Fig.1 shows external noise filter which reduce the line conducted noise for DC-DC converter.
Fig.1 Example of noise filter
| No. | Parts No. | Components | Note |
|---|---|---|---|
| 1 | C1 | Ceramic capacitor | Low impedance (recommended value: 4.7uF) |
| 2 | C2 | Electrolytic capacitor | Low impedance (please see instruction manual on catalogue) |
| 3 | C3 | Ceramic capacitor | Low impedance (recommended value: 4.7uF) |
| 4 | C4 | Ceramic capacitor | Low impedance (recommended value: 1000pF) |
| 5 | L1 | Common mode coil | High leakage inductance (recommended: main 14mH, leakage 240uH) |
The wiring method, the component's location or some other conditions are effect on line conducted noise. Please evaluate under end-use condition before using.
- * Please consider about C4. The permeation noise from input to output will be increased by C4.
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