Microchip PAC1942-2带累加器多路电源监视器解决方案

Microchip公司的PAC194x系列是一路,两路,三路和四路能量监视器,具有总线电压监视器和电流检测放大器,提供给高分辨率ADC.系列有两个版本PAC194X: PAC194X-1器件是用于高边电流检测,而PAC194X-2器件用于低边电流检测或浮动VBUS应用.数字电路进行功率计算和能量累加.这使得能量监视具有综合周期多达一年或更多.总线电压,检测电阻电压和正比于功率累加存储在寄存器,并由主系统或嵌入控制器进行检索. PAC194X系列具有一组数字比较器,允许用户检测每路超过用户可编程限值的过压/欠压,过流/欠流和过功率数值,以产生超过阈值时的ALERT.器件具有用于电流检测电压的100mV满刻度范围(FSR),16位分辨率用于电流测量,可编FSR从-50mV到+50mV,外部检测电阻设定满刻度电流范围,非常低输入电流简化了选择途径.电压监视器具有宽VBUS范围,0V到9V FSR.16位分辨率用于电压测量,4.5V可编程VBUS选择,宽动态范围的功率测量精度为1%,片上累加30位功率用于能量测量,用户可编程取样速率为8, 64, 256和1024 SPS,突发模式的单路取样为5120SPS.工作电压2.7V到5.5V.主要用在嵌入计算,网络,FPGA系统,低压/大功率AI和GPU,工业, Linux®应用,笔记本电脑和平板电脑,云计算,Linux和服务器计算以及光学网络模块.本文介绍了PAC1942-2主要特性, PAC194X-1和PAC194X-2功能框图,典型应用电路以及PAC1942-2评估板(EV97L33A)主要特性,电路图,材料清单和PCB设计图.

The PAC194X products are one, two, three and four-channel energy monitors, with bus voltage monitors and current sense amplifiers that feed high-resolution ADCs. There are two versions of the PAC194X: the PAC194X-1 devices are for high-side current sensing and the PAC194X-2 devices are for low-side current sensing or floating VBUS applications.

Digital circuitry performs power calculations and energy accumulation. This enables energy monitoring with integration periods up to one year or longer. Bus voltage, sense resistor voltage and accumulated proportional power are stored in registers for retrieval by

the system host or embedded controller. The PAC194X devices have a set of digital comparators that allow the user to detect over/undervoltage, over/undercurrent and overpower against user programmed limits for ea...