Vivanco UNIVERSAL SWITCHMODE AC TO DC MAINS ADAPTERS WITH USB CHARGING FUNCTION Guida Utente Scaricare il pdf (Pagina 77)

System Operation

A power meter is capable of measuring the input Power Factor of the SMPS AC/DC

Reference Design and also the Total Harmonic Distortion (THD) on the current drawn

by the system.

Using a programmable AC source will enable the user to evaluate the system

performance over the entire range of input voltage (85V-265V, 45Hz-65Hz).

4.2.2.2 OUTPUT PERFORMANCE TESTING

The SMPS AC/DC Reference Design can be loaded using DC electronic loads. A

number of output parameters can be tested by connecting oscilloscope probes to the

output terminals. Some of the parameters that can be tested are:

• Output Ripple Voltage

• Load Regulation

• Transient Response

• Step-Load Response

• Fault Shutdown Delay

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Vivanco UNIVERSAL SWITCHMODE AC TO DC MAINS ADAPTERS WITH USB CHARGING FUNCTION Guida Utente Pagina 77