Switch Power Supply 12V 2A 25 Watt with CE RoHS

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Loading Port:: China Main Port

Payment Terms:: TT or LC

Min Order Qty:: 5 Piece pc

Supply Capability:: 3000 Pieces per Day pc/month

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Output Power	1 - 50W
Output Type	Single
Input Voltage	110 or 220
Output Voltage	3~48V
Output Frequency	50/60Hz
Output Current	0.5A~8.3A
Certification	CE ROSH
material	Aluminium

Switching power supply CE ROHS

Built-in EMI filter

Low output ripple noise

Protection:Over load.Over Voltage.short circuit.

Features

1.Low price and high reliability

2.Built-in EMI filter

3.Low output ripple noise

4.2:1 wide input range

5.Protectio cirns Over load.short circuit

6.1500VDC I/O isolation

7.DC adjustment range,less than 10% rated output voltage

8.Line regulation (full load)>0.5%

9.Output over load protection 1055~150% hiccup mode.auto-recovery

Q: How to solve the switching power supply MOS tube and transformer temperature rise is too high: For the secondary side of the transformer rectifier can choose more efficient synchronous rectification technology to reduce the loss. For high-frequency magnetic materials caused by the loss, to try to avoid skin effect, the effect of the skin effect, can be used to multi-stranded paint and around the way to solve. 5.2.2 switching power supply thermal design MOS tube conduction when there is a certain pressure drop, that is, the device has a certain loss, it will cause the chip temperature rise, but the device heat and heat capacity and heat dissipation conditions. As a result, the device power has a certain margin

Q: Switching power supply and communication power difference: Switching power supply is a high-frequency oscillating electronic circuit for voltage conversion. The main contents are: step-up or buck, direct current conversion to alternating current, or alternating current to direct current.

Q: What is the PWM high-frequency switching power supply: PWM is pulse width modulation As mentioned above, through the high-frequency switch output a pulsating DC, the filter output stable DC If the load changes will lead to changes in the output voltage then the system will adjust the output pulsating DC duty cycle to achieve the purpose of regulation. Upstairs that is the working principle of PWM-type inverter. What I'm talking about is switching power supply. Is actually a principle.

Q: How to choose the switching power supply frequency?: Since I do not have power, the following is only a personal view Internal: 1: depends on your topology and power level 2: the choice of IC and switch operating frequency and can withstand the thermal upper limit external: 3: circuit other power device frequency range 4: assigned to the various devices Limit the temperature is acceptable, in terms of volume, efficiency, cost, heat, system stability, etc., the parties weigh the next value, then the frequency of the better the common frequency as small, the corresponding magnetic device volume will be relatively large, and Frequency is large, the device is small, but the switch loss, of course, core loss is also large, unacceptable. If there are problems please go to the big bit forum to ask me, if you help the busy also hope to adopt the answer!

Q: Now I want to buy a larger power test power, about 1KW. I have no money, so I want to buy a switching power supply, so that you can save a lot of money, but do not know can not accept the emotional load: Yes, the actual use of a lot. When using the attention, the output connected to a switch, stop, do not directly off the power, you must first disconnect the switch, to avoid inductive load current after the sudden change in the potential to damage the power supply. The above matters, even if other power supply, should be kept as far as possible.

Q: Switching power supply efficiency: if the output current 2 / 10v, when the diode conduction voltage is 0.7v, the loss of 0.7 * 2 = 1.4W, transformer output (10 + 0.7) * 2 = 21.4 watts, available power of 20 watts, efficiency of about 90%; ?? Note: Only the output loss is calculated, excluding the transformer and other losses.

Q: Direction switching power supply: Switching power supply applications in the power electronic devices are mainly diodes, IGBTs and MOSFETs, transformers. SCR in the switching power supply input rectifier circuit and a soft start circuit in a small amount of application, GTR drive difficult, low switching frequency, and gradually replaced by IGBT and MOSFET. Switching power supply development direction is high frequency, high reliability, low consumption, low noise, anti-interference and modular. As the switching power supply light, small, thin key technology is high frequency, so the major foreign switching power supply manufacturers are committed to simultaneously develop new and highly intelligent components, in particular, to improve the secondary rectifier device loss, and power iron Oxygen material on the scientific and technological innovation to improve the high frequency and large magnetic flux density (Bs) to obtain high magnetic properties, and the miniaturization of the capacitor is also a key technology. The application of SMT technology makes the switching power supply has made great progress in the circuit board on both sides of the layout components to ensure that the switching power supply light, small, thin. Switching power supply on the high frequency of traditional PWM switching technology must be innovative, to achieve ZVS, ZCS soft switching technology has become the mainstream switching power supply technology, and significantly improve the efficiency of switching power supply. For high reliability indicators, the US switching power supply manufacturers by reducing the operating current, reduce the junction temperature and other measures to reduce the stress of the device, making the product greatly improved reliability.

Q: When switching power supply is the most efficient: This is the design of the time according to the different needs of customers set Generally should be in the 80% load, rated input, a certain temperature under the circumstances to obtain the highest efficiency Specific reference to the power supply specifications

Q: The hands of a switching power supply, the use of 2SC3320 switch, the output is 24V7A, after adding the load will always burn 2SC3320 switch, no load no problem, how is it, there are drawings, that expert help to see, thank you: The power switch works in the switch state, the cause of its damage, in addition to over-current over-voltage, but also taking into account the duty cycle, that is, saturated conduction time and cut-off time ratio.

Q: Such as my primary with double shares 0.51 line, the secondary with four shares 0.51 line, if the secondary I used two 0.71 lines to replace the four shares of 0.51 line influential?: If the skeleton of the transformer can be around, you can, with the purpose of multi-strand line: mainly to increase the coupling force of magnetic field lines, is conducive to EMC, as well as reduce the skin effect, of course, when the pin winding, too rough , Will generally be made in the form of flying line. The final choice or to cost, performance, easy to set up for the integrated consideration.

Nowadays, our products are exported to numerous countres, like US, Australia, UK, etc. Successful improvements on technical processes and professional customer services have been recognized by more and more new or old customers. We hardly receive any negative feedback from customers. Our products so far have catched up with the consistency with world standard .

1. Manufacturer Overview

Location	Zhejiang,China (Mainland)
Year Established	2011
Annual Output Value	Below US$1 Million
Main Markets	Southern Europe 4.57% Domestic Market 28.13% North America 22.50% South America 12.31% Eastern Europe 1.76% Southeast Asia 9.85% Oceania 0.28% Mid East 9.00% Eastern Asia 0.84% Western Europe 8.65% Northern Europe 2.11%
Company Certifications	gistration of a foreign trade operator; BUSINESS LICENSE; Custom Import & Export licence

2. Manufacturer Certificates

a) Certification Name
Range
Reference
Validity Period

3. Manufacturer Capability

a) Trade Capacity
Nearest Port	Oakland,Buenos aires,BOGOTA
Export Percentage	51% - 60%
No.of Employees in Trade Department	3-5 People
Language Spoken:	English, Chinese
b) Factory Information
Factory Size:	1,000-3,000 square meters
No. of Production Lines	5
Contract Manufacturing	OEM Service Offered Design Service Offered
Product Price Range	Average