78M6631-IM Ver la hoja de datos (PDF) - Maxim Integrated

Número de pieza

componentes Descripción

Fabricante

78M6631-IM

3-Phase Power Measurement IC

Maxim Integrated 

DS_6631_056

78M6631 Data Sheet

1 Hardware Functional Description

1.1 Hardware Overview

The Teridian 78M6631 single-chip power measurement and monitoring device integrates all the primary

AC measurement and control blocks required to implement the 3-phase power measurement and

monitoring system.

The 78M6631 includes:

• Six input analog front-end (AFE) (3 Differential Current/3 Voltage)

• Independent digital computation engine (CE)

• 8051-compatible microprocessor (MPU) which executes one instruction per clock cycle (80515)

• Precision voltage reference

• Temperature sensor

• RAM and flash memory

• A variety of I/O pins

• Communication Interfaces: UART, SPI, and I2C (Master)

Various current sensor technologies are supported including Current Transformers (CT), Resistive

Shunts, and Rogowski coils.

The 32-bit compute engine (CE) of the 78M6631 sequentially process the samples from the analog inputs

on pins IA, IB, IC, VA, VB, and VC and performs calculations to measure active power (Watts), reactive

power (VARs), apparent power (VAs), power factor, fundamental power, and harmonic power for three

independent phases. RMS, fundamental, and harmonic currents and voltages are also computed for each

phase. Totals are available for most results.

Figure 1 provides a block diagram of the 78M6631 IC. A detailed description of the various functional

blocks follows.

Refer to the applicable Firmware Description Document for additional supported functionality.

Rev 1

5

Share Link: