For high-voltage output, the RFI screen can be installed between the output
rectifier and their radiator. If the secondary voltage is low, such as 12V or
lower, the secondary transformer RFI shielding and rectifier shielding are not
required.
By placing an output filter choke on the loop to protect the diode heat
sink from RF voltage, the need for electrostatic shielding by the output
rectifier diode can be eliminated. Typical examples are shown in Figure 1 and
Figure 2.
If the heat sinks of the diodes and transistors are completely isolated
from the case, as they are mounted on a PCB, electrostatic shielding is not
necessarily required on these components.
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