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IR2125S

IR2125S Description

The IR2125S from Infineon Technologies is a high-voltage, high-speed single-channel gate driver designed for high-side MOSFET and IGBT applications. Operating within a 0V to 18V supply range, it supports bootstrap voltages up to 500V, making it suitable for demanding power electronics systems. With a peak output current capability of 1.6A (source) and 3.3A (sink), it ensures robust switching performance. The device features fast rise/fall times (43ns/26ns, typical) and logic-level compatibility (VIL = 0.8V, VIH = 2.2V), enabling efficient control in high-frequency circuits.

IR2125S Features

• High-Side Drive: Supports 500V bootstrap voltage, ideal for floating power stages.
• Fast Switching: 43ns rise time and 26ns fall time minimize switching losses.
• High Current Drive: 1.6A source / 3.3A sink ensures strong gate control for power devices.
• Wide Supply Range: 0V to 18V operation accommodates diverse logic interfaces.
• Surface-Mount Package: 16-SOIC for compact PCB integration.
• Robust Protection: Undervoltage lockout (UVLO) and logic-level compatibility enhance reliability.

IR2125S Applications

• Motor Drives: High-current switching in BLDC/PMSM motor controllers.
• Power Supplies: Half-bridge and full-bridge topologies in SMPS and inverters.
• Industrial Systems: IGBT/MOSFET driving in welding equipment and UPS systems.
• Renewable Energy: Solar inverters requiring high-voltage isolation.
• Automotive: High-side switches in DC-DC converters and battery management.

Conclusion of IR2125S

The IR2125S excels in high-voltage, high-speed gate driving, offering low switching losses, strong current drive, and robust protection. While now obsolete, its performance remains relevant for legacy designs in motor control, power conversion, and industrial systems. Engineers seeking alternatives should consider Infineon’s newer gate drivers with enhanced features, but the IR2125S remains a proven choice for high-side switching applications.