Maxim Integrated Products announced the 78M6613 – a highly integrated IC for simplified implementation of single-phase AC power measurement into power supplies, smart appliances, and other applications with embedded AC load monitoring and control. It is packaged in a small, 5mm x 5mm, 32-pin QFN package for optimal space savings.
At the measurement interface, the device provides four analog inputs for interfacing to voltage and current sensors. Voltages from the sensors are fed to our Single Converter Technology® that uses a 22-bit delta-sigma ADC, independent 32-bit compute engine (CE), digital temperature compensation, and precision voltage references to provide better than 0.5% power measurement accuracy over a wide 2000:1 dynamic range.
The integrated MPU core and 32KB of flash memory provides a flexible means of configuration, post-processing, data formatting, and interfacing to any host processor through the UART interface and/or DIO pins. Complete application firmware is available from Maxim and can be preloaded into the IC during manufacturing test. Alternatively, a complete array of ICE, development tools, and programming libraries are available to allow customization for each application.
An evaluation kit is available: 78M6613-PSU-1 78M6613-EVM-1
Key Features
- < 0.5% Wh Accuracy Over Wide 2000:1 Current Range and Over Temperature
- Voltage Reference < 40ppm/°C
- Four Sensor Inputs—V3P3A Referenced
- 22-Bit Delta-Sigma ADC with Independent 32-Bit Compute Engine (CE)
- 8-Bit MPU (80515), One Clock Cycle per Instruction with 2KB MPU XRAM
- 32KB Flash with Security
- Integrated In-Circuit Emulator (ICE) Interface for MPU Debug
- 32kHz Time Base with Hardware Watchdog Timer
- UART Interface and Up to 10 General-Purpose 5V Tolerant I/O Pins
- Packaged in a RoHS-Compliant (6/6) Lead(Pb)-Free, 32-Pin QFN (5mm x5mm)
- Complete Application Firmware Provides:
- True RMS Calculations for Current, Voltage, Line Frequency, Real Power, Reactive Power, Apparent Power, and Power Factor
- Accumulated Watt-Hours, Kilowatt-Hours
- Intelligent Switch Control at Zero Crossings
- Digital Temperature Compensation
- Phase Compensation (±15°)
- Quick Calibration Routines
- 46-64Hz Line Frequency Range with Same Calibration
Applications/Uses
- Building Automation
- Consumer Appliances
- Data Center, Telecom, and Storage Power Supplies
- Home Automation
- Indoor/Outdoor Lighting
