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Supply Capability:: 50000 Pieces per Month pc/month

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Specificatons

*AC.AUTOMATIC VOLTAGE REGULATOR SPR SERIES

*Automatic Voltage Regulation

*Protection against Brownouts & Over voltage

*Wide input voltage range

*Short Circuit protection

*Low Voltage & High Voltage protection

*LED to show Input and Output voltage

*With delay function

*Temperature protection option

*Buit-in thransformer: Square Transformer

*Surge.Spike and Lighting Protection

Delivery

Delivery Detail:within one month after receiving deposite payment

Q:Use 7812 to make a positive 12V DC power supply Is 220V AC voltage correction 12V: If the transformer secondary symmetrical center tap, with full-wave rectification, then the secondary voltage can also be set lower, 11.5V ~ 12V can be.

Q:Can DC power supply be used as a charger for lithium batteries?: Can not be directly as a lithium battery charger. Lithium-ion battery on the charger requirements are higher, in the initial charge should be in accordance with the constant current charging mode, theoretically the smaller the charging current the better the battery, but it takes too long is not practical, China's national standard low-rate charge Is 0.2C (C is battery capacity). Battery voltage with the charging process gradually increased, when the battery voltage reaches 4.2V, you need to change the constant current charge for constant voltage charging. With the constant charge charging process continues to reduce the charging current gradually, when reduced to 0.01C, that charge termination. As the lithium-ion battery nominal voltage of 3.7V, charge cut-off voltage of 4.2V, there are significant differences, so the use of fixed voltage regulator power supply can not be constant current charging, must start the current is too large, or the back of the current is too small. If the voltage regulator of the voltage regulator is low, although the starting current is not large, but there will be full of dissatisfaction; if the tune is higher, the initial stage of charge due to the battery voltage is too low, the pressure difference is too large Charging current Excessive shortcomings, greatly shorten the battery life; if the output voltage accuracy is poor, the voltage exceeds the upper limit of 4.2V, will occur overcharge, serious damage to the battery. In addition, the regular charger is also equipped with: the temperature control during charging; LED charging status indication; battery abnormal state detection and other additional circuit functions. So the DC power supply must be through a dedicated constant voltage, constant current control circuit to charge the lithium battery.

Q:DC power supply through what way to achieve the purpose of regulation: DC power supply is generally divided into two categories, one is linear regulator, the common is to use a three-tube voltage regulator tube, by changing the transistor base voltage to adjust the output voltage to achieve the regulator output Purpose, generally used in low-voltage regulator circuit, the transistor work loss is great, relatively serious heat, generally need a larger heat sink, due to the transistor limit, the output circuit is generally less than 5A, greater than the current need to adjust the tube in parallel.

Q:DC power supply in front of the capacitor used to rectify, that the regulator output and the size of the capacitor what is the use of what: Is used for filtering. DC capacitor power supply in front of the capacitor is also used to filter. Rectifier bridge is rectified, composed of four diodes.

Q:I would like to ask: DC power supply when the ground terminal when used? how to use?: Ground (PE): not used for working circuits, only as a protection line. The use of the absolute zero voltage of the earth, when the equipment shell leakage, the current will quickly flow into the earth, even if the PE line has an open circuit, will also flow from the nearby ground into the earth ? And then better, if it is a metal shell, to prevent electric shock; also can provide electrostatic discharge circuit ? Connection: received three-core power supply on the ground, if there is buried copper pillars, then better in the above, because more pure

Q:Hello! I would like to ask you a question! My computer in a sudden loss of power after a home, then I want to go home with a voltage regulator, standby power function of the machine, the market there is no such machine, where installed can protect all the electrical appliances at home? Thanks: Hello there! You said the function requires two machines to complete: 1, the regulator: the external network input voltage is stable at the standard mains voltage of about 220V device. Installed in your home meter behind you can protect all the appliances. Power grid voltage is too high, beyond the upper limit of household appliances design, household appliances can not withstand the high voltage and the possibility of damage. The grid voltage is too low, the starting current of the electrical appliances will be low starting voltage, start the current is small and can not start normally, serious may make it long in the start of the high current state and damage the core components. 2, uninterruptible power supply (UPS): is to give your appliances to provide an uninterrupted power supply, such as power failure when your computer is not a power outage to eliminate the illegal shutdown caused by unnecessary losses. Due to power constraints, can not receive high-power appliances, in fact, no need to pick up other electrical appliances, only connected to the computer just fine.

Q:AC power supply and DC power supply difference: AC power supply is the AC power supply is stable AC power. DC power supply is DC power supply

Q:Why is the DC regulated power supply connected to the load circuit after the voltage is reduced: Heavy load, beyond the power load capacity.

Q:The working principle of DC regulated power supply: DC power supply principle DC power supply is a 220V frequency AC power conversion into a constant voltage output DC voltage device, it needs to transform, rectify, filter, regulator four links to complete, see Figure 1. Figure 1 DC power supply block diagram Among them: (1) power transformer: is a step-down transformer, it will convert 220V AC voltage to meet the needs of the AC voltage, and sent to the rectifier circuit, the transformer ratio by the transformer secondary voltage to determine. (2) rectifier circuit: the use of one-way conductive components, the 50Hz sinusoidal alternating current into pulsating DC (3) filter circuit: the rectifier circuit output voltage in the majority of the AC component to be filtered, resulting in a relatively smooth DC Voltage. (4) voltage regulator circuit: the function of the regulator circuit is to stabilize the output DC voltage, does not change with the AC grid voltage and load changes. Rectifier circuit often use diode single-phase full-wave rectifier circuit, the circuit shown in Figure 2. In the positive half of u2, the diodes D1, D2 conduction, D3, D4 cut off; u2 negative half weeks, D3, D4 conduction, D1, D2 cut off. Positive and negative half of the internal current flowing through the load resistance RL, and the direction is the same. The output waveform of the circuit is shown in Fig.

Q:What is the difference between regulated power and UPS power supply?: Can provide a stable voltage output are called power supply, also known as power regulator, referred to as the regulator. By use is divided into; AC power supply and DC power supply

We are committed to provide high quality products and services to meet diverse customer requirements and diverse market requirements. With the same diligent customer-oriented spirit, we are dedicated to continuously designing, manufacturing, marketing, and introducing our products to the diverse demanding power market.

1. Manufacturer Overview
Location	Zhejiang,China (Mainland)
Year Established	1997
Annual Output Value
Main Markets	South America 3% Eastern Europe 4% Southeast Asia 10% Africa 25% Oceania 3% Mid East 5% Eastern Asia 5% Western Europe 2% Central America 3% Northern Europe 1% Southern Europe 1% South Asia 3% Domestic Market 30% North America 5%
Company Certifications	CE; CE Certificate for DC Power Supply; Association Techenologie Nouvelle De France; Certificate of UPS

2. Manufacturer Certificates
a) Certification Name
Range
Reference
Validity Period

3. Manufacturer Capability
a)Trade Capacity
Nearest Port
Export Percentage	71% - 80%
No.of Employees in Trade Department
Language Spoken:
b)Factory Information
Factory Size:	10,000-30,000 square meters
No. of Production Lines	8
Contract Manufacturing	OEM Service Offered Design Service Offered Buyer Label Offered
Product Price Range