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Section 690.12 of the US national electric code (NEC) has provisions that require rapid shutdown at module level for photovoltaic power plants. This Rapid Shutdown function can be implemented into a Smart Junction Box a more complex system compared to a traditional junction box which only has by-pass diodes, as it also measures voltage, current and temperature in each module. It also provides other functionalities including arc detection, security and performance monitoring, anti-theft protection, and remote diagnostics. Data sent on existing DC cabling via Powerline Communication (PLC) guarantees compliance to requirements including those set by the SunSpec Alliance.

With our range of high-performance STM32 Microcontrollers, flexible multi-protocol power line communication (PLMs),wireless connectivity solutions and Schottky by-pass diodes we can help developers design high-efficiency Smart Junction Boxes that meet safety and fire regulation requirements.

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Technical Documentation

    • Description Version Size Action
      AN4653
      Cycling endurance and data retention of high density EEPROM based on CMOS F8H process
      1.0
      267.34 KB
      PDF
      AN3432
      How to choose a bypass diode for silicon panel junction box
      1.0
      290.27 KB
      PDF
      AN4391
      New P-channel trench technology from ST for low power DC-DC conversions and load switching applications
      1.0
      1.6 MB
      PDF
      AN5046
      Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages
      4.0
      4.82 MB
      PDF
      AN869
      Tj max limit of Schottky diodes
      2.2
      60.9 KB
      PDF
      AN4653

      Cycling endurance and data retention of high density EEPROM based on CMOS F8H process

      AN3432

      How to choose a bypass diode for silicon panel junction box

      AN4391

      New P-channel trench technology from ST for low power DC-DC conversions and load switching applications

      AN5046

      Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages

      AN869

      Tj max limit of Schottky diodes

    • Description Version Size Action
      DN0010
      Adapting ST power line modem evaluation boards to communicate over a DC bus
      1.2
      404.54 KB
      PDF
      DN0010

      Adapting ST power line modem evaluation boards to communicate over a DC bus

Publications and Collaterals

    • Description Version Size Action
      Turnkey PLC chipset for smart-energy infrastructure 10.2017
      775.07 KB
      PDF

      Turnkey PLC chipset for smart-energy infrastructure

    • Description Version Size Action
      EEPROM selection guide 2.0
      843.56 KB
      PDF

      EEPROM selection guide

    • Description Version Size Action
      Products and solutions for solar energy 1.0
      1.29 MB
      PDF
      STM32F3 series - Mainstream 32-bit MCUs 17.09
      2.18 MB
      PDF

      Products and solutions for solar energy

      STM32F3 series - Mainstream 32-bit MCUs

Development Tools

    • Part Number

      STM32 and STM8 product finder for mobile devices and desktops

      Diode product finder application for Android and iOS

eDesignSuite

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

Diodes and Rectifiers

Part number Description
STPS20L45C 45 V, 20 A dual Low Drop Power Schottky Rectifier
Part number
45 V, 20 A dual Low Drop Power Schottky Rectifier

Interfaces and Transceivers

Part number Description
ST485AB very high speed low power RS-485/RS-422 transceiver, [-40oC, 85oC] temperature range
ST8500 Programmable power-line communication modem system-on-chip
Part number
very high speed low power RS-485/RS-422 transceiver, [-40oC, 85oC] temperature range
Programmable power-line communication modem system-on-chip

MEMS and Sensors

Part number Description
LM135 Precision Temperature Sensor
STLM20 Analog temperature sensor, ultra-low current 2.4 V, high precision
STTS75 Digital temperature sensor and thermal watchdog, delta-sigma analog-to-digital (ADC) converter, I2C interface
Part number
Precision Temperature Sensor
Analog temperature sensor, ultra-low current 2.4 V, high precision
Digital temperature sensor and thermal watchdog, delta-sigma analog-to-digital (ADC) converter, I2C interface

Power Management

Part number Description
L7985 2A step-down switching regulator
L7986 3A step-down switching regulator
Part number
2A step-down switching regulator
3A step-down switching regulator