Principles and functions of DC stabilized power supply
The principles of operation and specifications for DC stabilized power supply performance. The following components are typically found in the DC stabilized power supply circuit for mobile phone repair: benchmark stabilized power supply; transformer secondary AC voltage automatic adjustment circuit; series DC stabilized power supply, including adjustment amplification and constant voltage circuit; constant current adjustment and constant voltage and constant current conversion display part. In addition to these features, certain DC stabilized power supplies additionally monitor radio frequency signals and offer self-recovery, voltage measurement, and short circuit protection.
The following indications are the primary performance requirements for the DC regulated power supply used in mobile phone repair.
1. The lithium-ion battery has a 3.7V output voltage and a 3.7V–4.2V charging voltage range. The DC regulated power source only needs to be able to deliver 0–5 volts because a power supply that is higher than 5 volts could burn up the chip in the phone. Variable voltage works well.
When utilizing a DC stabilized power supply, you should be aware of the output voltage to prevent damaging your phone's chips from high voltage. Most DC stabilized power supplies on the market have an adjustable output voltage range of 0 to 15V.
2. During a call, the machine's instantaneous current output can surpass 500ma or surpass it. As a result, the regulated power supply's output current needs are larger. The current output is typically tunable between O-1A.
A misdiagnosis of errors may result from issues like the mobile phone going on and off, the transmitter turning off, and calls being cut off if the regulated power supply's output current is too low. In order to prevent excessive internal resistance, which could cause the mobile phone transmitter to shut down, it's important to keep in mind that the output leads of the regulated power supply should be as short and thick as possible. Avoid using leads that are too long or thin.
Apart from the two performance measures mentioned above, there are additional indicators as follows: The accuracy of the voltage display is 0.1V, the current indication is 2.5 levels, and the ripple noise is ≤0.5mV MS.
