Regulated DC powering for electronics equipment
Due to the characteristics of electronic technology, the requirements of electronic equipment on the power supply circuit is to be able to provide continuous and stable, to meet the requirements of the load of electrical energy, and usually require the provision of stable DC power. The power supply that provides this stable DC power is the DC regulated power supply. According to the operating state of the regulator, DC regulated power supply can be divided into two categories, linear regulated power supply and switching regulated power supply.
Output Voltage Range
The output voltage range that can work normally under the working conditions of DC regulated power supply. The upper limit of this index is specified by the *large input voltage and *small input-output voltage difference, while its lower limit is determined by the reference voltage value inside the DC regulated power supply.
Maximum Input-Output Voltage Difference
This index characterises the permissible *maximum input-output voltage difference under the normal working conditions of the DC regulated power supply, the value of which mainly depends on the voltage withstand index of the adjustment transistor inside the DC regulated power supply.
Minimum input-output voltage difference
This index characterises the * small input - output voltage difference required to ensure that the DC regulated power supply under normal operating conditions.
1, the impact of the input voltage range, when the input voltage is too high, it will make some components of the added voltage is too high or consume too much power and damage, when the input voltage is too low, it will make some components of the performance degradation, and even can not work.
2, the impact of voltage instability, for example, the oscilloscope power supply must be stable to ensure that the light point of the deflection sensitivity, scanning time and other accurate; and, for example, the digital voltmeter requires a very stable internal power supply to ensure that the voltage / digital conversion accuracy.
3, the impact of over-voltage at the output, for example, DC regulated power supply output voltage beyond the rated voltage of the integrated circuit of more than 30%, may cause extensive damage to the integrated circuit.
4, the impact of a brief power outage, for example, municipal communications can not be instantaneous power outage, otherwise the global communications interruption, resulting in major incidents.
Stories; Another example, computers and other AC power supply, AC uninterruptible power supply should be used.
This shows how important the role of DC regulated power supply in electronic equipment, can completely eliminate these effects, the working process of electronic equipment plays a very large maintenance role.
