AC To DC Wall Plug

Description

AC to wall adapter and DC-DC converter is to repeatedly turn on / off the switch, convert the DC voltage (current) into high-frequency square wave voltage (current), and then smoothly change it into DC voltage (current) output through rectification. DC-DC converter consists of semiconductor switch, rectifier diode, smoothing filter reactor, capacitor and other basic components. When electrical isolation is required between input and output, transformer can be used to transmit high-frequency square wave voltage (current) to output side through transformer. The basic components constituting the DC-DC converter are shown in Figure 1-3. In the figure, UI is the unstable DC voltage after rectification; Uo is the output voltage after chopping; S is the switch.

Specification

1) Small volume, light weight, streamlined, fully sealed and easy to carry

2) High cost performance and high reliability;

3) Built in overvoltage, overcurrent and short circuit protection;

4) Input characteristics: voltage: 100-240Vac ± 10%; Frequency: 50 / 60Hz; Current: 0.35A max;

Start time: 3smax; Starting impulse current: 20A / 240VAC max;5) Output characteristics: constant voltage mode; High precision and low noise; Holding time: 20ms min;

6) Environment: working temperature: 0 ℃ - 40 ℃, 5% - 90% RH;

Storage temperature: - 20 ℃ - 85 ℃, 5% - 95% RH;

7) Cooling mode: natural cooling;

8) Meet the energy efficiency: ERP / cec-vi standard;

9) Safety standards: iec60950-1, j60950-1 (H22), j55022 (H22), j3000 (H21);

10) Comply with ROHS standard;

11) pin type: PSE;

12) Average failure rate: 50000 hours;

Power adapter application

USB 2a wall adaptor for Air purification,45w wall charger for medical equipment,AC to DC wall plug for IT equipment

Attention:

First of all, the nominal voltage of the general 9 volt wall adapter refers to the open circuit output voltage, that is, the voltage when there is no load and no current output, so it can also be understood that this voltage is the upper limit of the power supply output voltage.

When active voltage stabilizing elements are used inside the power supply, even if the mains voltage fluctuates, its output is also a constant value. For the 90 degree wall outlet power supply equipped with small transformers on the market, such as Walkman, if the mains power fluctuates, the output of the power supply will not fluctuate.

Generally speaking, the real no-load voltage of an ordinary power adapter is not necessarily completely consistent with the nominal voltage, because the characteristics of electronic components cannot be completely consistent, so there is a certain error. The smaller the error, the higher the consistency requirements of electronic components.

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