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IR2108S

IR2108S Description

The IR2108S from Infineon Technologies is a high-voltage, high-speed gate driver IC designed for half-bridge configurations in power electronics applications. Housed in an 8-pin SOIC package, this obsolete yet robust driver supports independent high- and low-side outputs, making it suitable for driving MOSFETs and IGBTs in demanding environments. With a supply voltage range of 10V to 20V and bootstrap capability up to 600V, it ensures reliable switching performance in high-voltage circuits. The device features fast switching characteristics, with typical rise and fall times of 150ns and 50ns, respectively, optimizing efficiency in high-frequency applications.

IR2108S Features

• High-Side Voltage Support: Bootstrap operation up to 600V for driving high-side switches.
• Fast Switching: 150ns rise time and 50ns fall time minimize switching losses.
• Peak Output Current: 200mA source / 350mA sink for robust gate drive capability.
• Wide Logic Compatibility: VIL = 0.8V, VIH = 2.9V ensures compatibility with 3.3V/5V logic.
• Independent Channels: Enables flexible half-bridge or low-side driver configurations.
• Surface-Mount Package: 8-SOIC for compact PCB designs.
• Robust Construction: MSL 1 (Unlimited) moisture sensitivity and REACH compliance for reliability.

IR2108S Applications

The IR2108S is ideal for:

• Motor Drives: Efficiently controls BLDC and PMSM motors in industrial and automotive systems.
• Switched-Mode Power Supplies (SMPS): Enhances performance in high-voltage DC-DC converters.
• Inverters: Drives IGBTs/MOSFETs in solar inverters and UPS systems.
• Half-Bridge Topologies: Suitable for resonant and hard-switched converters.
• Industrial Automation: Used in PLC-based power stages and servo drives.

Conclusion of IR2108S

The IR2108S offers a high-performance, high-voltage gate driving solution for power electronics, combining fast switching, robust current handling, and flexible channel control. While marked obsolete, its 600V bootstrap capability and wide logic compatibility make it a preferred choice for legacy designs in motor control, inverters, and industrial power systems. Engineers seeking a reliable half-bridge driver with low propagation delays and high noise immunity may still find value in this IC for specialized applications.