Infineon Technologies IRSM505-084PA

Overview

IRSM505-084PA from Infineon Technologies (formerly International Rectifier) is a 250V, 3-phase integrated power module (IPM) with trench FREDFETs and embedded high-voltage half-bridge gate drivers for small-appliance motor drives. It delivers 4.6A DC per phase, features 0.45Ω max R_DS(on) at 25°C, includes NTC-based temperature feedback (VTH pin), and supports 20kHz PWM switching in DIP23 package.

For engineers reviewing the IRSM505-084PA datasheet, IRSM505-084PA pinout, IRSM505-084PA application, or IRSM505-084PA equivalent, key selection criteria include its integrated bootstrap functionality, matched propagation delay across all six channels, -40°C to 150°C junction temperature range, and UL E252584 certification for appliance-grade reliability.

Technical Context

This IPM integrates three independent high-voltage IC (HVIC) half-bridge drivers with low-side logic-level inputs (HIN/LIN), each driving a 250V Trench MOSFET with body diode recovery energy of 6µJ at 25°C. The module uses isolated floating supplies (VB1–VB3 referenced to VS1–VS3) and provides open-source terminals (VR1–VR3) for shunt-based current sensing on all low-side legs.

Thermal management is enabled via an internal NTC thermistor (47kΩ @ 25°C, B = 4050K) connected to VTH, allowing real-time junction temperature monitoring. The 1900V_RMS isolation rating and dV/dt-optimized layout support low-EMI operation in compact fan and pump inverters without external snubbers.

Key Specifications

Pinout & Package

DIP23 package: 23-pin dual-in-line, through-hole mount, 14.5mm × 3.8mm footprint, RoHS-compliant, MSL3 rated.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-phase motor drive applications.

Compared with IRSM515-084PA, IRSM505-084PA adds thermal monitoring at no pinout or footprint penalty; versus FAN7382MX, it reduces bill-of-materials by integrating power switches, drivers, and protection-ideal for space-constrained appliance designs.

Availability

IRSM505-084PA is available at Aetrix Electronics and suitable for energy-efficient ceiling fans, compact HVAC blowers, and smart washing machine drum motors requiring stable component supply and long-term industrial lifecycle support.

Supply support for IRSM505-084PA 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 acquired International Rectifier in 2015 and continues to develop and support its µIPM™ family of intelligent power modules for consumer and industrial motor control.

The IRSM505-084PA belongs to the µIPM™-DIP product line, engineered specifically for cost-sensitive, high-volume small-appliance inverters demanding integrated protection, thermal feedback, and simplified PCB layout.

FAQ

What is the maximum continuous output current per phase for IRSM505-084PA?

The IRSM505-084PA supports 4.6A DC output current per MOSFET at TC = 25°C, derating to approximately 2.8A at TC = 100°C based on its 6.9°C/W junction-to-case thermal resistance. This rating assumes adequate heatsinking and airflow per the application note AN-1051.

Can IRSM505-084PA be used with 3.3V microcontrollers without level shifting?

Yes. Its HIN/LIN inputs have 2.2V typical positive-going threshold and 0.8V negative-going threshold, making them fully compatible with standard 3.3V CMOS logic. Input bias current remains below 18µA at 3.3V, ensuring minimal loading on MCU GPIOs.

How is the NTC thermistor in IRSM505-084PA calibrated and used in practice?

The integrated NTC has 47kΩ ±5% resistance at 25°C and B-constant 4050K (25–50°C). It connects between VTH and COM; designers use a simple voltage divider with a known pull-up resistor to generate a temperature-proportional analog voltage sampled by an ADC. Application Note AN-1062 details linearization and fault thresholds.

Does IRSM505-084PA require external bootstrap capacitors?

No. The module integrates bootstrap diodes and relies on internal charge transfer paths. External 0.1µF ceramic capacitors are still required between each VBx and VSx pin to stabilize the floating supply, but discrete bootstrap capacitors and diodes are eliminated-reducing component count and layout sensitivity.