The input of the power adapter is the parameter when charging the rechargeable battery. If the input is 5v1a, it can only be charged with a 5v adapter, and the current can be lower than 1a but not more.
As the power adapter is very widely used, so about the safety of the power adapter has always been a problem to consider. This requires its performance and safety must be up to standard, so the function test of the power adapter is especially important, the next will be analyzed and understood from the input characteristics and output characteristics of the power adapter.
Output refers to the parameters of the rechargeable power supply to cell phones and other devices. If the phone battery is 5v1a, it can only be charged with a 5v interface, not with an interface higher than the 1a current to charge the phone.
Input characteristics: working input voltage and voltage variation range. The frequency of the input voltage and the range of frequency variation. Rated input current. It is the current at the input voltage and output current at the rated condition. Input sag and momentary blackout. This is a state where the input voltage drops or cuts off instantaneously, and is to be qualified by the rated output voltage and current. The indicators tested are voltage and time. Inrush current. Leakage current. Efficiency. Because this indicator is related to heat generation, so the efficiency should be considered when dissipating heat. The test should indicate whether the input is single-phase 2-wire type or 3-phase 3-wire type.
Output 5V 800MA means that the output voltage is positive 5V matching current 800 mA! Some devices need more current so there is 5V 1A power charger (which means it is more power hungry). 1A charger is available for 800MA devices, but 800 mA power supply is not able to carry 1A devices.
Output characteristics: Rated output voltage. Rated output current. Voltage regulation accuracy. Voltage stability. Current regulation rate. Ripple noise. Including maximum ripple voltage; maximum ripple noise voltage. The value of output voltage variation due to instantaneous current variation.
