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What are the top ten parameters of network transformers?

Views : 95
Author : CETUS INTL
Update time : 2023-07-27 11:07:38
Regarding electronic products, what is the data that everyone cares about most? Undoubtedly, we must look at its parameters to judge whether the match meets our needs. Here, we share 10 parameters of the network transformer, an electronic product accessory for routers.


1. Open circuit inductance (OCL): 
Open Circuit Inductance.
2. Leakage inductance: 
Leakage Inductance, related to the transformer coupling coefficient, (depending on the winding technology and core).
3. Interwinding Capacitance: Interwinding Capacitance. A small value will have no effect on the transformer signal, but a large value will provide a low-impedance path for common-mode currents, which will have adverse effects.
4. DC resistance: DC Resistance.
5. Transformer transformation ratio: Turn Ratio, primary and secondary coil turns ratio.
6. Insertion loss dB: Insertion Loss=20Xlog(V1/V2), where V1 is the level of the output terminal after inserting the transformer, and V2 is the level of the output terminal when the transformer is not inserted. This parameter is used to measure the impact on the transmission signal after inserting the transformer, the smaller, the better. Generally, it refers to the relationship curve between the signal attenuation degree of the network transformer and the signal frequency.
7. Return loss dB: Return Loss, which measures the relationship between the system impedance mismatch and the signal frequency after the network transformer is inserted Return Loss=20Xlog(Vr/Vi), where Vr is the reflected signal amplitude, and Vi is the incident signal amplitude .
8. Crossover interference dB:
Cross Talk, the ratio of the signal V1 in one of the two unit circuits to the signal V2 induced in the other unit circuit Cross Talk =20Xlog(V2/V1).
9. Common mode rejection ratio dB: CMRR=20Xlog(Vout/Vin), the ratio of the common mode interference signal amplitude Vin at the input end of the network transformer to the common mode interference signal amplitude Vout at the output end.
10. Isolation level: Isolation HOT-POT, electrical isolation level.

The above is a brief description of the ten parameters of the network transformer. When purchasing a network transformer product, you can properly judge whether the product meets the needs according to the parameters.