Microchip PAC1934四路DC电源监视器解决方案

Microchip公司的PAC1934是带有累加器的四路DC电源/能量监视器,具有总线电压监视器和电流检测放大器,数字电路进行功率计算和能量累加.工作电压 2.7V - 5.5V,监测周期从1ms到36小时或更长,总线电压,检测电阻电压和累加比例功率存储在寄存器,功率测量精度1%,主要应用在笔记本和平板计算,网络,汽车,云计算,Linux和服务器计算,工业和Linux应用.本文介绍了PAC1934主要特性,框图和系统框图,功能框图以及四路DC电源监视器评估板ADM00805主要特性,电路图,材料清单和PCB设计图.
The PAC1934 device is a four-channel energy monitor, with bus voltage monitor and current sense amplifiers that feed high-resolution ADCs. Digital circuitry performs power calculations and energy accumulation.
This enables energy monitoring with integration periods from 1 ms up to 36 hours or longer. Bus voltage, sense resistor voltage and accumulated proportional power are stored in registers for retrieval by the system master or Embedded Controller.
The sampling rate and energy integration period can be controlled over SMBus or I2C. Active channel selection, one-shot measurements and other controls are also configurable by SMBus or I2C.
The PAC1934 uses real time calibration to minimize offset and gain errors. No input filters are required for this device.
PAC1934主要特性:

• High-Side Current Monitor
- 100 mV full scale range for current sense voltage,16b resolution default setting
- Selectable bidirectional current sense capability,
–100 mV to +100 mV range, 16-bit two’s complement (signed) data format
- External sense resistor sets full scale current range
- Very low input current simplifies routing
• Wide Bus Voltage Range for Voltage Monitor
- 0V to 32V input common-mode voltage
- 16-bit resolution for voltage measurements, 14b are used for power calculations
• Real Time Auto-Calibration of Offset and Gain Errors for Voltage and Current, No User Adjustment Required
• 1% Power Measurement Accuracy over a Wide Dynamic Range
• On-Ch...