Power Supply

ejaccion wrote:

mag katulad ba ng power supply ang computer at laptop o battery lng ung sa laptop di tulad sa computer?

The AC Adapter, a power supply and a charger in reference to a laptop computer: all three functions are handled by the device's external power device. With laptops, all three names refer to the same device that's commonly referred to as a "power brick." There are other devices that individually serve as internal power supplies, external power supplies and battery chargers; however, all laptop power units provide both power and charging functions from an external source.

While in Desktop Computer, a power supply or PSU is a device or component that takes energy from an Alternating Current electricity source and converts it into usable Direct Current for another electronic device. The power supply also makes sure that the computer doesn't receive too much or too little electricity, which could cause the system to fail or break. The term "power supply" is typically associated with desktop computers and refers to a component braced to and housed inside the computer case. Internal power supplies are rectangular or cubed shape and run several inches in all directions; they usually have built-in fan cooling units that expel hot air from the rear side of the computer case.

Any questions regarding of these, ejaccion? Kindly reply or pm me here!

Facts: power supply converts AC current to DC current

How to protect the power supply against over voltages or surge voltages?

How to test power supply?
Shut down your computer. ...
Open your computer case. ...
Make a paper clip tester. ...
Find the 20/24 Pin connector that normally attaches to your computer's motherboard. ...
Find the green pin and a black pin (pins 15 & 16). ...
Insert the paperclip.
Check the fan.

mlskjames wrote:

ano yung linear voltage regulator ?

To understand how linear regulators work, imagine that the output voltage is the level of water in a tank and the output current is a leakage. To maintain the level in the tank, the same flux of water must enter the tank as the one that is leaking. To control the influx, we have two options: either strangle the influx to match the leakage or divert any influx that may be exceeding the leakage to another path.

Linear regulators are a great choice for powering very low powered devices or applications where the difference between the input and output is small. Even though they are easy to use, simple and cheap, a linear regulator is normally inefficient.

The equation for dissipated power in a linear regulator is:
Power dissipation = (input voltage – output voltage) × load current

Ryan Joshua Verano wrote:

Pano ko po itetest ang power supply ko kung working siya

Testing a power supply manually with a multimeter is one of two ways to test a power supply in a computer.

A properly executed PSU test using a multimeter should confirm that the power supply is in good working order or if it should be replaced.

Note: These instructions apply to a standard ATX power supply. Almost all modern consumer power supplies are ATX power supplies.

Open your case. In short, this involves turning off the computer, removing the power cable, and unplugging anything else connected to the outside of your computer.

Group all of the power cables and connectors together for easy testing.
As you're organizing the power cables, we highly recommend rerouting them and pulling them as far away from the computer case as possible. This will make it as easy as possible to test the power supply connections.
Short out pins 15 and 16 on the 24-pin motherboard power connector with a small piece of wire.
You'll probably need to take a look at the ATX 24-pin 12V Power Supply Pinout table to determine the locations of these two pins.

Confirm that the power supply voltage switch located on the power supply is properly set for your country.
Note: In the US, the voltage should be set to 110V/115V. Check the Foreign Electricity Guide for voltage settings in other countries.
Plug the PSU into a live outlet and flip the switch on the back of the power supply. Assuming that the power supply is at least minimally functional and that you've properly shorted the pins in Step 5, you should hear the fan begin to run.
Important: Just because the fan is running does not mean that your power supply is supplying power to your devices properly. You'll need to continue testing to confirm that.
Note: Some power supplies do not have a switch on the back of the unit. If the PSU you're testing does not, the fan should begin to run immediately after plugging the unit into the wall.

Turn on your multimeter and turn the dial to the VDC (Volts DC) setting.
Note: If the multimeter you're using does not have an auto-ranging feature, set the range to 10.00V.
First, we'll test the 24-pin motherboard power connector:

Connect the negative probe on the multimeter (black) to any ground wired pin and connect the positive probe (red) to the first power line you want to test. The 24-pin main power connector has +3.3 VDC, +5 VDC, -5 VDC (optional), +12 VDC, and -12 VDC lines across multiple pins.

You'll need to reference the ATX 24-pin 12V Power Supply Pinout for the locations of these pins.
I recommend testing every pin on the 24-pin connector that carries a voltage. This will confirm that each line is supplying the proper voltage and that each pin is properly terminated.
Document the number that the multimeter shows for each voltage tested and confirm that the reported voltage is within approved tolerance. You can reference Power Supply Voltage Tolerances for a list of proper ranges for each voltage.

