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IR21271S

IR21271S Description

The IR21271S from Infineon Technologies is a high-performance single-channel gate driver IC designed for high- and low-side switching applications. Operating within a 9V to 20V supply range, it delivers robust peak output currents of 250mA (source) and 500mA (sink), ensuring efficient control of power MOSFETs and IGBTs. With a maximum bootstrap voltage of 600V, it supports high-voltage applications while maintaining reliability. The device features fast switching characteristics, with typical rise and fall times of 80ns and 40ns, minimizing switching losses and enhancing system efficiency. Although marked as obsolete, its design remains relevant for legacy systems requiring high-voltage gate driving solutions.

IR21271S Features

• High-Side Voltage Capability: Supports up to 600V bootstrap voltage, ideal for high-voltage power stages.
• Fast Switching: 80ns rise time and 40ns fall time reduce power dissipation and improve efficiency.
• Robust Drive Strength: 250mA source / 500mA sink current ensures reliable switching of power devices.
• Wide Supply Range: 9V–20V operation accommodates diverse system requirements.
• Logic Compatibility: 0.8V (VIL) and 3V (VIH) thresholds ensure compatibility with 3.3V/5V logic.
• Surface-Mount Package: 8-pin SOIC for compact PCB integration.

IR21271S Applications

The IR21271S excels in applications requiring high-voltage switching and fast response times, such as:

• Motor Drives: Efficiently controls IGBTs in industrial and automotive motor systems.
• Switch-Mode Power Supplies (SMPS): Enhances performance in high-voltage DC-DC converters.
• Inverters: Suitable for solar inverters and UPS systems requiring robust gate driving.
• Industrial Automation: Used in PLCs and high-power control circuits.

Conclusion of IR21271S

The IR21271S is a high-voltage, high-speed gate driver optimized for demanding power electronics applications. Its strong drive capability, fast switching, and wide voltage range make it a reliable choice for legacy designs, particularly in motor control and power conversion systems. While obsolete, its performance characteristics ensure continued utility in specialized high-voltage environments.