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SMT & SMD Power Inductor Specifications

 

The powder. Material of core

1. Ferrite powder
  • (1.) Mn-Zn, ferrite core
    For large current, switching mode power supply. The working Freq.: Less than 1MHz.
    TSL, TSS Types
  • (2.) Ni-Zn, ferrite core
    TSB, TDR
    The performance is good when frequency is more than 1MHz
    The notebook PC LCD inverter should use 4 pieces of TDR. Every kind of inverter of LCD panel back light should should use at least 1 piece of non shielded type (TDR)
    The notebook PC converter should use 2 pieces of shielded types (TSB) and 2 pieces of non-shielded types (TDR).

2. Ceramic

  • For high frequency, the IDC is low. It is used on RF. The SRF, Q should be very high at the frequency. (RF: Radio Frequency)
    HCI - For example: mobile phone, blue tooth, and wireless instruments should use them as the filter or resonator.

3. Metal powder (Iron power, MPP, Amorphous, ...)

  • For very high current power inductors, its IDC could be very high. The inductance value would be very low. CPU & CPS. they would be used on the new generation CPU (P4) or the newer one.
    A photocopier would use 2 to 4 pieces of this kind of inductors.
    The mobile phone base station should use many pieces on the control board, add-on board.
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