Description

China Shenzhen 1500W Adjustable DC power supply 125V 250V 300V 500V 12A 6A 5A 3A Switching dc power supply test equipment

FEATURES

(1) Small size and light weight are suitable for work surface use and rack installation.

(2) Using PWM modulation, the consumes power of crystal module is low, high efficiency, and more power.Well-designed electronic technology circuit, forced air cooling and heat treatment, with a very low temperature coefficient.

(3) Low noise and low ripple.

(4) Using high gain amplifier circuit design, with good fast response characteristics.

(5) Using a 4-bit high sampling rate, high-resolution voltage, current digital display meter.

(6) Built-in O.V.P over-voltage protection circuit and O.T.P over-temperature protection circuit, the protection function is perfect and reliable.

(7) This product is designed with load terminal voltage detection terminal, which has the function of accurately reading the voltage of the load terminal and performing precise control.

TECHNICAL PARAMETRIC

III.REFERENCE PICTURE

IV.How to e Choose a a e Suitable DC r Power Supply

1) Any test of components, circuit boards, modules or devices requires the use of one or more DC power supply to supply power to the tested object and test excitation source.

2) uIn addition to supplying power to the tested object, these power sources can sometimes provide test incentives by simulating the working environment of the tested object.

3) uFor example, multi-range chargers can charge 12VDC or 24VDC batteries, and the maximum charging voltage will reach about 28.8VDC. For electronic products, conventional testing projects will include OVP testing of products, and the voltage used in OVP testing will usually be 10% or even 20% higher than the rated working voltage. For automotive circuits with rated 12VDC voltage, the maximum input voltage is still possible. As high as 27VDC, some automotive standards require that a device with a normal working voltage of 12VDC be tested at a 27VDC voltage limit. These basic factors determine people's requirements for power supply.

4) uBefore purchasing DC power supply, decide whether to use linear power supply or switching power supply according to your application type. Linear power supply has low ripple and noise, fast transient response, but low efficiency, high calorific value, and large and heavy. Generally speaking, it is possible to choose linear power supply when ripple and noise are low and transient response is fast.

5) uEven in applications requiring low ripple and noise output, the switching power supply can often cope with it with ease. This is because the latest development of power electronics technology has greatly improved the ripple and noise parameters of switching power supply.

6) uIn more and more applications, switching power supply will gradually replace linear power supply. The main reasons are as follows: the ripple and noise of switching power supply have been greatly improved, the volume of switching power supply is small, the power density is high, the efficiency is high, the power is high, and the switching power supply is easy to control (including master-slave control, series-parallel control, global control, etc.).

V. Linear DC power supply may be the best choice for the following applications:

1.Radio, Mobile Phone, Radar-Application

The common feature of these devices is that they all have very sensitive discriminator or demodulator circuits, which are not suitable for working in high noise environment. To test the real performance of these products, it is necessary to ensure that DC power supply does not introduce any parasitic noise to the test.

2.Low Power Electronic Products- Application

Low power (usually below 200W) linear power supply and switching power supply price difference is small, and linear power supply has more advantages.

3.The system requires fewer channels

For this kind of application, the main consideration is that the volume and weight of the sex line power supply have little influence because of the small number of channels, and for the programmable power supply, the number of channels is small.

Serial parallel machine, master-slave control, or global control is not required, linear power supply can meet.

VII. When we choose a suitable switching DC power supply, what are the main aspects to consider? Choosing a suitable switching DC power supply can be considered from the following aspects:

(1)Voltage, Current and Power Requirement Range

(2)Confirmation of Series and Parallel Operation Requirements

(3)Communication and Control Requirements

(4)Transient response

(5)Ripple

(6)precision

(7)Temperature coefficient

(8)Load Adjustment Rate

(9)Linear adjustment rate

(10)Compensation function

(11)Constant Current Model

(12)Stability and reliability

(13)budget

VIII.Difference between Switching Power Supply & Linear Power Supply in application

(1) Linear power supply power devices work in an on-line state, that is to say, they work all the time when they are used, which leads to their work.

(2) The efficiency is low, generally in the range of 50%-60%, and the volume is large, bulky, inefficient and calorific. But linear power supply has advantages that switching power supply does not have.

(3) Small ripple, good adjustment rate, little external disturbance. Suitable for use with analog circuits, various types of amplifiers, etc.

(4) Switching power supply has small volume, high current and high efficiency, but it has large ripple and interference. With the development of electronic technology, the design of switching power supply becomes more and more important.

(5) More and more scientific, the shortcomings of switching power supply will be gradually eliminated, so switching power supply will be the mainstream trend of future applications, gradually replacing linear power supply.