Power Electronics
Image courtesy of STMicroelectronics

(Image courtesy of STMicroelectronics).

High-Speed Digital-Input Current Limiters Designed for Factory Automation

STMicroelectronics has introduced two high-speed digital-input current limiters that set new standards for circuit protection in factory automation. The SCLT3-8BQ7 and CLT01-38SQ7 provide industrial Programmable Logic Controllers (PLCs) - the "brains" of smart factories and industrial robots - with fast, robust protection against unwanted input-signal current spikes while reducing power consumption, board space, and component costs.

The new devices meld ST's long-standing leadership in Transient Voltage Suppressors with its state-of-the-art packaging technology. Both devices are housed in the highly compact QFN-48L (7x7mm) package with a large exposed thermal pad that optimizes power dissipation at ambient temperatures greater than 100ºC. Key technical features include:

  • 8 high-speed SPI protected outputs
  • 8/16-bit high-speed SPI output
  • High-side inputs with common ground
  • Integrated 5V regulator
  • 30V+ reverse polarity protection
  • Energy-free LED output signal for visual status indication
  • 78mW/channel power-dissipation capability
  • Temperature/voltage alarm options

The CLT01-38SQ7 also delivers robustness compliant with the most stringent international EMC (Electromagnetic Compatibility) standards such as IEC 61000-4.2, IEC61000-4.4, and IEC6100-4.5.

The SCLT3-8BQ7 and CLT01-38SQ7 are now available in volume at $0.9 for 1,000-unit quantities. Also, evaluation boards are available for both the SCLT3-8BQ7 (STEVAL-IFP030V1) and the CLT01-38SQ7 (X-NUCLEO-PLC01A1). 

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