Infineon Technologies IRAM256-1567A

Overview

IRAM256-1567A from International Rectifier is a 15A, 600V integrated power hybrid IC in a SIP1A package, combining three Trench IGBTs, bootstrap diodes, and a 3.3V-compatible 3-phase high-voltage gate driver with open-emitter outputs. It delivers fail-safe motor drive for AC compressors and washing machine inverters, featuring built-in temperature monitoring (NTC), over-current protection via ITRIP pin, and 2000VRMS isolation.

For engineers reviewing the IRAM256-1567A datasheet, IRAM256-1567A pinout, IRAM256-1567A application, or IRAM256-1567A equivalent, key selection criteria include RMS current rating (15A @ TC=25°C), short-circuit withstand time (5µs @ TJ=25°C), matched propagation delay (<75ns), CTI >600 insulation, and integrated thermal sensing with R25=47kΩ NTC.

Technical Context

The IRAM256-1567A integrates six-channel gate driving logic with cross-conduction prevention, internal dead-time generation (220–360ns), and Schmitt-triggered 3.3V logic inputs. Its driver core supports simultaneous high-side floating supply (VB1–VB3 up to 600V) and low-side referenced control (VCC=13.5–16.5V), enabling direct microcontroller interfacing without level-shifting.

Each half-bridge uses short-circuit-rated Trench IGBTs (VCE(ON)=1.5V @ 5A, 25°C) with reverse-biased SOA rated at 600V/30A, and fast recovery diodes (TRR=115ns @ 25°C). Protection functions include under-voltage lockout on VCC/VB (10.9V threshold), ITRIP-based current shutdown (0.49V threshold), and EN/FLT bidirectional fault signaling.

Key Specifications

Pinout & Package

IRAM256-1567A uses a thermally enhanced Single In-line Package (SIP1A) with full transfer mold structure and isolated baseplate. The 29-pin layout provides three half-bridge outputs (U/V/W), dedicated high-side floating supplies (VB1–VB3), low-side emitter returns (VRU/VRV/VRW), and integrated protection/control signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IFX9201SB and STGIPQ5C60, the IRAM256-1567A uniquely combines open-emitter outputs, factory-matched propagation delay, and integrated NTC in a single SIP package-enabling simpler, more reliable motor control for appliance-grade 1kW inverters without design compromises.

Availability

IRAM256-1567A is available at Aetrix Electronics and suitable for air conditioner compressor drives, washing machine motor controls, and refrigeration fan inverters requiring stable component supply across multi-year production programs.

Supply support for IRAM256-1567A 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 IGBTs, MOSFETs, and intelligent power modules for industrial and consumer applications.

The IRAM series targets appliance motor drives, integrating trench IGBTs, gate drivers, and protection into thermally optimized packages to simplify inverter design while meeting stringent safety and reliability standards.

FAQ

What is the maximum recommended PWM frequency for IRAM256-1567A?

The absolute maximum PWM carrier frequency is 20kHz, as specified in the Absolute Maximum Ratings table. At this frequency, thermal dissipation remains within limits when operated at ≤15A RMS with proper heatsinking (RTH(J–C)=3.2°C/W). Operating above 20kHz increases switching losses disproportionately and risks exceeding TJ=150°C under load.

How does the ITRIP pin function during over-current events?

The ITRIP pin accepts an analog voltage from a current-sense resistor network; a threshold of 0.49V triggers immediate shutdown of all six IGBTs within 1.5µs. A 150ns blanking time prevents false triggering during turn-on transients, and the FLT/EN pin asserts low to signal fault condition to the host controller.

Can IRAM256-1567A be used with 3.3V-only microcontrollers without level shifters?

Yes-the HIN/LIN inputs are Schmitt-triggered and fully compatible with 3.3V logic: VIN,TH+ is 2.5V min and VIN,TH− is 0.8V max, ensuring noise-immune recognition of standard CMOS outputs. No external level shifting is needed for direct connection to STM32, PIC32, or similar MCUs.

What is the purpose of the separate VRU, VRV, and VRW pins?

These pins provide individual low-side emitter return paths for each phase, enabling independent current sensing using shunt resistors placed between VRx and COM. This architecture avoids shared-path errors and supports advanced control algorithms like active damping and harmonic injection in PMSM drives.