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International Test Instruments Corporation IRMCK171TR
- Part No.:
- IRMCK171TR
- Manufacturer:
- International Test Instruments Corporation
- Category:
- Motor Drivers, Controllers
- Package:
- 48-LQFP
- Datasheet:
-
IRMCK171TR.pdf
- Description:
- AC MOTOR CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:49,250
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Product details
Overview
IRMCK171TR from International Rectifier is a high-performance, one-time programmable (OTP) motion control IC integrating a Flexible Motion Control Engine (MCETM) and an 8-bit 8051 microcontroller on a single monolithic chip for sensorless permanent magnet and induction motor control in appliance inverters. It supports single-shunt or leg-shunt current reconstruction, 12-bit/2 µs ADC, 20-bit PWM carrier resolution, and operates from a 3.3 V supply with 60 mA max current.
For engineers reviewing the IRMCK171TR datasheet, IRMCK171TR pinout, IRMCK171TR application, or IRMCK171TR equivalent, key selection criteria include MCETM-based sensorless algorithm execution, OTP ROM size (32 KB), QFP48 package compatibility, dual shunt current sensing capability, and UART/I²C/SPI interface support for host communication and firmware coordination.
Technical Context
The IRMCK171TR implements a dedicated hardware-accelerated Motion Control Engine (MCETM) that executes pre-defined sensorless control blocks-including Angle Estimator-without CPU intervention, enabling real-time field-oriented control at up to 128 MHz system clock. Its dual-domain architecture separates motion-critical computation (MCETM) from supervisory tasks (8051 core), ensuring deterministic timing for SVPWM generation and current sampling.
It integrates analog front-end circuitry optimized for single-shunt current reconstruction, including dedicated op-amps and comparator paths for Itrip detection, plus synchronized 7-channel 12-bit ADC with 2 µs conversion time and hardware-triggered capture aligned to PWM cycles for precise rotor position estimation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max SYSCLK | 128 MHz - enables high-bandwidth closed-loop control with sub-microsecond interrupt latency |
| MCETM data width | 16-bit signed - supports high-precision angle and torque calculations without overflow in FOC algorithms |
| ADC channels/resolution | 7 × 12-bit - provides simultaneous voltage/current feedback for 3-phase motor control with harmonic rejection |
| PWM carrier resolution | 20 bits / SYSCLK - delivers fine-grained duty-cycle control for low-acoustic-noise sinusoidal drive |
| OTP ROM size | 32 KB - stores fully compiled sensorless motion control firmware with no external memory required |
| Digital I/O count | 10 pins - supports GPIO, RESET, GATEKILL, CAPTURE, and serial interface signals in QFP48 layout |
| Operating supply | 3.3 V ±5% - compatible with standard logic-level power domains and reduces level-shifting complexity |
Pinout & Package
IRMCK171TR is housed in a lead-free 48-pin Quad Flat Package (QFP) with 0.5 mm pitch, 7 mm × 7 mm body, and exposed thermal pad. Pin assignment follows standardized peripheral grouping: 8051 I/O (P0–P3), motion peripherals (PWMUL/UH/VL/VH/WL/WH, IFB+, IFB−, IFBO), analog inputs (AIN5+, AIN5−, AIN5O), power (VDD1, VDDCAP, VSS, AVSS), and test/debug (XTAL0/1, TCK/TMS/TDO/TDI, VPP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWMUL/PWMUH | Upper-leg PWM outputs | Drive high-side gate drivers for U-phase inverter leg with complementary dead-time control |
| IFB+/IFB− | Single-shunt current sense inputs | Differential input for reconstructing phase currents using internal op-amp and comparator circuitry |
| AIN5+/AIN5− | Analog voltage sensing inputs | High-impedance differential pair for DC bus or motor terminal voltage monitoring |
| VPP | OTP programming voltage | 12.5 V input required during factory programming; not used in normal operation |
| TCK/TMS/TDO/TDI | JTAG debug interface | Enables full emulation, breakpoint debugging, and flash-like development workflow via 8051 core |
Key Features
| Feature | Design Value |
|---|---|
| Flexible Motion Control Engine (MCETM) | Hardware-accelerated, graphically programmable engine executing sensorless FOC without CPU overhead |
| Single-shunt current reconstruction | Integrated analog circuitry eliminates need for external op-amps or ADCs in cost-sensitive inverter designs |
| Loss-minimization SVPWM | On-the-fly space vector modulation with automatic harmonic injection to reduce copper and iron losses |
| Two-channel analog PWM output | 8-bit resolution outputs usable for auxiliary control signals or analog setpoint interfaces |
| UART/I²C/SPI interfaces | Simultaneous multi-protocol support enables host MCU coordination, parameter tuning, and diagnostics |
Applications
| Washing Machine Drive | Refrigerator Compressor |
|---|---|
Use Scenario: Variable-speed direct-drive drum motor with vibration suppression and water-level adaptive torque control. IC Role / Device Role / Timing Role: Primary sensorless motion controller executing real-time FOC, current reconstruction, and thermal derating logic. Use Value: Enables >90% efficiency across 100–8000 RPM range while eliminating Hall sensors and reducing BOM by two op-amps and one ADC. | Use Scenario: Hermetic compressor with start-up torque boost, oil return management, and refrigerant pressure compensation. IC Role / Device Role / Timing Role: Closed-loop speed regulator with adaptive flux-weakening and overcurrent protection triggered within 2 µs of fault detection. Use Value: Achieves 30% lower acoustic noise vs. trapezoidal drives and supports UL60730 Class B safety compliance via hardware-based GATEKILL assertion. |
| Induction Fan Motor | Dishwasher Circulation Pump |
