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IR21271STR

IR21271STR Description

The IR21271STR from Infineon Technologies is a high-performance single-channel gate driver IC designed for high- and low-side MOSFET/IGBT switching applications. Operating within a 9V to 20V supply range, it delivers robust peak output currents of 250mA (source) and 500mA (sink), ensuring efficient switching of power devices. With a maximum bootstrap voltage of 600V, it supports high-voltage applications, making it suitable for industrial and automotive power systems. The device features fast switching characteristics, with typical rise/fall times of 80ns and 40ns, minimizing switching losses. Packaged in an 8-pin SOIC and available in Tape & Reel (TR), it is optimized for surface-mount assembly.

IR21271STR Features

• High-Side Voltage Capability: Supports up to 600V bootstrap voltage, ideal for high-voltage power stages.
• Fast Switching Performance: 80ns rise time and 40ns fall time enhance efficiency in high-frequency applications.
• Robust Drive Strength: 250mA source / 500mA sink current ensures reliable gate control for power switches.
• Wide Supply Range: Operates from 9V to 20V, compatible with various logic levels.
• Logic-Level Compatibility: VIL = 0.8V, VIH = 3V for seamless interfacing with microcontrollers and PWM controllers.
• Surface-Mount Package: 8-SOIC with MSL 1 (Unlimited) moisture sensitivity, suitable for automated PCB assembly.
• Obsolete Status: While no longer in production, it remains a viable choice for legacy designs requiring high-voltage gate driving.

IR21271STR Applications

• Motor Drives: Efficiently controls IGBTs/MOSFETs in BLDC and PMSM motor drives.
• Switched-Mode Power Supplies (SMPS): Enhances switching performance in high-voltage DC-DC converters.
• Industrial Inverters: Used in solar inverters and UPS systems for reliable high-side switching.
• Automotive Systems: Suitable for electric vehicle (EV) power modules requiring high-voltage isolation.
• Legacy Power Electronics: Maintains compatibility with older designs needing 600V-rated gate drivers.

Conclusion of IR21271STR

The IR21271STR is a high-voltage, single-channel gate driver offering fast switching, strong drive capability, and broad supply compatibility. While marked as obsolete, its 600V bootstrap rating and robust performance make it a dependable choice for industrial, automotive, and power conversion applications. Engineers working on legacy systems or high-voltage designs may still find it valuable despite newer alternatives in the market.