Home > Power Supply > Power Supply Amp Ratings

Power Supply Amp Ratings

Contents

As such, the power being delivered to the load is also changing very rapidly! The rating on the power cord is just a max voltage rating because in other countries they may have power rated at 250V. The current rating of a supply is what it can deliver, not what it will always force thru the load somehow. It's helps but it's not a perfect system. http://macland.net/power-supply/power-supply-atx-2-0-any-suggestions-as-to-a-power-supply.php

If you have a universal adapter, make sure it has the proper current rating and that you choose the correct voltage and polarity. The risk of damage to the speakers depends on the characteristic of the music (does it have lots of high frequency energy to begin with?), to what degree of clipping is I have a lot of extra 12v adapters,if you know the tip size and polarity, I could send you one for about $10 Reply doh May 13, 2016 at 3:07 pm Back in the 1960's and early 1970's, there were no standardized conventions for stating power ratings of amplifiers. http://electronics.stackexchange.com/questions/34745/choosing-power-supply-how-to-get-the-voltage-and-current-ratings

Can I Use A Power Supply With Higher Amps

Ideally, you’ll have the same voltage, current, and polarity on your adapter and device. Are helicopters aerodynamically stable? i was hoping to find a replacement of my Jbl on stage III power supply adapter and i dont know which is which. SharePoint online extranet How did I end up with this FizzBuzz?

see more linked questions… Related 8Ripple current in a linear power supply transformer-1Using a pc power supply, any risk to electronics?3Difference between voltage and current ratings on a component8Why can't a Music Power: This is a term from the "old days". Most amps do better at mid frequencies with regard to maximum power output. Can I Use A 12v Power Supply On A 9v by MyLittleMansAnIdiot · 10 years ago In reply to power supply amp rating ..connecting a PSU to anything that's not the correct rating.There are 2 different types of power supplies, regulated

Voltages? Power Supply Amperage Too Low The RMS voltage of the signal in Figure 7 is now 12.14 volts and the RMS power is 18.4 watts. The crest factor (power) is now approximately 7.35 dB (note that Thanks for straightening me out g048989hSep 24, 2010, 2:18 PM Best answer selected by g048989h. https://www.carlingtech.com/amp-hp-volts This section goes into more power supply details that generally don't matter at the consumer level, and it assumes some basic understanding of electronics.

This is where we bring the term "RMS" into play. Supply Current Formula Although not mentioned, it is likely that the frequency limits given represent the "half power" points. Reply mirocromiro November 19, 2016 at 4:12 am # thanks man you saved my life! This amp can do 110 watts per channel continuous RMS at 4 ohms; recall (from above explanations) that the peak power for an amp is twice its RMS rating; so, 220

  1. What does CWOP mean on visa cancelled stamp?
  2. Reply EmilN February 25, 2016 at 1:25 am # @MikeM "-DC Output: 19V 12.2A 230W -DC Output: 19.5V 11.8A 230W " - Yes, they are likely interchangeable even though voltage is
  3. It's potential is always the same relative to ground, and it's polarity is either positive or negative.
  4. Basically, to arrive at this spec two sine wave signals are applied to the amplifier input.
  5. This signal, when applied to a speaker, of course generates sound, but it also generates heat in the speaker's voice coil.

Power Supply Amperage Too Low

Take what a device says on its nameplate seriously and don't give it more voltage than that. That adapter would have been fine. Can I Use A Power Supply With Higher Amps In our case we have a 40 volt DC signal, so the sine wave signal necessary to deliver the same power in the load must have a peak value of 40 Power Supply Amperage Too High For example, an amplifier that is used in a home stereo may have a rating of 100 watts per channel.

Be aware that watts are watts, there is technically no such thing as watts RMS. this contact form A 100 mA wall wart may overheat and set your house on fire if not properly protected. However, your DC input will be toast. This second fact can be deduced by looking at the equation P=V2/R . Power Supply Current Rating

However, I'd go with the 90 Watt supply, since it is more power than the original could possibly supply; kinda like switching from your normal boat-towing car to a pickup truck. Thanks! It turned on the first time. have a peek here High Inrush loads draw a higher amount of current or amperage when first turned on, compared to the amount of current required to continue running.

If it's stated 5V, you are not in trouble , because you can use the USB cable to charge your phone by the powerbank's port. Car Amp Power Supply OEM Specs: Battery: +10.8V 5200mAh, 56W Laptop: +19V 3.42A, 65W Reply Carpenter940 May 4, 2016 at 1:13 pm # Match to laptop. This must match what the device expects, or it could damage the device.

All of Carling Technologies' AC voltage ratings are listed at 50/60Hz, and all Carling Technologies' agency approved switches will list specific AC voltage ratings.

The voltage rating is a function of a switch's ability to suppress the internal arc that occurs when a switch's contacts open. Both lower and higher could be bad. As should be fairly obvious, this can lead to premature failure of the midrange and/or tweeter. Computer Power Supply Amps The 5W of the output 1 is less and the phone will take some time to full up the battery.

So, most amps will put out at least 10% more power than their actual ratings. Higher than specified voltage is definitely bad. Reply Steve Krause March 31, 2016 at 9:01 am # Milliamperes. http://macland.net/power-supply/power-flashes-when-i-flip-the-power-supply-switch.php This is a pretty important spec.

What is the significance of that, if any? These are generally noted on the PSU by a "squiggle" (or a syne wave) for AC and an equals sign with the top line broken for DC. It really depends which way the "C" is facing. It is the harmonics that cause the sound to harsh.

EEK!! Divide 354 watts by 12 volts and you get a grand total of 32 amps on the +12 volt rails.Here is what I usually post when I make a recommendation:"Corsair and So my guess is that if I simply plug the US 5v/2a ac adapter into a basic plug converter that does not have step down voltage ability then the device and/or The adapter the won't work is labeled like this 12VAC 840mA and this adapter light sup the device but doesn't actually give me any power and i don't understand why.

The 4.2V is just the voltage that your battery will power your phone. Will a 0.5V higher damage my laptop? but now after reading your post last night, i think i already have the idea of what kind of adapter i should look at. Even then it does not matter the input is just an acceptable range.

If it becomes too hot, the speaker can fail (due to the voice coil melting or burning). Figure 3 shows that the output signal is at its maximum undistorted value. Resistive loads primarily offer resistance to the flow of current. This PSU is rated 90W max and supports 15-24V output voltage.

Reply Christine March 31, 2016 at 6:52 am # What does the m mean in 300mA for example? up vote 179 down vote favorite 108 Power supplies are available in a wide range of voltage and current ratings. I have noticed that the supplies of later manufacture tend to list higher current levels than earlier, but also list maximum combined output. Current, as the term implies, refers to the flow rate.

Most European countries are based on a 50Hz frequency. Figure 2 above shows what the output signal of the amplifier would look like if viewed using an oscilloscope.