STP - HIGH POWER CHOKES FOR EMC DC/DC CONVERTERS

Graphs:

• Typical Inductance Values vs DC BIAS:

Notes : Inductance measured at @100kHz/100mVac.

•  Typical performances versus temperature:

Notes : Inductance measured at @100kHz/100mVac.

• Core Losses vs Frequency and Ripple Currents:

Notes : Total core losses estimated at given conditions. Losses includes core , copper losses and all the second order losses as eddy currents on copper and skin effect. DC currents according nominal values. 

• Typical Inductance Values vs DC BIAS:

Notes: Estimated core losses for the core material. The losses are presented for different current ripple on the choke, referred to nominal values, and for operation temperature of 25 and 100 ºC.

Notes : Estimated core losses for the core material. The losses are presented for different current ripple on the choke, referred to nominal values, and for operation temperature of 25 and 100 ºC.

• Impedance vs Frequency:

Notes: Series Impedance

• Thermal Behavior:

The final temperature of the magnetic will depend on the total power losses being dissipated on the chokes. As a first approximation, the rise temperature expected can be estimated using the formula as per below:

Where: P is total power losses expected according above core data and given conditions, in mW.
S is a constant depending on magnetic morphology, use 22 for STP-02 and 08. Use 27,5 for STP-14.
The result will give the estimated temperature rise.