Title:
POWER SUPPLY
Document Type and Number:
Japanese Patent JP3490566
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accomplish equalization of voltage allocated to DC-DC converters without individually adjusting the voltage reference value of each of the DC-DC converters.
SOLUTION: Each of DC-DC converters 111-11n individually converts input direct-current voltage VIN to alternating-current voltage through the on/off control of an inverter A1. The alternating-current voltage is multiplied by a transformer A2, and then converted through a filter A3 into direct-current voltage, which is then output. In addition, the primary current of the transformer A2 is detected by means of a current detector A4, and the inverter A1 is PWP- controlled through a control circuit A5 based on the detected current. The output voltages of the converters 111-11n are added up though diodes 121-12n to obtain a required voltage VOUT. Their output currents are detected by the current detector A4, and error voltages relative to a reference voltage are found from the detected voltages using an error amplifier 15. Thus the inverter A1 for each of the DC-DC converters 111-11n is PWM-controlled in common.
Inventors:
Sumio Kotani
Eiichi Shibano
Hiroshi Iwanaga
Fujio Sudo
Eiichi Shibano
Hiroshi Iwanaga
Fujio Sudo
Application Number:
JP8112696A
Publication Date:
January 26, 2004
Filing Date:
April 03, 1996
Export Citation:
Assignee:
KDDI CORPORATION
Toshiba Corporation
Toshiba Corporation
International Classes:
H02J3/38; H02M3/28; H02M7/06; H02M7/48; (IPC1-7): H02M3/28; H02J3/38; H02M7/06; H02M7/48
Domestic Patent References:
| JP7219651A | ||||
| JP7135773A | ||||
| JP7264847A | ||||
| JP7312867A |
Attorney, Agent or Firm:
Takehiko Suzue