The SI8711AC-B-IPR is a high-performance, isolated field-effect transistor (FET) driver from Skyworks Solutions Inc. This device utilizes a capacitive isolation technology to provide robust galvanic isolation between the input and output stages. The SI8711AC-B-IPR is designed to drive power MOSFETs or IGBTs in various applications, offering superior performance, reliability, and flexibility compared to traditional optocoupler-based solutions.

Applications

• Switch Mode Power Supplies (SMPS): Driving MOSFETs in AC-DC and DC-DC power supplies.
• Motor Control: Controlling IGBTs and MOSFETs in motor drives for industrial automation and robotics.
• Solar Inverters: Driving power switches in solar power inverters for residential and commercial applications.
• Industrial Inverters: Driving IGBTs/MOSFETs in industrial inverter systems.
• Isolated Gate Drivers: Providing isolated gate drive for various power switching applications.
• Uninterruptible Power Supplies (UPS): Driving MOSFETs in UPS systems.

Features

• High Isolation Voltage: Offers reinforced isolation withstanding high voltages, enhancing system safety and reliability.
• CMTI (Common Mode Transient Immunity): High CMTI ensures reliable operation in noisy environments.
• Low Propagation Delay: Fast switching speeds improve system efficiency and reduce dead time.
• Wide Operating Voltage Range: Supports a broad range of input and output voltages, providing flexibility in system design.
• Adjustable Dead Time: Allows optimization of switching performance and reduction of power losses.
• Output Short-Circuit Protection: Protects the device and the driven power switch from damage due to short circuits.
• Over-Temperature Protection: Prevents thermal runaway and ensures long-term reliability.
• RoHS Compliant: Compliant with Restriction of Hazardous Substances directive.

Benefits

• Improved System Efficiency: Fast switching speeds and adjustable dead time minimize power losses and improve overall efficiency.
• Enhanced Reliability: High isolation voltage, CMTI, and protection features ensure robust and reliable operation in harsh environments.
• Simplified Design: Integrated features and wide operating voltage range simplify system design and reduce component count.
• Increased Safety: Galvanic isolation provides enhanced safety by preventing ground loops and protecting sensitive circuitry.
• Reduced System Cost: Integrated protection features and simplified design can lower overall system cost.

Technical Specifications

The SI8711AC-B-IPR features a capacitive isolation barrier, enabling high-speed data transfer with low power consumption. It supports a wide input voltage range and offers various output configurations to accommodate different power switch types. The device is available in a compact package, making it suitable for space-constrained applications. Key specifications include:

• Isolation Voltage: Up to 5 kVrms.
• Operating Temperature: -40°C to +125°C.
• Propagation Delay: Typically around 10 ns.
• Supply Voltage Range: 2.5V to 5.5V.
• Output Current: Capable of driving a wide range of power MOSFETs and IGBTs.