Use Scenario: High-static-pressure axial fan requiring wide speed range (200–5000 RPM), soft-start, and stall detection. IC Role / Device Role / Timing Role: Sensorless induction motor controller using rotor time-constant adaptation and slip compensation. Use Value: Delivers stable torque down to 5% rated speed without encoder, validated per IEC 60034-30 IE3 efficiency requirements. | Use Scenario: High-head centrifugal pump with variable flow demand, anti-cavitation control, and dry-run protection. IC Role / Device Role / Timing Role: Integrated motion + system supervisor managing pump speed, temperature monitoring, and EEPROM-stored calibration tables. Use Value: Reduces system latency to <100 µs for pressure transient response and enables field-upgradable control algorithms via UART. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sensorless motor control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRMCF171 | 64 KB Flash RAM instead of 32 KB OTP ROM; identical pinout and peripheral set | Intended for development and prototyping only; not qualified for volume production | Select IRMCF171 for algorithm iteration and IRMCK171TR for final production due to OTP security and qualification status |
| STSPIN32F0A | ARM Cortex-M0+ core, integrated gate driver, no dedicated MCETM hardware acceleration | Requires full software implementation of sensorless observer; higher CPU load and longer loop latency | Choose STSPIN32F0A only when gate driver integration is prioritized over deterministic motion control timing |
Compared with IRMCF171, IRMCK171TR offers production-grade OTP security and lower unit cost; compared with STSPIN32F0A, it delivers superior real-time performance for complex sensorless algorithms but requires external gate drivers and discrete power stage design.
Availability
IRMCK171TR is available at Aetrix Electronics and suitable for washing machine drives, refrigerator compressors, induction fans, and dishwasher circulation pumps requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade reliability.
Supply support for IRMCK171TR 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 since 2015) specialized in power semiconductors and intelligent power modules, with deep expertise in motor control ICs and high-efficiency power conversion systems.
The IRMCK171 product line was developed specifically for cost-sensitive, high-volume white goods applications requiring robust sensorless motor control without external processors or memory, targeting appliance OEMs seeking turnkey inverter solutions.
FAQ
What programming tools are required for IRMCK171TR?
Programming requires MATLAB/Simulink with the IRMCK171 graphical compiler toolchain. Users construct control algorithms visually using pre-verified blocks (e.g., Angle Estimator, SVPWM generator), then compile to OTP-compatible binary. No C coding or low-level register configuration is needed for motion control logic.
Does IRMCK171TR support both PMSM and induction motors?
Yes - the MCETM includes dedicated, configurable control blocks for both interior/surface permanent magnet synchronous motors and induction machines. Motor type selection is made during graphical compilation, and parameters like rotor time constant or d/q-axis inductance are entered directly into the Simulink model.
Can IRMCK171TR operate without an external crystal?
No - it requires an external 60 MHz crystal connected to XTAL0/XTAL1 pins to generate the base clock. Internal PLL multiplies this to 128 MHz SYSCLK; no internal RC oscillator is provided, ensuring timing accuracy critical for sensorless position estimation.
What is the role of the GATEKILL pin?
GATEKILL is a hardware fault signal that immediately disables all six PWM outputs within 200 ns when asserted, independent of software or MCETM state. It connects directly to external overcurrent or overtemperature protection circuits to ensure fail-safe shutdown compliant with IEC 61800-5-2.
IRMCK171TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- International Test Instruments Corporation
- Series:
- MCE™
- Package/Case:
- 48-LQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- AC, Induction, Synchronous
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Half Bridge (3)
- Interface:
- I2C, RS-232, SPI
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- Appliance
- Current - Output:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFP
IRMCK171TR FAQ
1.How can I place an order for IRMCK171TR through Aetrix?
Please submit a Request for Quotation (RFQ) for IRMCK171TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for IRMCK171TR reliable?
The price and inventory of IRMCK171TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRMCK171TR is usually 5 days.
3.What payment methods are accepted for IRMCK171TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRMCK171TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRMCK171TR?
IRMCK171TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRMCK171TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for IRMCK171TR?
For technical support, including IRMCK171TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRMCK171TR requirements.
6.How does Aetrix verify that IRMCK171TR is sourced from the original manufacturer or authorized distributors?
All IRMCK171TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IRMCK171TR meets industry standards.
7.What is the process for return or replacement of IRMCK171TR?
All IRMCK171TR units undergo pre-shipment inspection (PSI). If there is an issue with IRMCK171TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The IRMCK171TR part is unused and in its original packaging.
Return procedure for IRMCK171TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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