive and negative (Polar).

While the other types have no positive or negative poles (Bipolar)

The

units used are:

1 Farad = 1,000,000 μF (Farad micro)

1 μF = 1,000,000 pF (piko Farad)

1 μF = 1,000 nF (nano Farad)

1 nF = 1.000 pF (pico Farad)

1 pF = 1,000 μμF (Microsystem Farad)

Inside the Laptop The motherboard will be found Polar and Bipolar

capacitors, the type used is SMD (shaped plot) and Polymer

(tubular)) functions to meperbesar (pf) Installed in parallel with the

load circuit. When the circuit is given voltage then the electrons will

flow into the capacitor. When the capacitor is full of electron

charge, the voltage will change. Then the electron goes out of the

capacitor and flows into the circuit that needs it. Thus at that

moment the capacitor generates reactive power. When the

changed voltage returns to normal (fixed) then the capacitor will

save the electron back.

The stored charge is what can anticipate the power spike (voltage

spikes) that often occur on Power processor and Power Chip.









Capacitors also function as a Signal Generator (frequency) where

in the series of motherboard laptops there are dozens of switching

transistors need signal gate driver in order to pass the voltage.

Capacitor can also be used as a measuring point on the positive

pole on each circuit of each Voltage Rail. If it is on the VALW circuit,

then each capacitor in this circuit will have a load Voltage exceeds

the adapter load. Usually maximal 25V. While in the circuit 5V and

3V dc / dc The system maximal voltage allowed only 6.3V because

the voltage through this circuit is only 3 and 5V. So also with the

VCCORE and VCCP circuit because this circuit is only passed byvoltage 1 s / d 1.5V then the load value of capasitor is only 2.5V.

Capacitor load values can also be used as reference in the use of

PSU, by looking at the maximal load capacitor in the circuit that the

benchmark value of injection voltage may injectable.

Example on the VALW 19V line,

Every capacitor in this circuit must have a load of more than 19V

(generally 25-50V) Another example on 3V and 5V lines then the

maximal load capacitor must be more than 5V. usually used 6.3V

In the signal circuit sometimes we do not have a reference how

The exact voltage in the circuit. By identifying the load value of the

capacitor in the circuit then we already know how much the

maximal voltage will be injected on that path.

Capacitor is the biggest cause of feedback in Short case, leakage

on capacitor can unite positive pole and negative cover, little

physical damage to capacitor then leak will happen. How to

measure capacitor short in circuit with buzzer of both legs if

connected then short cause capacitor is in the circuit.

Polar Capacitors are those that have positive and negative poles,

usually on the physical sign of + or white / black strips as positive

polar references. The installation of this capacitor should not be

inverted, as well as the polymer capacitor they also have two poles

and the installation should not be inverted.

Bipolar Capacitors do not have poles, if mounted upside down is

not a problem, but in the circuit is fixed to the positive and negative

poles. To know which line is negative buzer to ground if sallah one

buzer then that is negative pole in circuit. Usually on physical sign

+ + or white / black strip as a reference pole positive. The

installation of this capacitor should not be inverted, as well as the

polymer capacitor they also have two poles and the installation

should not be inverted. Bipolar Capacitors do not have poles, if

mounted upside down is not a problem, but in the circuit is fixed to

the positive and negative poles. To know which line is negative

buzer to ground if sallah one buzer then that is negative pole in

circuit. Usually on physical sign + + or white / black strip as a

reference pole positive. The installation of this capacitor should not

be inverted, as well as the polymer capacitor they also have two

poles and the installation should not be inverted. Bipolar Capacitors

do not have poles, if mounted upside down is not a problem, but in

the circuit is fixed to the positive and negative poles. To know which

line is negative buzer to ground if sallah one buzer then that is

negative pole in circuit.