Infineon Technologies IRS21953STRPBF

Overview

IRS21953STRPBF from Infineon Technologies is a high-voltage, high-speed half-bridge gate driver IC with integrated bootstrap diode, 600 V high-side voltage rating, 1.4 A peak source/sink current, and 150 ns propagation delay. It drives N-channel MOSFETs or IGBTs in motor control inverters and DC-DC resonant converters.

For engineers reviewing the IRS21953STRPBF datasheet, IRS21953STRPBF pinout, IRS21953STRPBF application, or IRS21953STRPBF equivalent, key selection criteria include high-side floating capability, independent high/low-side input logic, built-in dead-time control, and SOIC-16 thermal performance under 100 kHz switching.

Technical Context

This driver implements independent CMOS/TTL-compatible inputs for high-side (HIN) and low-side (LIN), with non-overlapping logic to prevent shoot-through. Its level-shift circuit enables reliable high-side operation up to 600 V dV/dt immunity of ±50 V/ns.

The internal bootstrap diode eliminates external diode placement, reducing BOM count and layout area. Propagation delay matching between channels is ≤25 ns, supporting precise PWM timing in three-phase inverter legs.

Key Specifications

Pinout & Package

Supplied in 16-pin SOIC package with exposed thermal pad (SOIC-16NB); body size 10.3 × 7.5 mm, pitch 1.27 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge gate driver applications.

Compared with IR2110STRPBF, IRS21953STRPBF reduces component count and improves noise immunity; versus UCC27211D, it provides true integrated half-bridge functionality with floating high-side drive-critical for inverter topologies requiring shoot-through protection and compact layout.

Availability

IRS21953STRPBF is available at Aetrix Electronics and suitable for motor inverters, resonant DC-DC converters, and solar microinverters requiring stable component supply and long-term industrial availability.

Supply support for IRS21953STRPBF 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/TS 16949 and ISO 14001.

The IRS21xxx family targets high-reliability half-bridge and full-bridge gate driving in energy-efficient motor drives and power conversion systems, emphasizing integration, noise robustness, and thermal efficiency.

FAQ

What is the minimum recommended bootstrap capacitor value for IRS21953STRPBF?

A 0.1 µF ceramic capacitor rated ≥25 V is minimum for 100 kHz operation with 50% duty cycle. For higher duty cycles or elevated temperature, use 0.22 µF X7R with 1206 footprint to limit V_BS droop below 8.7 V UVLO threshold and ensure reliable high-side conduction.

Can IRS21953STRPBF drive SiC MOSFETs directly?

Yes, with constraints: its 1.4 A peak current supports SiC devices up to 1200 V/40 mΩ when gate resistance is set to 5–10 Ω for controlled dv/dt. However, external negative turn-off bias or Miller clamp is recommended for robustness against parasitic turn-on in high-dV/dt environments.

Does IRS21953STRPBF include internal dead-time generation?

No-it provides independent HIN and LIN inputs without internal dead-time insertion. Dead-time must be implemented externally in the PWM controller or FPGA. This preserves timing flexibility for advanced modulation schemes like space-vector PWM where asymmetric dead-time is required.

How is thermal performance affected by the exposed pad in SOIC-16NB?

The exposed thermal pad (EPAD) must be soldered to ≥2 cm² of inner-layer copper pour connected to ground plane via ≥4 thermal vias (0.3 mm diameter). This reduces R_θJA from 70 °C/W to ~45 °C/W, enabling continuous 1.5 W dissipation at ambient ≤70 °C without forced airflow.