Claims
- 1. A multi-output switching regulator having a magnetic amplifier comprising a saturable reactor, wherein said saturable reactor has a magnetic core made of an Fe-based soft-magnetic alloy comprising as essential alloying elements Fe, Cu and M, wherein M is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, and having an alloy structure at least 50% in area ratio of which being fine crystalline particles having an average particle size of 100 nm or less, said magnetic core having, when measured at a core temperature of 25° C. using a 50 kHz monopolar rectangular voltage with an on-duty ratio of 0.5, control magnetizing properties of:0.12 T or less of a residual operating magnetic flux density ΔBb; 2.0 T or more of a total control operating magnetic flux density ΔBr; and 0.10-0.20 T/(A/m) of a total control gain Gr calculated by the equation: Gr=0.8×(ΔBr−ΔBb)/Hr wherein Hr is a total control magnetizing force defined as a control magnetizing force corresponding to 0.8×(ΔBr−ΔBb)+ΔBb.
- 2. The multi-output switching regulator according to claim 1, wherein said multi-output switching regulator comprises:a primary circuit comprising an input power source, a switching element and a primary winding of a main transformer; and a secondary circuit comprising a main output circuit for controlling a main output by a pulse-width controlling operation of said switching element and a secondary output circuit comprising said magnetic amplifier for controlling a secondary output, said main output circuit and said secondary output circuit being respectively connected to the same secondary winding of said main transformer.
- 3. The multi-output switching regulator according to claim 2, wherein an output voltage of said main output is +5V and an output voltage of said secondary output is +3.3V.
- 4. The multi-output switching regulator according to claim 1, wherein a switching frequency is 30-150 kHz.
- 5. A computer equipped with the multi-output switching regulator according to claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9-261725 |
Sep 1997 |
JP |
|
Parent Case Info
This is a Divisional of Application No. 09/159,648 filed Sep. 24, 1998, now U.S. Pat. No. 6,270,592 , the disclosure of which is incorporated herein by reference.
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