Title:
SWITCHING POWER SUPPLY
Document Type and Number:
Japanese Patent JP3523091
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a switching power supply which can control the output stably at any load from no load to full load by eliminating the instability of the output stabilizing control caused by the charge and discharge current deter mined by the electrostatic capacity of a main switching element.
SOLUTION: This equipment is provided with a MOSFET Q10 as a switching element for turning on and off the current in a primary winding of a transformer T, a rectifying and smoothing circuit for rectifying and smoothing the induced voltage in a secondary winding of the transformer T, and a stabilization control circuit for controlling the current in the MOSFET Q10 according to the output voltage of the rectifying and smoothing circuit. A current detector DT for detecting the current in the MOSFET Q10 is inserted between one end of the primary winding which is not connected to the MOSFET Q10 and a DC power supply or between the primary winding and the MOSFET Q10.
Inventors:
Imai, Katsunori
Masuoka, Hironobu
Hanabusa, Kazuyoshi
Masuoka, Hironobu
Hanabusa, Kazuyoshi
Application Number:
JP31999298A
Publication Date:
April 26, 2004
Filing Date:
October 23, 1998
Export Citation:
Assignee:
TDK CORP
International Classes:
H02M3/28; H02M3/335; (IPC1-7): H02M3/28; H02M3/335
Attorney, Agent or Firm:
ζδΊ ι
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