POWER SUPPLY DEVICE

• Main Authors: HONMA KAZUKI, EJIRI TAKESHI
• Format: Patent
• Language: English; Japanese
• Published: 03.08.2015
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide a power supply device capable of performing the multistage control of a load while using a constant voltage IC.SOLUTION: In a constant voltage IC 11, a feedback voltage Vfb obtained by dividing an output voltage Vout is fed back, and an output voltage Vout based on the feedback voltage Vfb is output. Control means 30 switches a voltage dividing ratio of a voltage dividing circuit 20, thereby outputting a first feedback voltage Vfb1 and a second feedback voltage Vfb2, which are periodically switched, to the constant voltage IC 11. The constant voltage IC 11 periodically outputs a first output voltage V1 and a second output voltage V2 on the basis of the first feedback voltage Vfb1 and the second feedback voltage Vfb2 which are input. 【課題】定電圧ＩＣを用いつつ、負荷を多段階制御可能な電源装置を提供する。【解決手段】定電圧ＩＣ１１が出力電圧Ｖｏｕｔを分圧したフィードバック電圧Ｖｆｂをフィードバックし、このフィードバック電圧Ｖｆｂに基づいた出力電圧Ｖｏｕｔを出力し、制御手段３０は、分圧回路２０の分圧比を切り替えることで、定電圧ＩＣ１１に対して第一のフィードバック電圧Ｖｆｂ１と第二のフィードバック電圧Ｖｆｂ２とを周期的に切り替えて出力し、定電圧ＩＣ１１が入力した第一のフィードバック電圧Ｖｆｂ１と第二のフィードバック電圧Ｖｆｂ２に基づき第一の出力電圧Ｖ１と第二の出力電圧Ｖ２を周期的に出力する。【選択図】図１