The above is an example of a general circuit for an AC/DC converter and a DC/DC converter.
(1) Safety Certified capacitors are required for AC line filters (C1, C2) and coupling capacitors (C3) in primary and secondary coupling.
Our new products rated at AC 400 V and AC 500 V are suitable for AC 400-V and AC 690-V AC/DC converters.
(2) Low-loss capacitors are required for snubber capacitors (C5, C6), since high-frequency switching is applied.
Accordingly, temperature compensation-type (Class 1) capacitors are recommended.
On the other hand, for C7, high capacity is required since high frequency noise components must be removed. For this, high dielectric constant (Class 2) capacitors are recommended.
(3) Relatively large-capacity capacitors are required for smoothing capacitors (C4, C8) to remove low-frequency noise.