Crocus Technology Enhances Accuracy of Energy Metering Solutions
TMR Sensor Reference Design with Digital Output Simplifies Implementation
MILPITAS, Calif., May 24, 2022 (GLOBE NEWSWIRE) -- Crocus Technology Inc., developer of XtremeSense® TMR sensors, today announced the release of a high accuracy energy metering solution with isolated current sensing and a digital output. The solution is capable of measuring power, voltage and current while providing 1,820 VPK isolation in AC or DC applications. The result is a smaller and more efficient design without the use of large current transformers. The solution is ideal for a range of smart devices such as power supply monitors, electric vehicle chargers, household appliances, motor control and smart lighting.
The solution consists of the Crocus’ CT430 TMR isolated current sensor, Microchip’s ATtiny426 microcontroller, Printed Circuit Board (PCB), design files, microcontroller firmware, Bill of Materials (BoM) list, user guide and relevant support for designing a fully functional power monitoring solution. The design solution has been verified to accurately read and quantize the voltage and current values prior to calculating the instantaneous and Root Mean Square (RMS) power components, active and reactive power, as well as power factor. These power values are stored in registers which can be accessed by an external microcontroller via the SPI interface. By offloading the design effort of measuring and calculating power, the Crocus metering solution simplifies the addition of metering capabilities to any smart device.
The key to precise power measurements is the CT430 current sensor which provides better than 1% current measurement accuracy over the -40°C to +125°C operating range. It is available in a small 16-lead SOIC-Wide package, eliminating the need for bulky current transformers and allowing for more compact designs. The CT430 solution can also be customized with different bus interfaces such as I2C, SENT and CAN. By leveraging the solution, manufacturers and designers can quickly develop accurate and compact power monitoring capabilities for their products. See the figure below for the system diagram of the Crocus reference design kit for power measurements.
“Being able to accurately measure power and communicate this data within a system continues to be a challenge for designers,” said Tim Kaske Crocus Vice President, Sales & Marketing. “The Crocus solution with the CT430 current sensor provides improved accuracy over existing magnetic sensor based designs. With a validated design solution and a 12-week lead-time, OEM design customers are able to quickly integrate the energy metering solution into their end products.”
Design files required for manufacturing or customizing this power meter PCB are available for download. https://crocus-technology.com/powermeter/.
Also available for download is the AN136 CT430 Power Measurement Module user guide, https://www.crocus-technology.com/wp-content/uploads/2022/05/AN136-CT430-Power-Measurement-Module-Rev0.0.pdf.
About Crocus Technology
Crocus Technology develops and manufactures state-of-the-art magnetic sensors based on its patented XtremeSense® TMR sensor technology. Crocus’ disruptive magnetic sensor technology brings significant advancements to IoT and smart devices, industrial, consumer, medical, and automotive electronics applications demanding high accuracy, high resolution, stable temperature performance, and low power consumption. Crocus is headquartered in Milpitas, California. To learn more about Crocus Technology and its leading-edge TMR technology, please visit www.crocus-technology.com.
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