Infineon Technologies IR2131STRPBF

Overview

IR2131STRPBF from Infineon Technologies (formerly International Rectifier) is a high-voltage, high-speed 3-phase gate driver IC with independent high-side and low-side outputs. It integrates six drivers (3 high-side, 3 low-side), supports up to 600 V offset voltage, delivers ±160 mA / +360 mA peak output current, operates with 10–20 V gate supply, and features matched 1.3 µs / 0.6 µs typical propagation delays. It is used in 3-phase motor inverters for industrial BLDC and PMSM drives.

For engineers reviewing the IR2131STRPBF datasheet, IR2131STRPBF pinout, IR2131STRPBF application, or IR2131STRPBF equivalent, key selection criteria include floating channel dV/dt immunity, integrated over-current shutdown via ITRIP, undervoltage lockout on both VCC and VBS supplies, and 2.5 V logic compatibility for microcontroller interfacing.

Technical Context

The IR2131STRPBF employs proprietary HVIC (High-Voltage IC) technology to enable monolithic high-side floating channels tolerant to −5 V to +600 V VS offset and immune to >50 V/ns dV/dt transients. Its three independent high-side drivers use bootstrap-supplied VBx pins referenced to VSx, while low-side drivers share VCC/VSS.

All six logic inputs (HIN1–3, LIN1–3, SD, FLT-CLR, ITRIP) are CMOS/LSTTL-compatible down to 2.5 V, and feature internal 5.2 V zener clamping. The open-drain FAULT output signals undervoltage or over-current events, with programmable blanking (400 ns) and fault-clear timing (400–1200 ns).

Key Specifications

Pinout & Package

IR2131STRPBF is packaged in a 28-lead SOIC (wide body, MS-013AE) with exposed pad for thermal enhancement. Pin assignments follow standardized layout per IRF datasheet PD60032 rev P.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-phase gate driver applications.

Compared with IRS2330JPbF and UCC27211D, the IR2131STRPBF uniquely combines analog current-sense input (ITRIP), dual-supply UVLO, and open-drain FAULT in a single 28-pin SOIC - simplifying protection implementation for cost-sensitive industrial inverters without sacrificing 600 V capability.

Availability

IR2131STRPBF is available at Aetrix Electronics and suitable for industrial motor drives, HVAC inverters, and solar microinverters requiring stable component supply and long-term production continuity.

Supply support for IR2131STRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification to ISO 9001 and IATF 16949.

The IR2131STRPBF belongs to Infineon's legacy IR(2)xxx high-voltage gate driver family, designed specifically for cost-optimized, high-reliability 3-phase inverter systems in industrial automation and appliance markets.

FAQ

What is the maximum allowable dV/dt at the VS pins?

The IR2131STRPBF is rated for 50 V/ns dV/dt immunity on its high-side floating supply returns (VS1–3). This specification ensures reliable operation during fast switching transitions in 600 V bridge configurations without false turn-on or latch-up, provided PCB layout minimizes parasitic inductance in the VS trace path.

Can the ITRIP pin be used with a current transformer instead of a shunt resistor?

Yes - the ITRIP pin accepts any voltage signal within 0–600 mV, including conditioned outputs from current transformers or Hall-effect sensors. However, external signal conditioning (e.g., rectification, filtering, scaling) is required to match the 250–600 mV threshold window and meet the 400 ns blanking timing requirement.

Is the FAULT output latched or auto-clearing?

The FAULT output is latched low until explicitly cleared by a low-to-high transition on the FLT-CLR pin. It remains asserted during sustained over-current or UVLO conditions and does not auto-clear when the fault condition ends - ensuring persistent fault indication for system-level diagnostics and safe shutdown sequencing.

Does the IR2131STRPBF support 100% duty cycle on high-side outputs?

No - due to bootstrap gate drive architecture, continuous high-side conduction requires periodic low-side switching to recharge the VBx capacitors. For true 100% duty cycle, an external isolated DC–DC supply or charge-pump circuit must replace the bootstrap network on the affected channel(s).