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STMicroelectronics STSID140-12 SMD Isolated Thyristor Driver

STMicroelectronics STSID140-12 Surface-Mount (SMD) Isolated Thyristor Driver is designed to provide robust and efficient triggering for power thyristors in industrial and consumer applications. The STMicroelectronics STSID140-12 features galvanic isolation between input and output, ensuring safe and reliable operation in high-voltage environments. With a maximum output current of 55mA and a wide operating temperature range from -30°C to +125°C, the driver supports precise and consistent gate control. Housed in a compact DFN-8 package, the device integrates protection features such as undervoltage lockout and thermal shutdown, enhancing system reliability. The STSID140-12 driver is particularly well-suited for Heating, Ventilation, and Air Conditioning (HVAC systems), motor control, and solid-state relays, where isolated gate triggering is essential.

Features

  • Gate driver for thyristor control
  • Triac AC switch and SCR control compliant
  • 40mA current output
  • Single 3.3V supply for direct MCU drive
  • +125°C maximum junction temperature
  • Low 5µA quiescent standby current
  • Input-output functional isolation
    • Isolation level tested at 2121VPK
    • High 3.92mm creepage distance, compliant with IEC 60335-1 standard for 250VRMS application with material group I and overvoltage category II
  • EMC performances
    • High ±4kV static immunity per IEC 61000-4-4 EFT
    • ±4kV overvoltage per IEC 61000-4-5
    • Compliant with EN 55016-2-1 and CISPR 16-2-1 for conducted noise
    • Compliant with EN 55016-2-3 and CISPR 16-2-3 for radiated noise
    • Compliant with ESD IEC 61000-4-2 up to ±2kV contact
  • Package
    • DFN-8 SMD compact package, 5.35mm x 3.45mm
    • Halogen-free molding, lead-free plating
    • ECOPACK2 compliant
    • RoHS compliant

Applications

  • HVAC systems
  • General-purpose AC line load switching
  • Inrush current limiting circuits for industrial Switched-Mode Power Supplies (SMPS) and Uninterruptible Power Supplies (UPS)
  • Heating resistor control and solid-state relays
  • Motor control circuits and starters

Specifications

  • 55mA maximum output current, 10mA to 40mA operating range
  • -0.5V to +4.5V maximum voltage range, 3.14V to 3.47V operating range
  • 6VDC maximum OUT+ to OUT-
  • 30VKP maximum repetitive/non-repetitive surge voltage between OUT+ and OUT-
  • 600V comparative tracking index (CTI)
  • 3pF barrier capacitance, input-to-output
  • 100kΩ typical input pull-down resistor
  • 5µA maximum quiescent current
  • 90mA maximum VDD pin consumption
  • 2.96V maximum undervoltage-lockout disabling operation
  • Material Group 1
  • Overvoltage Category 2
  • Moisture Sensitivity Level (MSL) 1
  • 70kV/µs common-mode transient isolation per IEC 60747-17
  • ±2kV maximum Human Body Model (HBM) ESD protection
  • ±4kV maximum contact surge applied between 6/7/8 shorted versus 1/2/3/4 shorted per IEC 61000-4-2 conditions
  • 220°C/W typical junction-to-ambient thermal resistance per JEDEC JESD51-x
  • -30°C to +125°C operating junction temperature range
  • +245°C maximum lead soldering temperature for 10s

Application Circuit Diagram

Application Circuit Diagram - STMicroelectronics STSID140-12 SMD Isolated Thyristor Driver

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Published: 2025-10-20 | Updated: 2025-10-28