Power adapter in the field of power plays an important role, but most do not know that the power adapter is accurate, YHY adapter for you to explain in detail.
The accuracy of a power adapter generally refers to the voltage stabilization accuracy, including the output DC voltage accuracy range, the output DC current adjustment rate, and the output DC ripple noise. Ripple noise includes the maximum ripple voltage, the maximum ripple noise voltage.
Generally, this range is ±5%, which is also the international industry standard. The output voltage range of the power adapter is ±5% of the nominal output voltage. For example, the output voltage range of the 5V power adapter is 4.75-5.25V, and the output voltage range of the 12V power adapter is The output voltage range of a 19V power adapter is 18.05-19.95V. The output voltage range of a 24V power adapter is 22.8-25.2V.
The voltage stability coefficient of the power adapter. The relative change of the input voltage causes the relative change of the output voltage under the condition of constant load current and ambient temperature. The voltage adjustment rate of the power adapter, the relative change of the output voltage when the relative change of the input voltage + 10%, the voltage stability factor and the voltage adjustment rate indicate the effect of the change of the input voltage on the output voltage, so only one of them needs to be tested.
The output resistance of the power adapter is the same as that of the amplifier. The value of the output resistance of the power adapter is the absolute value of the ratio of the output voltage to the output current when the input voltage is constant. Current regulation rate, the relative change in output voltage when the output current changes from 0 to maximum. Output resistance and current regulation rate represent the influence of load current change on output voltage.
