在电源供电系统中,浪涌的产生会对电子元器件造成不可逆的损害。电源开断瞬息产生的强力尖峰脉冲会对集成电路进行浪涌冲击。本文就浪涌电压冲击对电路造成的损害,通过理论和实验分析了TVS实际选型问题,并对比分析了TVS电路和电容电路...在电源供电系统中,浪涌的产生会对电子元器件造成不可逆的损害。电源开断瞬息产生的强力尖峰脉冲会对集成电路进行浪涌冲击。本文就浪涌电压冲击对电路造成的损害,通过理论和实验分析了TVS实际选型问题,并对比分析了TVS电路和电容电路对浪涌冲击带来的失效问题的抑制能力,在此基础上提出了基于TVS和电容的浪涌保护电路方案。In the power supply system, the generation of surge will cause irreversible damage to electronic components. The strong spike pulse produced by the instant of power supply disconnection will cause surge impact to the integrated circuit. In this paper, based on the damage caused by surge voltage shock to the circuit, the actual TVS selection problem is analyzed through theory and experiment, and the suppression ability of TVS and capacitor circuit to the failure problem caused by surge shock is compared and analyzed. On this basis, the surge protection circuit scheme based on TVS and capacitor is proposed.展开更多
一种带断线检测功能的开关量输出电路由总线控制电路、开关CBB电路、过流检测与保护电路、在线断线检测电路、离线断线检测电路组成。总线控制电路控制开关模块,对电路内部测试点检测回采输出;开关CBB电路产生开关信号并驱动负载;过流...一种带断线检测功能的开关量输出电路由总线控制电路、开关CBB电路、过流检测与保护电路、在线断线检测电路、离线断线检测电路组成。总线控制电路控制开关模块,对电路内部测试点检测回采输出;开关CBB电路产生开关信号并驱动负载;过流检测与过流保护电路通过调整限流电阻控制电流大小;在线断线检测电路由电流型放大器和限流电阻完成检测;离线断线检测电路用来检测负载是否连接。该电路用于控制电磁线圈的通断电状态,能在恶劣的环境下稳定地运行,具有重要的工程实际应用价值。A switch output circuit with wire breakage detection function consists of a bus control circuit, a switch CBB circuit, an overcurrent detection and protection circuit, an online wire breakage detection circuit, and an offline wire breakage detection circuit. The bus control circuit controls the switch module to detect and extract output from internal test points in the circuit. The switch CBB circuit generates a switch signal and drives the load. The overcurrent detection and overcurrent protection circuit controls the current magnitude by adjusting the current limiting resistor. The online wire breakage detection circuit is completed by a current-type amplifier and a current-limiting resistor for detection. The offline wire breakage detection circuit is used to detect whether the load is connected. This circuit is used to control the on/off state of electromagnetic coils, which can operate stably in harsh environments, with important practical engineering application value.展开更多
文摘在电源供电系统中,浪涌的产生会对电子元器件造成不可逆的损害。电源开断瞬息产生的强力尖峰脉冲会对集成电路进行浪涌冲击。本文就浪涌电压冲击对电路造成的损害,通过理论和实验分析了TVS实际选型问题,并对比分析了TVS电路和电容电路对浪涌冲击带来的失效问题的抑制能力,在此基础上提出了基于TVS和电容的浪涌保护电路方案。In the power supply system, the generation of surge will cause irreversible damage to electronic components. The strong spike pulse produced by the instant of power supply disconnection will cause surge impact to the integrated circuit. In this paper, based on the damage caused by surge voltage shock to the circuit, the actual TVS selection problem is analyzed through theory and experiment, and the suppression ability of TVS and capacitor circuit to the failure problem caused by surge shock is compared and analyzed. On this basis, the surge protection circuit scheme based on TVS and capacitor is proposed.
文摘一种带断线检测功能的开关量输出电路由总线控制电路、开关CBB电路、过流检测与保护电路、在线断线检测电路、离线断线检测电路组成。总线控制电路控制开关模块,对电路内部测试点检测回采输出;开关CBB电路产生开关信号并驱动负载;过流检测与过流保护电路通过调整限流电阻控制电流大小;在线断线检测电路由电流型放大器和限流电阻完成检测;离线断线检测电路用来检测负载是否连接。该电路用于控制电磁线圈的通断电状态,能在恶劣的环境下稳定地运行,具有重要的工程实际应用价值。A switch output circuit with wire breakage detection function consists of a bus control circuit, a switch CBB circuit, an overcurrent detection and protection circuit, an online wire breakage detection circuit, and an offline wire breakage detection circuit. The bus control circuit controls the switch module to detect and extract output from internal test points in the circuit. The switch CBB circuit generates a switch signal and drives the load. The overcurrent detection and overcurrent protection circuit controls the current magnitude by adjusting the current limiting resistor. The online wire breakage detection circuit is completed by a current-type amplifier and a current-limiting resistor for detection. The offline wire breakage detection circuit is used to detect whether the load is connected. This circuit is used to control the on/off state of electromagnetic coils, which can operate stably in harsh environments, with important practical engineering application value.