Other Power Supply Tests

An observation of any DC power supply data sheet from a power supply manufacturer reveals a number of design specifications that must be verified and tested. These tests often differ in technique and in the test equipment that is used to measure the var- ious parameters. The common aspect of all of these tests is that a method of controlled loading of the power supply outputs is required, which is most easily done with an electronic load. The list below contains a brief description of some of these tests.

Short Circuit Output Current

This test measures the steady-state current of the power supply under test after the output terminals have been shorted. The short circuit can be provided by an electronic load operating in CR mode.

Test Equipment:

•Electronic Load

•Digital Multimeter

•Precision Current Shunt

Drift

This test involves the measurement of the periodic and random deviation of a power supply’s output current or voltage (typically over 8 hours), typically covering a bandwidth from DC to 20 Hz. The elec- tronic load used for this test should be able to oper- ate in CC or CV mode.

Test Equipment:

•Computer (for long-term testing)

•Electronic Load

•True rms Voltmeter

Source Effect (Line Regulation)

A measurement of the change in the output voltage or current due to a change in the source voltage magnitude. The output of interest is measured after it settles within the regulation specifications. The electronic load used for this test should be able to operate in CC or CV mode.

Test Equipment:

•Electronic Load

•Regulated AC Source

•Digital Multimeter

•Precision Current Shunt

Overvoltage Shutdown

Typically, a power supply is expected to shut down if its output voltage exceeds the maximum input voltage of its intended load, the maximum operating voltage of the power supply, or a variably set volt- age limit. The overvoltage protection test demon- strates the ability of the power supply under test to correctly respond to any of those conditions. An electronic load in CC mode can be used to test the output voltage response.

Test Equipment:

•Electronic Load

•Digital Multimeter

Programming Response Time

This test measures the maximum time required for the programmed output voltage or current of a power supply to change from a specified initial value to a value within a specified tolerance band of a newly programmed value, following the onset of a step change in an analog programming signal, or the gating of a digital signal. An electronic load in CC, CR, or CV could be used in this test.

Test Equipment:

•Computer

•Electronic Load

•Digital Multimeter

•Precision Current Shunt

AN 372-1 specifications

Agilent Technologies AN 372-1 is a versatile and highly regarded instrument in the field of electronic testing and measurement. Designed primarily for research and development, as well as validation in production environments, this advanced technology showcases Agilent's commitment to providing high-quality measurement solutions.

One of the standout features of the AN 372-1 is its wide frequency range capability, enabling it to effectively measure signals across various applications. This instrument supports a frequency range extending up to 26.5 GHz, making it suitable for high-frequency applications in telecommunications, aerospace, and defense sectors. With this broad frequency capability, users can rely on the AN 372-1 for accurate and reliable measurements in the most demanding environments.

Another significant attribute of the AN 372-1 is its high dynamic range, which allows for precise detection of both weak and strong signals in the presence of noise. This characteristic is essential for engineers working to ensure signal integrity in complex systems, as it allows for the identification of issues that may otherwise go unnoticed. Coupled with a fast sweep speed, the device can quickly capture transient events or changes in signals, making it a vital tool for time-sensitive applications.

The user interface of the AN 372-1 is designed for ease of use, with a touchscreen display that simplifies interaction and data visualization. Its intuitive design enables users to set up measurements and navigate through the many options effortlessly. Furthermore, the instrument is equipped with advanced analysis features and software that enhance data interpretation and manipulation, allowing engineers to derive meaningful insights from their measurements quickly.

In addition to its measurement capabilities, the AN 372-1 supports advanced connectivity options, including USB, LAN, and GPIB. This ensures seamless integration with other instruments and systems, facilitating a more streamlined testing workflow. The ability to connect with external software also enhances its functionality, allowing users to automate processes and improve test efficiency.

The AN 372-1's rugged design ensures it can withstand the challenges of both laboratory and field use. Its build quality speaks to Agilent's commitment to creating long-lasting instruments that offer reliable performance throughout their lifecycle. Overall, the Agilent Technologies AN 372-1 stands out as a comprehensive tool for engineers and researchers requiring precise, reliable, and efficient electronic measurements across a myriad of applications.