DC-DC CONVERTER

• Main Author: SATO KYOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 14.09.2023
• 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

To provide a DC-DC converter that operates with stability without increasing a power loss and a circuit scale, in a bi-directional converter that is in a no-load/light-load state.SOLUTION: A DC-DC converter that functions as a bi-directional converter, comprises: a plurality of synchronous rectification type chopper circuits; and a control circuit that includes a plurality of PWM circuits each outputting a gate drive signal to each switching element of the chopper circuits on the basis of an output of an error amplifier. The control circuit makes at least one chopper circuit perform a power-run operation and adds a predetermined offset voltage to the output of the error amplifier only for a PWM circuit that outputs the gate drive signal to the chopper circuit that performs the power-run operation so that at least one or more remaining chopper circuits perform a regenerative operation.SELECTED DRAWING: Figure 2 【課題】無負荷／軽負荷の状態の双方向コンバータにおいて、電力損失を増やすことなく、かつ回路規模を増大させることなく安定動作するＤＣ－ＤＣコンバータを提供する。【解決手段】双方向コンバータとして機能するＤＣ－ＤＣコンバータであって、複数の同期整流型のチョッパ回路と、エラーアンプの出力に基づいて前記チョッパ回路の各々のスイッチング素子にゲートドライブ信号を出力する複数のＰＷＭ回路を含む制御回路とを備え、前記制御回路は、少なくとも１つのチョッパ回路を力行動作とし、残りの少なくとも１つ以上のチョッパ回路が回生動作を行うように、力行動作を行うチョッパ回路にゲートドライブ信号を出力するＰＷＭ回路にのみ、前記エラーアンプの出力に所定のオフセット電圧を加える。【選択図】図２