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发明公开
CN109217262A 一种大功率开关放大器中MOS管驱动欠压保护电路 有权

一种大功率开关放大器中MOS管驱动欠压保护电路
摘要：
本发明涉及一种大功率开关放大器中MOS管驱动欠压保护电路，电路中供电电源V1一端接地，供电电源V1另一端接晶体管Q4的集电极，数字光电耦合器U1的1端口经电阻R10接电压表V2，电压表V2接数字光电耦合器U1的3端口，数字光电耦合器U1的5端口接晶体管Q4的集电极，同时数字光电耦合器U1的5端口经电阻R7接电阻R11，数字光电耦合器U1的4端口接晶体管Q6的基极，晶体管Q6的集电极接电阻R11，晶体管Q6的发射极接地，电阻R1接晶体管Q2的基极，同时电阻R1经电阻R2接二极管D1，本发明设计的一种大功率开关放大器中MOS管驱动欠压保护电路成本低、功耗低、可靠性高、安全可靠。
摘要（英）：

A MOS transistor-driven undervoltage protection circuit in a high-power switch amplifier At one end of that pow supply V1 in the circuit, At that other end of the pow supply V1 is connected to the collector of the transistor Q4, The 1 port of the digital optocoupler U1 is connected to a voltmeter V2 through a resistor R10, Voltmeter V2 is connected to port 3 of digital optocoupler U1, the 5-port of the digital photocoupler U1 is connected to the collector of the transistor Q4, At the same time, the five ports of the digital photoelectric coupler U1 are connected to a resistor R11 through a resistor R7, the 4-port of the digital photocoupler U1 is connected to the base of the transistor Q6, The collector of the transistor Q6 is connected to the resistor R11, the emitter of the transistor Q6is grounded, the resistor R1 is connected to the base of the transistor Q2, and the resistor R1 is connected to the diode D1 through the resistor R2. The MOS transistor driving under-voltage protection circuit in the high-power switching amplifier designed by the invention has the advantages of low cost, low power consumption, high reliability, safety and reliability.

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