PMBus and SL Power Products Application Note
There is slow evolution in power supply technology compared to some other Integrated Chip (IC) based technology. Last several years it has seen that the requirements of power supply have started to get challenging with need for high efficiency, high power density, flexibility and ease of integration and control. To achieve some of these requirement Power Management Bus (PMBus) was added to traditional power supply. For years PMBus, CAN Bus, RS-232 and others SPI’s have been used to relay basic serial messages between devices. PMBus is based on the I2C interface protocol and is designed for controlling and monitoring power supplies. More recently, digital control via ethernet and USB communications have provided engineers/technicians with the ability to remotely monitor these devices. Front end power supplies with a web-based interface for remote monitoring is very attractive and provides a variety of benefits to users. Using I2C chips, an I2C master controller, and a digital interface, power supplies are one of the devices that can be remotely monitored and controlled.
Primary benefits of power supplies with I2C bus communications:
●Easily monitor output voltage, output current, output power and operating temperature.
●Reduced labor costs associated with monitoring power consumption.
●Can remotely turn on/off outputs as needed hence saving energy.
●Can be integrated to web based interface for modern communication system.
●Easier and faster troubleshooting when matrix of power supplier is used, e.g. Vertical farming.
●No or less increase in cost of power supply units.
Remotely monitoring the output voltage (Vout), output current (Iout), output power (Pout), and operating temperatures of power supply allows for timely solutions to be applied in case of a failure. The addition of I2C interface as an option to a power supply unit makes it easier to integrate a power supply to digital web-based interface communication systems making these power supply highly advantageous in todays connected world. The whole system can be controlled as a cluster of power supplies working independently where various outputs can be remotely turned off or on as needed. Industries can reduce labor costs by monitoring many power supplies (and other connected devices) from one central location instead of in-room monitoring of power consumption.
Using a web interface makes power management from anywhere in the world a feasible option. Power supplies equipped with I2C and Ethernet communications are the ideal solution for green houses/vertical farms and where an integrated lighting solution is needed. Examples are: Entertainment and sporting events, data centers, or any system where remote monitoring is preferred or necessary.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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07.19 |
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REV.0719 |
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1.1 MB |
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