PAC193x Multi-Channel DC Power Monitors

Microchip's multi-channel DC power and energy monitors with integrated accumulator

The PAC193x from Microchip Technology are two-, three-, and four-channel power and energy monitoring devices. The PAC1932 device is a dual power and energy monitor that reports on bus and sense voltage 16-bits of resolution. PAC1933 is a three-channel power monitor and energy monitor that reports on bus voltage and sense voltage 16-bits of resolution and the PAC1934 is a four-channel power/energy monitor with current sensor amplifier and bus voltage monitors that feed high-resolution ADCs. Digital circuitry performs power calculations and energy accumulation. A high-voltage multiplexer sequentially connects the inputs to a bus voltage monitor and current sense amplifier 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 PAC1932/3/4 devices use real-time calibration to minimize offset and gain errors. No input filters are required for this device. The rich feature set of the PAC193x makes them ideal for networking, automotive, WIN10 laptop workstations, cell phones, and IoT applications.