Datasheet

Application Note
Created by Traco Electronic AG Arp. www.tracopower.com Date: July 5
th
, 2012 / Rev.: 2.0 / Page 39 / 44
3W SINGLE & DUAL
EMCconsiderations
Suggested Schematic to comply with EN55022 Conducted Noise Class B
Recommended PCB Layout with Input Filter
To: comply with EN55022 CLASS B following components are needed:
For THL 3-24xxWI
Component Value Voltage Reference
C1&C2 10µF 50V
1812/Y5V
C3&C4
470pF 2KV 1808/X7R
L1
27µH SCD0403T/0.71A
For THL 3-48xxWI
Component Value Voltage Reference
C1&C2 1µF 100V
1812/X7R
C3&C4
2200pF 2KV 1808/X7R
L1
88µH SCD0403T/1.42A
+Vout
+Vin
-Vin
-Vout
Load
C1
+ INPUT
- INPUT
C2
L1
C4
C3