FDA217

Isolators - Gate Drivers Overview

The Littelfuse FDA217 is a dual photovoltaic MOSFET driver featuring optically isolated input-to-output channels. Each channel comprises an LED optically coupled to a photodiode array, which generates a floating power source sufficient to drive high-power MOSFET transistors without external gate supply voltage. The device supports AC and DC switching configurations with a control current of 5 mA. It operates without generating electromagnetic interference (EMI) or radio frequency interference (RFI), making it suitable for discrete solid-state relay designs and other isolated switching applications in industrial and telecommunications environments.

Isolators - Gate Drivers Feature Summary

• Optically isolated input-to-output architecture eliminates the need for external gate drive voltages
• Capable of configuring for both AC and DC switching operations
• Operates with low control current to minimize input power consumption
• Inherently free from EMI and RFI generation during switching events

Isolators - Gate Drivers Applications

• Discrete solid-state relay designs
• Industrial control systems requiring galvanic isolation
• Telecommunications equipment signal switching
• Instrumentation circuits needing noise-free isolation

Isolators - Gate Drivers Procurement Notes

Verify the specific suffix designation (e.g., S, STR) against the manufacturer's datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with the target MOSFET gate charge requirements by reviewing the photodiode array's current sourcing capability. Confirm that the optical isolation voltage ratings meet the system's safety standards before integration into the final design.

Isolators - Gate Drivers Selection Notes

Select this component when galvanic isolation is required without the complexity of external gate drivers. It is appropriate for applications demanding low EMI/RFI emissions and simple interface logic. Consider the maximum output current capability relative to the connected MOSFETs' switching speed requirements. Evaluate the operating temperature range to ensure reliability within the intended environmental conditions.

Isolators - Gate Drivers Part Context

The FDA217 belongs to the family of photovoltaic MOSFET drivers manufactured by Littelfuse (formerly IXYS). These devices utilize photodiode arrays to generate floating gate drive voltages directly from the optical coupling mechanism. This technology simplifies circuit design by removing the need for isolated power supplies for each channel, offering a compact solution for multi-channel isolation needs.

Isolators - Gate Drivers Replacement Considerations

Check for FDA217S or FDA217STR variants for different packaging options. Verify pinout compatibility with alternative dual photovoltaic drivers if substituting. Ensure replacement parts maintain equivalent optical isolation ratings and output current capabilities for the specific MOSFET load.