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IR2104S

IR2104S Description

The IR2104S from Infineon Technologies is a high-voltage, high-speed half-bridge gate driver IC designed for driving MOSFETs and IGBTs in synchronous applications. Operating within a 10V–20V supply range, it features 600V bootstrap capability, making it suitable for high-side switching in half-bridge or full-bridge topologies. With dual independent drivers, it delivers 210mA source and 360mA sink peak current, ensuring robust switching performance. The device is optimized for fast switching with 100ns rise and 50ns fall times, minimizing power losses in high-frequency applications. Though marked as obsolete, it remains relevant in legacy designs requiring reliable high-voltage gate driving.

IR2104S Features

• High-Side Voltage Support: Up to 600V bootstrap voltage enables high-voltage applications.
• Fast Switching: 100ns rise / 50ns fall times reduce switching losses.
• Dual Drivers: Two independent drivers for synchronous control of high- and low-side switches.
• Robust Drive Strength: 210mA (source) / 360mA (sink) peak output current for efficient MOSFET/IGBT switching.
• Wide Logic Compatibility: 0.8V (VIL) / 3V (VIH) thresholds ensure compatibility with 3.3V/5V logic.
• Surface-Mount Package: 8-SOIC for compact PCB integration.
• Reliability: MSL 1 (Unlimited) moisture sensitivity and REACH compliance for industrial durability.

IR2104S Applications

The IR2104S excels in:

• Motor Drives: Brushless DC (BLDC) and stepper motor control.
• Switching Power Supplies: Half-bridge/full-bridge converters, inverters.
• Industrial Systems: High-voltage DC-AC inverters, UPS systems.
• Automotive Electronics: Auxiliary power modules (legacy designs).
  Its high noise immunity and fast transient response make it ideal for high-frequency switching environments where efficiency and reliability are critical.

Conclusion of IR2104S

While the IR2104S is obsolete, its high-voltage capability, fast switching, and robust drive strength make it a viable choice for legacy or niche applications requiring synchronous half-bridge control. Engineers valuing Infineon’s proven reliability may still leverage this IC in motor drives, power converters, and industrial systems where replacement with newer alternatives is impractical. For new designs, consider Infineon’s modern gate drivers with enhanced features.