Small size, high energy storage density and low DC resistance.Here the demands are often counteractive: Once the required values for inductance L and inductor currents are calculated, you select a power inductor with the minimum possible DC resistance. Unfortunately, this is not a standard value for power inductor data sheet specifications and often leads to misinterpretation among users. – here self-heating of +40☌ is common at the nominal current.Īccording to semiconductor manufacturers‘ recommendations, the saturation current is the point at which the inductance value has fallen by 10 %. The nominal current for power inductors is usually linked to the specified self-heating with Please observe the definitions for the data sheet specifications. Maximum coil current: Imax = 2 x IN DESIGN TIP 3:
Besides the switching frequency, it is therefore an important parameter for minimising the power loss of the power inductor. The ripple current is essential in determining the core losses. lower inductance – higher ripple current higher inductance – smaller ripple current
The following approach can be chosen as a rough calculation: DESIGN TIP 2: The current load for power inductors can be calculated very accurately in terms of DC current load and ripple current load (core losses) using the manufacturers’ simulation software. Switching frequency 1000 kHz: Ferrite, WE-PERM This leads to the following recommendations: DESIGN TIP 1: First generation regulators operated in the range 30kHz to 55kHz. The switching frequency of typical converter ICs on the market is in the range 100 kHz to 2 MHz. A practical guide for the selection of power inductors for DC/DC converters
Wise words from Würth Power Inductors : 8 Design Tips This part looks like maybe a good candidate for a 24V flyback supply 5A 6 examples Otherwise please learn more design methodologies which includes tradeoffs for optimal performance in EMI, efficiency, cost complexity, stability and learning curve. (Your lack of design specs was the tell for me to suggest this) I suggest this may be a steep learning curve for now and you might not have the time to learn well enough to succeed the 1st time. items do not appear to include your input range. Note: 50V Wurth does make HV transformers for these, but efficiency is better with a smaller input voltage range, so std. You have some homework to define unstated assumptions into a design type (presumably some kind of flyback, DCM, Boundary mode, Quasi-Resonant).
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