The ferrite magnetic amplifier in the Flyback Power Supply Circuit Board Gerber File Cloning is for dual output flyback power supplies that both provide actual power at both output ends (5V 2A and 12V 3A), both of which can achieve ±5% adjustment. When the voltage reaches 12V, it will enter a zero-load state and can’t be adjusted within the 5% limit.
The ferrite magnetic amplifier in the Flyback Power Supply Circuit Board Gerber File Cloning
A linear regulator is a feasible solution, but it is still not an ideal solution due to its high price and reduced efficiency.
Our proposed solution is to use a magnetic amplifier at the 12V output, even the flyback topology can be used in order to reduce costs, it is recommended to use ferrite magnetic amplifiers in the Flyback Power Supply PC Board reverse engineering.
However, the control circuit of the ferrite magnetic amplifier is different from the control circuit of the traditional rectangular hysteresis loop material (high permeability material).
The ferrite control circuit (D1 and Q1) can absorb current to maintain power at the output. This circuit has been thoroughly tested.
The transformer winding is designed for 5V and 13V output. This circuit can achieve 12V output ± 5% adjustment, and can even reach input power less than 1W (5V 300 mW and 12V zero load).