Turn off the switch on the back of the power supply and unplug it from the wall.
Reconnect all of your internal devices to power. Also, don't forget to remove the short you created in Step 5 before plugging back in the 24-pin motherboard power connector.

Plug in your power supply, flip the switch on the back if you have one, and then turn on your computer as you normally do with the power switch on the front of the PC.

Once your testing is complete, turn off and unplug the PC and then put the cover back on the case.
Assuming your power supply tested good or you've replaced your power supply with a new one, you can now turn your computer back on and/or continue troubleshooting the problem you are having.

"1.5 × PSU watts + Other components" Formula para malaman mo ang kailangan mong wattage sa supply mo

Possible po bang masira yung computer kapag una ko po isara o iturn off yung power supply kahit naka bukas pa yung computer?

A power supply is a hardware component that supplies power to an electrical device. It receives power from an electrical outlet and converts the current from AC (alternating current) to DC (direct current), which is what the computer requires. It also regulates the voltage to an adequate amount, which allows the computer to run smoothly without overheating. The power supply an integral part of any computer and must function correctly for the rest of the components to work.

You can locate the power supply on a system unit by simply finding the input where the power cord is plugged in. Without opening your computer, this is typically the only part of the power supply you will see. If you were to remove the power supply, it would look like a metal box with a fan inside and some cables attached to it. Of course, you should never have to remove the power supply, so it's best to leave it in the case.

While most computers have internal power supplies, many electronic devices use external ones. For example, some monitors and external hard drives have power supplies that reside outside the main unit. These power supplies are connected directly to the cable that plugs into the wall. They often include another cable that connects the device to the power supply. Some power supplies, often called "AC adaptors," are connected directly to the plug (which can make them difficult to plug in where space is limited). Both of these designs allow the main device to be smaller or sleeker by moving the power supply outside the unit.

Since the power supply is the first place an electronic device receives electricity, it is also the most vulnerable to power surges and spikes. Therefore, power supplies are designed to handle fluctuations in electrical current and still provide a regulated or consistent power output. Some include fuses that will blow if the surge is too great, protecting the rest of the equipment. After all, it is much cheaper to replace a power supply than an entire computer. Still, it is wise to connect all electronics to a surge protector or UPS to keep them from being damaged by electrical surges.

What is a power converter?

How to provide Over current protection in a power supply?

How to protect power supply against applying reverse voltage?

casison wrote:

What is a power converter?

What is a power converter?
A power converter is an essential hardware component required in every piece of electrical equipment. The task of the component is to convert the relatively high voltage alternating current from the mains supply into stable low voltage direct current which is required by all electronic equipment. The power converter is also a safety critical component in any system as it protects the user of the equipment from the potentially lethal mains supply.

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casison wrote:

How to provide Over current protection in a power supply?

How to provide Over current protection in a power supply?
Using Fuse we can protect the power supply against over current.
We have to insert the fuse in the phase line.

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How to protect the power supply against over voltages or surge voltages?

casison wrote:

How to protect power supply against applying reverse voltage?

By including diode in the phase line we can protect the circuit against applying reverse voltage.
If we use schottky diode we can reduce power dissipation across the diode as the power dissipation = Vf x I

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casison wrote:

How to protect the power supply against over voltages or surge voltages?

By using MOV (Metal Oxide Varistor) we can suppress the surge voltages.
The MOV is connected across the phase and neutral lines.

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What is a power supply?

Where is the power supply located in a computer?

What items are powered by the computer PSU?

How to install a computer power supply?

If one have a bad power supply, should repair it or replace it?

adicuasay wrote:

What is a power supply?

PS, P/S, or PSU are abbreviations for power supply or power supply unit. A power supply is a hardware component of a computer that supplies all components in a computer with power. The power supply converts a 110-115 or 220-230 volt AC (alternating current) into a steady low-voltage DC (direct current) usable by the computer and rated by the number of watts it generates. For example, the image to the right is an Antec True 330, a 330 Watt power supply.

adicuasay wrote:

Where is the power supply located in a computer?

In most computers, the power supply is located at the back of the computer. In a tower computer case, the power supply is usually located at the top back or bottom back of the case. In a desktop computer case, the power supply is located at the back left or back right of the case.

adicuasay wrote:

What items are powered by the computer PSU?

Everything contained in the computer chassis is powered by the power supply. For example, the motherboard, RAM, CPU, hard drive, and disc drive are all drawing power from the power supply. Some higher end video cards draw power directly from the power supply as well. Any other external devices and peripherals, such as the computer monitor and printer, have their own power source.