Infineon Technologies IRAM256-1067A

Overview

IRAM256-1067A from International Rectifier is a 10A, 600V integrated power module combining three Trench IGBTs and a 3-phase high-voltage gate driver in a single isolated SIP-1A package, with open-emitter outputs, thermal monitoring, and over-current protection for appliance motor drives. It delivers fail-safe operation in air conditioner and washing machine inverters with 2000VRMS isolation, CTI > 600, and 125°C max case temperature.

For engineers reviewing the IRAM256-1067A datasheet, IRAM256-1067A pinout, IRAM256-1067A application, or IRAM256-1067A equivalent, key selection criteria include RMS current rating (10A @ 25°C), short-circuit withstand time (5µs @ 25°C), bootstrap diode forward voltage (1.65V @ 1A), matched propagation delay (<75ns), and 3.3V-compatible Schmitt-trigger inputs.

Technical Context

This module integrates six IGBTs (three high-side, three low-side) and a monolithic driver IC with cross-conduction prevention logic, internal dead time (220–360ns), and independent under-voltage lockout per channel (10.4–11.6V thresholds). The driver supports 3.3V logic inputs with 310ns input filtering and provides fault reporting via FLT/EN pin with 400–800ns propagation delay.

The inverter section uses low V_CE(on) Trench IGBTs (1.5V typ @ 4A, 25°C; 1.7V @ 4A, 150°C) and fast recovery diodes (T_RR = 115ns @ 25°C, 150ns @ 150°C), enabling efficient 0.25–0.75kW motor drive operation across 85–253Vac mains. Thermal resistance is 3.5°C/W (J–C, per IGBT) on greased heatsink.

Key Specifications

Pinout & Package

IRAM256-1067A uses a thermally enhanced Single In-line Package (SIP1A) with full transfer mold structure, CTI > 600, and isolated baseplate for direct heatsink mounting. Pin numbering follows standard top-view layout with 29 terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-phase inverter module applications.

Compared with FSBB20CH60C and IRAMS20UP60B, IRAM256-1067A offers tighter propagation matching (<75ns vs ≥100ns), integrated thermistor feedback, and open-emitter flexibility-making it optimal for compact, thermally constrained appliance inverters requiring precise thermal and current protection.

Availability

IRAM256-1067A is available at Aetrix Electronics and suitable for air conditioner inverter drives, washing machine motor controllers, and refrigerator compressor modules requiring stable component supply, industrial-grade qualification, and long-term lifecycle support.

Supply support for IRAM256-1067A 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

International Rectifier (now part of Infineon Technologies) was a pioneer in power semiconductor innovation, specializing in high-efficiency switching devices for industrial and consumer power electronics.

The IRAM series was designed specifically for cost-sensitive, high-volume appliance motor drives-emphasizing integration, thermal robustness, and safety-compliant isolation in compact SIP packages.

FAQ

What is the maximum allowable DC bus voltage for continuous operation?

The IRAM256-1067A supports continuous V+ operation up to 450V, as specified in Absolute Maximum Ratings. While the IGBTs are rated for 600V blocking, sustained operation above 450V risks exceeding safe SOA limits under load transients and thermal stress, particularly at elevated case temperatures. Design margin must account for line surge and ripple.

How does the ITRIP protection function without external components?

The ITRIP pin accepts a voltage derived from a low-side shunt resistor; its internal comparator triggers shutdown when voltage exceeds 0.49V ±5%. No external op-amp or filter is needed-the module includes blanking time (100–150ns) and fault propagation logic that disables all six IGBTs within 1.5µs of threshold crossing.

Can the FLT/EN pin be used for both fault reporting and enable control?

Yes-FLT/EN is bidirectional: when pulled low externally, it disables all outputs (enable function); when released, the pin becomes an open-drain fault indicator that pulls low upon overcurrent, overtemperature, or UVLO. Internal pull-up ensures default-enable behavior if left unconnected, but active-low microcontroller GPIO is recommended for controlled startup.

What thermal interface material is recommended for heatsink mounting?

A greased flat surface with thermal compound conductivity ≥1W/mK is required per datasheet. Recommended materials include Shin-Etsu G746 or Dow Corning TC-5122; minimum mounting torque is 0.8Nm (M3 screw), and heatsink flatness must be maintained between −50µm and +100µm to ensure uniform pressure and avoid localized hot spots under 125°C case operation.