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Agilent AN 372-1

Power Supply Testing

Application Note

An electronic load offers a broad range of
operating modes, providing versatile loading
configurations needed for characterizing and
verifying DC power supply design specifications.

Содержание AN 372-1

Страница 1: ...Power Supply Testing Application Note An electronic load offers a broad range of operating modes providing versatile loading configurations needed for characterizing and verifying DC power supply desi...

Страница 2: ...ecovery time specifications However they are relatively inefficient when compared to switching power supplies and tend to be large and heavy due to the heat sinks required to contin uously dissipate p...

Страница 3: ...ent A system which utilizes standard instrumen tation is modular allows configuration flexibility based on performance needs and is easier to upgrade In addition the service replacement or calibration...

Страница 4: ...ramming accuracy accuracy accuracy accuracy accuracy Trigger output to CC or CR mode CR or CC mode CC or CR mode CC or CV mode CR mode the oscilloscope Low PARD Digital tsample 100 ns N A N A tsample...

Страница 5: ...econds or milliseconds and varies in value depending on the topology of the power supply under test The electronic load used in this test should have a risetime at least five times faster than the pow...

Страница 6: ...de after the load is varied from the minimum to the full current rating of the power supply under test Figure 4 Measurement of the AC input voltage is necessary to ensure that the output voltage chang...

Страница 7: ...er value The purpose of current limiting is to provide protection for the power supply and the device being powered assum ing the current limit value is below the maximum current rating of the device...

Страница 8: ...e applications a low output ripple specifica tion is critical An example would be where the power supply is providing power to a high gain amplifier with inadequate ripple rejection for the applicatio...

Страница 9: ...iminate cable ringing and standing waves the typical configuration includes coaxial cabling with 50 Ohm terminations at both ends Capacitors should be connected in series with the signal path to block...

Страница 10: ...ower supply is the amount of time between the application of AC input and the time at which the outputs are within their reg ulation specification For switching power supplies or power supplies with c...

Страница 11: ...input frequency and amplitude to the power supply under test a regulated AC source should be used Turn on of the AC source at selected 60 Hz 50 Hz phases zero crossing and positive or negative peak v...

Страница 12: ...lectronic Load Regulated AC Source Digital Multimeter Precision Current Shunt Short Circuit Output Current This test measures the steady state current of the power supply under test after the output t...

Страница 13: ...also change in response to external triggers from other test equipment For testing multiple output power supplies Agilent offers the 6050A 1800 Watt Load Mainframe This product provides an economical...

Страница 14: ...20 547 2323 fax 31 20 547 2390 Japan tel 81 426 56 7832 fax 81 426 56 7840 Latin America tel 305 269 7500 fax 305 269 7599 Australia tel 1 800 629 485 fax 61 3 9210 5947 New Zealand tel 0 800 738 378...

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