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Date Submitted Wed. Jun. 12th, 2013 11:26 AM
Revision 1
Helper aussiegadget
Tags "DC Power" | "laptop adapter"
Comments 0 comments
In a variety of electronic products, DC-DC power adapter is a lot of use. Such as a laptop inside, CPU requires a 5V power supply, the display needs to 8V power supply, fans need 12V and so on. But the battery can only provide a voltage, such as 12V, therefore, you must use the DC-DC power conversion modules to provide other different voltages, the same sort of situation occurs phones, tablet computers, automotive car chargers and other occasions.

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Simply put, the common DC-DC voltage converter adapter play a major role, as shown below, if the voltage of the power supply system is 12V, and 5V voltage electrical equipment, we need such a DC-DC power adapter.

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But in fact and common DC-DC switching power supply adapter (AC / DC) of the transformation process is basically the same, as shown in the AC-DC switching power supply schematic block diagram is shown. DC / DC is less than the input of the rectifier and filter circuit, the subsequent process is almost the same.

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Thus, strictly speaking, DC-DC power supply must also meet the full performance requirements in order to ensure the quality of power supply. These indicators include:

1 Input voltage, current and power range;
(2) Output voltage, current and power;
3 Output voltage accuracy;
4 input current surge;
5 ripple noise;
6 source / load regulation;
7 conversion efficiency;
8 Output voltage rise time;
9 Input and output on and off delay;
10 Depletion standby power;

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Test DC-DC power supply, typically requires a variety of measurement instruments, including DC power supplies, DC electronic load, oscilloscope, digital multimeter, etc., and in the following diagram to test the connection.

That there is no such a piece of equipment, along with DC power supplies, DC electronic load, oscilloscope, digital voltmeter and ammeter function, can accomplish more than a single instrument all the tests?

Below want to introduce such a station is the industry's most powerful DC Power Analyzer, which is a Observing equipment - Agilent N6705B DC Power Analyzer.

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The following are some of a DC-DC test items measured results:

Through the above test items and reports, we see N6705B built-in power supply, load, oscilloscope, arbitrary waveform generator function, a single N6705B will be able to conduct a complete DC-DC power supply indicator testing.