What technical indicators does the DC stabilized power supply have?
The technical indicators of DC regulated power supplies can be divided into two categories: one is the characteristic indicators reflecting the internal characteristics of voltage-stabilized DC power supplies, such as input voltage, output voltage, and output current. One is the characteristic index that reflects the internal characteristics of the voltage-stabilized DC power supply, such as input voltage, output voltage, output current, etc., and the output voltage setting range; the other is the quality index that reflects the advantages and disadvantages of the voltage-stabilized DC power supply, such as stable Resistance, equivalent internal resistance (output resistance), ripple voltage, temperature coefficient.
1. Characteristic indicators
(1) Output voltage range
Depending on the operating conditions of the DC regulator, the output voltage range can operate normally. The upper limit of this indicator is determined by the difference between the maximum input voltage and the minimum input and output voltage, and the lower limit is determined by the voltage basis of the DC power supply.
(2) The maximum difference between input and output voltage
This indicator describes the allowable voltage difference between the maximum input voltage and the output voltage of the DC regulator under normal working conditions, and its value mainly depends on the voltage ratio of the voltage regulator transistor in the DC regulator.
(3) Minimum input and output voltage difference
This indicator describes the minimum voltage difference between the input and output to ensure the normal working conditions of the DC regulator.
(4) Output load current range
The output load current range, also known as the output current range, within this range, the DC power supply must be able to meet the indicators specified in the specification sheet.
2. Quality indicators
(1) Voltage regulation speed SV
Stabilization speed is an important index to describe the stability characteristics of DC power supply, also called voltage stability coefficient or stability coefficient, it indicates the stability of the output voltage VO of the input DC power supply when the input voltage VI changes, usually the input and output voltages are between Relative percent change in device output voltage
(2) Current correction rate Si
The current correction rate is the main self-adjustment index reflecting the load capacity of the DC power supply, also known as the current stability coefficient. It shows the ability of the DC power supply to suppress the output voltage fluctuation caused by the change of the load current (output current) when the input voltage is constant.
Under a certain load current change condition, the current stability factor of the DC power supply is usually expressed as a percentage lower than the output voltage change of the device.
(3) The ripple rejection ratio is greater than SR
The structural wave suppression ratio reflects the ability of the DC power supply to suppress the input voltage at the input. When the input and output conditions of the regulated DC power supply are kept constant, the texture wave suppression factor is usually expressed as the ratio of the peak value of the texture wave input voltage to the peak value of the texture wave output voltage, usually expressed in decibels, but sometimes also expressed as a percentage or Expressed directly as the ratio of the two.
(4) Temperature stability K
The temperature stability of the integrated DC regulated power supply refers to the relative change percentage of the output voltage of the DC regulated power supply within the maximum operating temperature range Ti of the DC power supply.
3. Upper limit voltage and current
(1) Maximum input voltage.
This is the maximum input voltage for safe operation of the DC power supply.
(2) Maximum output current.
This is the maximum output current allowed by the regulated power supply for safe operation.
