Renesas RL78/I1C MCUs Are Used for Smart Meter with Advantages of Ingle-chip Solution for Low Power Consumption and Reduced System Cost

PublishTime： 2023-02-15 Article Source：Renesas Blogs

A smart energy meter enables a supplier to take readings wirelessly and remotely and to monitor the daily performance of the grid. Smart energy meters typically deliver readings more frequently and accurately than “automated” meters.

How Renesas Supports Smart Meter Applications

As a climate, policy, and market forces change, design engineers like you will be tasked with building smart meters into every power-consuming product and system. So why not start with a reliable microcontroller (MCU) with smart meter functions already on the chip?

Whether you're creating a one-phase power meter or a three-phase smart energy meter, Renesas has got you covered with the RL78/I1C microcontroller. Its advantages include:

Single-chip solution for low power consumption and reduced system cost
64- to 100-pin packages for nearly every implementation
Cost-effective flash memory for accurate data updates and maintenance
A 100 to 240 voltage range to meet international standards for electric current
Compatibility with metering designs that use a current transformer, Rogowski coil, and Hall effect sensors
Support for three-phase, four-wire meters -- in addition to conventional single-phase, two-wire, and three-phase, three-wire meters -- provides a common platform to develop industrial as well as consumer products
Over-the-air updates for firmware

Here's another helpful chart with all the specs:

Renesa Track Record

For more than 30 years, Renesas has been a chip supplier to meter manufacturers. Renesas released RL78/I1B microcontroller about 10 years ago. More recently Renesas introduced the more advanced RL78/I1C MCUs, which feature an on-chip ultra-low-power real-time clock. More than 162 million units have been shipped to manufacturers of electric power meters.

Last year, Renesas upgraded the RL78/I1C with 512 kilobytes of flash memory and more precise active- and reactive-power accuracy, Class 0.2S and Class 0.5S, respectively. And, of course, Renesas plans to add even more features and higher performance in the future.

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