SWITCHING POWER SUPPLY DEVICE

• Main Authors: ITOHARA KEITA, TSURUYAMA MOTONORI
• Format: Patent
• Language: English; Japanese
• Published: 15.06.2023
• 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 switching power supply device capable of achieving high efficiency even when there are variations in the characteristics of components.SOLUTION: A control unit (CNT1) of a switching power supply device (1A) has a first state in which a first switch (SW1) is switched on and a second switch (SW2) is switched off, a second state in which the first switch is off and the second switch is on, a third state in which the first and second switches are off, and a fourth state in which a voltage at a connection node of the first and second switches is lower than in the third state. The control unit repeats the first state, the second state, the third state, and the fourth state, and a dead time period during which the first and second switches are switched off is provided between the fourth and first states, so that length of the fourth state is adjusted.SELECTED DRAWING: Figure 1 【課題】部品の特性にばらつきがある場合でも高効率化を図ることができるスイッチング電源装置を提供する。【解決手段】スイッチング電源装置（１Ａ）の制御部（ＣＮＴ１）は、第１スイッチ（ＳＷ１）をオン、第２スイッチ（ＳＷ２）をオフにする第１状態と、第１スイッチをオフ、第２スイッチをオンにする第２状態と、第１，２スイッチをオフにする第３状態と、第３状態よりも第１，２スイッチの接続ノードの電圧を低くする第４状態と、を有する。前記制御部は、前記第１状態、前記第２状態、前記第３状態、及び前記第４状態を繰り返し、第１，２スイッチをオフ状態にするデッドタイム期間を前記第４状態と前記第１状態との間に設け、前記第４状態の長さを調整する。【選択図】図１