In the field of switching power supply circuit board cloning from active shunt regulators and dummy loads from AC to low-voltage DC, flyback is the most popular topology at present, so engineer can choose to apply for switch power board reverse engineering to extract original layout diagram and gerber file, then redesign power tuning module pcb board;
One of the main reasons for this is its unique cost-effectiveness, which can provide multiple output voltages by simply adding additional windings to the transformer secondary.
In the field of switching power supply circuit board cloning from active shunt regulators and dummy loads from AC to low-voltage DC, flyback is the most popular topology at present,
Usually, the feedback comes from the output that has the most stringent requirements for output tolerance. This output then defines the number of turns per volt for all other secondary windings. Due to the leakage inductance effect, the output terminal can’t always obtain the required output voltage cross-regulation, especially when the given output terminal may have no load or the load is extremely light due to the full load of other output terminals.
You can use a post-stage regulator or dummy load to prevent the output voltage from rising in such situations. However, because post-stage regulators or dummy loads will cause cost increase and efficiency reduction, they are not sufficiently attractive, especially in recent years for the no-load and/or standby input power consumption in a variety of consumer applications. With more and more stringent regulatory requirements, this design began to be ignored.
The active shunt regulator shown in Figure 3 can not only solve the voltage regulation problem, but also minimize the cost and efficiency impact.
