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Constant voltage accuracy
In power supply equipment, this indicates the stability of the output voltage when the input voltage or output current is varied. It is expressed as the amount of variation in the output voltage or as a percentage of the variation relative to the rated output voltage. There are several types of voltage regulation accuracy, which mainly indicate the variation value of the output voltage when the following conditions are changed within specified ranges.
| Static input variation | Variation value when the input voltage is changed gradually |
|---|---|
| Dynamic input variation | Variation value when the input voltage is changed rapidly |
| Static load variation | Variation value when the load current is changed gradually |
| Dynamic load variation | Variation value when the load current is changed rapidly |
| Ambient temperature variation | Variation value when the ambient temperature around the equipment is changed |
| Initial drift | Variation value from power-on until reaching operating temperature (typically after 30 minutes) |
| Long-term drift | Variation value from after reaching operating temperature (typically 30 minutes after power-on) to a specified time later (8 hours later) |
For example, for equipment used in locations with severe temperature fluctuations, it is desirable to select products with excellent voltage regulation accuracy against ambient temperature variation, choosing equipment with superior voltage regulation accuracy according to the usage conditions.