US letter launched the simplest industrial PLC digital isolation solution "Corona"

Maxim Integrated Products, Inc. (NASDAQ: MXIM) launched Corona (MAXREFDES12 #), a reference design for programmable logic controller (PLC) digital input subsystem, which effectively reduces power consumption, system cost, and size. The design reduces the number of isolated channels and enables analog integration of industrial control and automation applications.

One way to reduce the size of the PLC I / O solution is to reduce the number of digital isolation channels. The Corona reference design integrates three Maxim devices, including the transformer driver, effectively reducing the number of isolation channels, eliminating the optocoupler and discrete components that consume more power, resulting in a 16% reduction in power consumption and a 38% reduction in solution size. %, Cost reduction by 23%. The Maxim device used in the Corona reference design is specifically designed for harsh industrial application environments, with an operating temperature range of -40 ° C to + 125 ° C, making it ideal for PLC and other automation applications.

Maxim Corona block diagram

Main advantage

Analog integration: Maxim ’s digital isolators reduce the number of isolation channels to four, eliminating the need for optocouplers; digital input serializers are optimized for 16, 24, and 32 input designs, and the SPI bus supports daisy chain architecture to further reduce The number of isolated channels saves more design resources

· Lower power consumption: the industry's lowest power consumption index; power consumption is 16% lower than traditional design

· Lower cost: Compared with traditional design, the total number of devices is reduced by 38, so the cost of this integrated solution is lower

· Smaller size: 51% reduction in component count compared to traditional designs

Corona integrated device

· MAX31911: 8-channel, industrial digital input signal level shifter / serializer, with the industry's lowest power consumption index, effectively reducing the number of circuit board components

· MAX14850: 6-channel digital isolator with low power consumption, stable performance in high temperature environment; passed UL1577, CSA, IEC 60747-5-2 safety certification; replacement of optocouplers with limited LED life, operating time can be extended by 5 times

· MAX13256: 36V H-bridge transformer driver simplifies isolated power supply design

Industry evaluation

· Tony Partow, Senior Business Manager of Maxim Integrated, said: "The MAX31911 power supply current consumption in Corona design is 80% lower than that of competitive solutions, demonstrating the perfect integration of our expertise in analog integration and advanced high-voltage semiconductor processes. Corona is represented The reference design can accelerate the design process and provide innovative solutions. "

Susie Inouye, research director and founder of Databeans, said: "The importance of reference designs is increasing day by day, and designers can develop advanced solutions and shorten the development cycle through reference designs."

About Maxim Integrated

At Maxim Integrated, we aim to design more integrated solutions. With our simulation integration solution, everything is possible. The company's fiscal year 2013 sales were $ 2.4 billion.

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