Infineon Technologies IRS2181SPBF

Overview

IRS2181SPBF from Infineon Technologies is a high-voltage, high-speed dual-channel gate driver IC for N-channel MOSFETs and IGBTs, featuring independent high-side (HO) and low-side (LO) outputs with 600 V floating capability, 1.4 A/1.8 A peak source/sink current, and 180–270 ns turn-on propagation delay. It operates with 10–20 V gate supply, supports 3.3 V/5 V logic inputs, and includes undervoltage lockout on both channels for motor inverter and half-bridge power stage applications.

For engineers reviewing the IRS2181SPBF datasheet, IRS2181SPBF pinout, IRS2181SPBF application, or IRS2181SPBF equivalent, key selection criteria include high-side floating voltage tolerance (up to +600 V), matched propagation delays between channels, bootstrap-compatible HVIC architecture, and logic-ground offset tolerance (±5 V) in industrial motor drives and SMPS half-bridge topologies.

Technical Context

The IRS2181SPBF integrates a proprietary high-voltage level-shifting circuit enabling robust operation at VS = 600 V while maintaining logic integrity across ±5 V COM–VSS offset. Its internal latch-immune CMOS process ensures noise resilience against dV/dt transients up to 50 V/ns.

Each channel features independent UVLO thresholds (8.0–9.8 V for VCC/VBS), pulse-filtered input logic, and matched timing paths-resulting in ≤35 ns delay mismatch between HO and LO edges under all operating conditions (VS = 0–600 V, TA = –40 to +125 °C).

Key Specifications

Pinout & Package

IRS2181SPBF uses an 8-lead PDIP package with through-hole mounting and creepage-optimized lead frame for high-voltage isolation. Pin functions are validated per IRF PD60262 datasheet Rev. A.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side/low-side gate driver applications.

Compared with IRS2184SPBF and UCC27211D, the IRS2181SPBF offers optimal balance of 600 V ruggedness, matched timing, and minimal external components for cost-sensitive industrial inverters where bootstrap simplicity and proven reliability outweigh programmability or extreme speed.

Availability

IRS2181SPBF is available at Aetrix Electronics and suitable for motor inverters, solar microinverters, and industrial SMPS requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole packaging.

Supply support for IRS2181SPBF 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, and industrial control ICs, with leadership in high-voltage gate drivers and silicon carbide solutions.

The IRS218x family targets cost-effective, robust half-bridge gate driving in industrial motor drives and renewable energy systems, emphasizing bootstrap compatibility, dV/dt immunity, and extended temperature operation.

FAQ

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

The IRS2181SPBF is rated for dV/dt immunity up to 50 V/ns under standard test conditions (8-lead PDIP package). This specification ensures reliable operation during fast switching transitions in 600 V bus applications without false triggering, provided PCB layout minimizes parasitic inductance on the VS trace and bootstrap loop.

Can IRS2181SPBF drive SiC MOSFETs directly?

Yes - its 1.4 A source / 1.8 A sink peak current, 40 ns rise time, and 600 V floating capability meet typical gate drive requirements for 1200 V SiC MOSFETs in half-bridge configurations. However, external negative turn-off bias or active Miller clamp may be needed for highest reliability in hard-switching applications.

Is VSS present on the IRS2181SPBF pinout?

No - VSS is only implemented on the 14-lead variants (e.g., IRS21814SPBF). The IRS2181SPBF uses COM as the sole logic and low-side ground reference; VSS is absent, simplifying layout but requiring strict COM routing to minimize ground bounce.

What bootstrap capacitor value is recommended for 20 kHz operation?

A 0.1 µF X7R ceramic capacitor rated ≥25 V is recommended for 20 kHz PWM with 50% duty cycle. Calculations based on Qg = 50 nC, f = 20 kHz, and ΔV = 1.5 V yield Cboot ≥ 0.067 µF; derating by 50% ensures margin for leakage and ESR effects across temperature.