Two technical specifications of the 27V DC power supply; it is a device capable of maintaining stable voltage and current. For instance: dry cells, lead-acid batteries, DC generators, etc. However, many may not be aware of the two indicators of DC power supplies.
A key indicator is the characteristic indicator, which primarily encompasses the adjustable range of input/output current, as well as the adjustable range of input/output voltage.
Two key quality indicators are the stability of output current and voltage, including the voltage stability coefficient, output resistance, and ripple voltage.
(1) Voltage Stabilization Coefficient: This refers to the relative change in output voltage caused by the change in input voltage, under the condition that the load current and ambient temperature remain unchanged. The voltage stabilization coefficient and the voltage adjustment rate both clearly demonstrate the impact of input voltage on output voltage.
(2) Output Resistance and Current Adjustment Ratio: The output resistance is the same as the amplifier's resistance. This value represents the ratio between the output voltage and the output current when the input voltage remains constant. The current adjustment ratio refers to the relative change in output voltage when the output current varies from minimum to maximum.
(3) Ripple Voltage: The AC component superimposed on the output voltage, visible as a peak in millivolts when observed with an oscilloscope.
