12V 2A Power Supply Led Strip Light

Description

Universal 12v dc power supply,First of all, the nominal voltage of the general power supply refers to the open circuit output voltage, that is, the voltage when there is no load outside and there is no current output, so it can be understood that this voltage is the upper limit of the output voltage of the power supply.

When the active voltage stabilizing elements are used in the power supply, even if the mains voltage fluctuates, its output is constant. For small transformers on the market, such as Walkman, if the mains voltage fluctuates, the output of the power supply will not fluctuate.

Specification

Voltage: 100-240VAC

Frequency: 50-60Hz

Output Specification

Voltage:12V

Current:0.8A

Power:12W

Plug Type: 5.5mm x 2.5mm

Turn On Time:15-30mS

Voltage Accuracy: ±3%

Current Accuracy: ±3%

Tests Environmental

Hi-pot Test: 3750VAC, 60S, 5mA max

Lightning surge: up to 1000V (accept 3000V)

Leakage Current: 0.25mA max

Burn-in Test: rate load, 40±3℃, 4 hours

Operating Temperature:0-40℃

Generally speaking, the real no-load voltage of ordinary power adapter is not necessarily consistent with the nominal voltage, because the characteristics of electronic components can not be completely consistent, so there is a certain error. The smaller the error is, the higher the requirement for the consistency of electronic components is, the higher the production cost is, so the price is more expensive.

In addition, with regard to the nominal current value, no matter what the power supply has a certain internal resistance, when the power supply outputs current, it will produce a voltage drop internally, resulting in two things: one is to generate heat, so the power supply will be hot, the other is to reduce the output voltage, which is equivalent to internal consumption.

2、 Are the same nominal voltage power supply, different output current, can be used in the same notebook?

The same  adapter 12vdc 2a voltage, different output current, can be used in the same notebook. The basic principle is that the power supply with large nominal current can replace the power supply with small nominal current. It is estimated that some people will think that a power supply with large nominal current will burn out the notebook, because the current is large. In fact, the current depends on the load at the same voltage. When the notebook is in high load operation, the current is higher. When the notebook is in standby, the current is lower. The power supply with large nominal current has enough current margin. On the contrary, it is no problem for someone to use 56W power supply instead of 72W power supply. The reason is that there is a certain margin in the design of power adapter, and the load power is less than the power supply power, so this kind of replacement is feasible in general use, but the residual power is very small. Once your notebook is connected with many peripherals, such as two USB hard disks, Then the CPU runs at full speed, and there is a base on which an optical drive reads the disk at full speed. In addition, it charges the battery at the same time, which is estimated to be dangerous. Therefore, it is better not to use small current power supply instead of large current power supply.

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