IR2111

Gate Driver Overview

The IR2111 is a high-voltage, fast power MOSFET and IGBT driver IC designed for half-bridge and full-bridge topologies. It features a 600 V breakdown voltage capability with functional level shift isolation. The device provides a source current of 0.25 A and a sink current of 0.5 A. It operates within a supply voltage range of 10 V to 20 V. Key electrical parameters include a maximum turn-on propagation delay of 750 ns and a maximum turn-off propagation delay of 150 ns. The component supports junction isolation and includes undervoltage lockout protection.

Gate Driver Feature Summary

• Integrated high-side and low-side drivers with bootstrap support for floating high-side switching
• Functional level shift isolation enabling operation in high-voltage half-bridge configurations
• Undervoltage lockout mechanisms protect both the logic supply (VCC) and bootstrap supply (VBS)
• CMOS logic input compatibility for direct interfacing with standard control circuits

Gate Driver Applications

• Motor drive systems requiring isolated gate control
• Power supply inverters utilizing half-bridge or full-bridge architectures
• Class D audio amplifiers needing high-voltage output stages
• Induction heating equipment driving resonant loads

Gate Driver Procurement Notes

Verify the specific package variant required, such as PDIP-8 for through-hole or SOIC-8 for surface mount, as pinouts remain consistent but physical form factors differ. Confirm availability status, noting that certain suffixes like SPBF may indicate end-of-life or obsolescence phases. Ensure the selected part matches the intended mounting method and thermal management requirements for the target application environment.

Gate Driver Selection Notes

Select this driver when a robust solution for driving high-side switches in up to 600 V applications is needed without external discrete components. Consider the 0.25 A source current limitation for high-gate-charge devices; larger MOSFETs may require additional buffering. Evaluate the propagation delays against switching frequency requirements to ensure minimal cross-conduction risk in bridge configurations.

Gate Driver Part Context

The IR2111 belongs to the IR211x family of high-voltage gate drivers from Infineon Technologies. It serves as a foundational component for medium-power inversion tasks. Unlike single-channel drivers, it integrates two channels with independent outputs. The series is widely recognized for its reliability in industrial motor control and general-purpose power conversion systems where galvanic isolation between control and power domains is critical.

Gate Driver Replacement Considerations

• IR2113: Offers similar functionality but includes an additional shutdown pin for enhanced control flexibility.

Gate Driver FAQ

What is the maximum voltage rating for the high-side floating supply?

The IR2111 is rated for a maximum breakdown voltage of 600 V on the high-side floating supply.

How does the device handle undervoltage conditions?

It incorporates undervoltage lockout (UVLO) circuits that disable the outputs if either the VCC or VBS supply drops below specified thresholds, preventing incomplete switching.