Infineon Technologies IRS2181STRPBF

Overview

IRS2181STRPBF 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, 180 ns typical turn-on propagation delay, 1.4 A source / 1.8 A sink peak output current, and 3.3 V/5 V logic-compatible inputs. It is used in half-bridge motor drives and SMPS inverters where bootstrap high-side operation is required.

For engineers reviewing the IRS2181STRPBF datasheet, IRS2181STRPBF pinout, IRS2181STRPBF application, or IRS2181STRPBF equivalent, key selection criteria include high-side dV/dt immunity (50 V/ns), matched propagation delays (<35 ns skew), undervoltage lockout thresholds (8.2–9.8 V for VCC/VBS), and SOIC-8 package thermal resistance (200 °C/W).

Technical Context

The device integrates a ruggedized monolithic HVIC with latch-immune CMOS technology, enabling reliable operation at VS = −5 V to +600 V. Its floating channel uses pulse-transformed level shifting and built-in UV detection on both VCC and VB supplies.

Logic inputs (HIN/LIN) drive independent high- and low-side output stages with matched timing and cross-conduction prevention via internal delay circuitry. The HO output references VS, while LO references COM - supporting asymmetric ground offsets up to ±5 V between logic and power grounds.

Key Specifications

Pinout & Package

IRS2181STRPBF is housed in an 8-lead SOIC package (body width 3.9 mm, JEDEC MS-012), surface-mount compatible with standard reflow profiles and rated for 125 °C junction temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS2184STRPBF, IRS2181STRPBF offers tighter timing control and lower power consumption but lacks programmable dead time; versus IR2110SPBF, it delivers faster switching, better noise immunity, and modern logic-level compatibility at the cost of slightly higher complexity in bootstrap design.

Availability

IRS2181STRPBF is available at Aetrix Electronics and suitable for industrial motor drives, AC-DC SMPS inverters, and induction heating systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for IRS2181STRPBF 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 global manufacturing and quality certification to ISO 9001 and IATF 16949.

The IRS218x family targets high-reliability half-bridge gate driving in high-voltage power conversion, emphasizing dV/dt immunity, timing precision, and bootstrap robustness for demanding industrial applications.

FAQ

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

The IRS2181STRPBF is rated for 50 V/ns dV/dt at the VS pin under PDIP test conditions. This specification ensures immunity to false triggering during fast high-side switching events in hard-switched topologies. The SOIC-8 variant maintains equivalent performance per Infineon's characterization data, validated across temperature and supply voltage ranges.

Can IRS2181STRPBF drive IGBTs directly?

Yes - IRS2181STRPBF is explicitly qualified for IGBT gate driving per its datasheet, supporting gate charge requirements up to 100 nC with its 1.4 A/1.8 A peak output current. Its 10–20 V VCC/VB supply range aligns with standard IGBT gate bias needs, and the 600 V floating capability accommodates common 600 V and 1200 V IGBT modules in half-bridge configurations.

Is a bootstrap diode required for high-side operation?

Yes - a fast recovery or Schottky bootstrap diode (e.g., 1N4148W or equivalent) is mandatory between VCC and VB to charge the bootstrap capacitor during low-side conduction. The diode must withstand reverse voltage > VCC and support peak current > 10 mA; insufficient charging causes VBS UVLO and HO shutdown.

Does IRS2181STRPBF support 3.3 V microcontroller interfaces without level shifters?

Yes - the HIN and LIN inputs accept 3.3 V logic levels directly: VIH(min) = 2.5 V and VIL(max) = 0.8 V at VSS/COM reference, with input bias current ≤60 µA at 5 V. This allows direct connection to ARM Cortex-M or RISC-V MCU GPIOs without external translation circuitry.