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[原创]Maxim MAX14919工业保护四路低边开关解决方案

关键词:工业控制 PLC Maxim MAX14919

时间:2021-01-28 13:35:48       来源:中电网

Maxim公司的MAX14919是工业保护四路低边开关,每路的开态电阻(RON)典型值为140mΩ,集成了±1kV/42Ω浪涌保护,用于鲁棒应用.电阻设定的精确限流提供保证的工作电流100mA到800mA.输出可以并联以得到更高的负载电流.四个开关是引脚控制,既简单而开关速度可高达200kHz.器件具有反向电流检测以避免负载电源接线错误所引起的危害.由于采用了内部高压钳.电感负载能迅速关断.开关还具有短路和过载保护.器件的工作电压从5V/7V到60V,每个输出的负载电流为800A,集成了5V/30mA线性稳压器,5V-48V负载电压范围,电源负载电流1.7mA,浪涌保护为±1kV/42Ω, 8μs/20μs,工作温度-40C到+125C.主要用在工业数字输出,继电器和磁性线圈驱动器,PLC和DCS系统.本文介绍了MAX14919主要优势和特性,功能框图,应用框图以及评估板MAX14919 EVK主要特性,框图,电路图,材料清单和PCB设计图.

 

The MAX14919 industrial-protected quad-channel lowsideswitch features140mΩ (typ) on-resistance (RON) perchannel with integrated ±1kV/42Ω surge protection for robustoperation.

Resistor-settable accurate current limiting provides guaranteedoperating currents in the range of 100mA to800mA. Loads that draw large activation or inrush currentsare supported using the 2x inrush load-current option. Theoutputs can be connected in parallel to achieve higherload currents. The four switches are pin-controlled to allowfor simple and fast switching of up to 200kHz.

The device features reverse-current detection for preventingdamage against load supply miswiring faults. Inductiveloads are turned off rapidly using the internal high-volta..

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