The protection circuit according to the present invention is for a DC-DC converter including: a step-down switch connected between a voltage input terminal and a first node and controlled by a switching period and a duty cycle of a switching signal; a step-down inductor connected between the first node and a voltage output terminal; a step-down capacitor connected between the voltage output terminal and ground; and a step-down diode connected between the second node and the ground. The protection circuit is connected to the first node, the second node and ground. When the step-down switch is switched between an on state and an off state according to the switching signal, the protection circuit is configured to provide a protection voltage between the first node and the ground such that a voltage stress of the step-down switch is less than an input voltage provided between the voltage input terminal and the ground.

    根据本发明的保护电路用于DC‑DC转换器,该DC‑DC转换器包括:降压开关,其连接在电压输入端子和第一节点之间,并且由开关信号的开关周期和占空比控制;降压电感器,其连接在所述第一节点与电压输出端子之间;降压电容器,其连接在电压输出端子和地之间;以及降压二极管,其连接在第二节点和地之间。保护电路连接到第一节点、第二节点和地。当降压开关根据开关信号在导通状态和断开状态之间切换时,保护电路被配置为在第一节点和地之间提供保护电压,使得降压开关的电压应力小于在电压输入端子和地之间提供的输入电压。


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    Title :

    Protection circuit, DC-DC converter, battery charger, and electric vehicle


    Additional title:

    保护电路、DC-DC转换器、电池充电器和电动车辆


    Contributors:

    Publication date :

    2023-02-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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