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Infineon Technologies IR2175STR
- Part No.:
- IR2175STR
- Manufacturer:
- Infineon Technologies
- Category:
- Current Regulation/Management
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IR2175STR.pdf
- Description:
- IC CURRENT SENSE 0.5% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,379
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Product details
Overview
IR2175STR from Infineon Technologies (formerly International Rectifier) is a monolithic linear current sensing IC for motor phase current monitoring in high-voltage inverter drives. It features ±260 mV input range, 130 kHz carrier frequency, 20 ppm/°C gain drift, 600 V offset voltage rating, and open-drain PWM/OC outputs. It converts shunt-based analog current signals into discrete PWM for direct MCU interface in 3-phase BLDC or PMSM drives.
For engineers reviewing the IR2175STR datasheet, IR2175STR pinout, IR2175STR application, or IR2175STR equivalent, key selection criteria include floating channel capability up to +600 V, independent overcurrent trip with 2 µs delay, ±260 mV input compliance, 155–165 %/V gain, and SOIC-8 lead-free packaging compatible with industrial motor control BOMs.
Technical Context
The IR2175STR integrates a high-side floating channel with proprietary isolation technology enabling direct sensing of motor phase current referenced to VS (up to +600 V offset). Its internal oscillator generates a fixed 130 kHz carrier, modulated by VIN+ to produce duty-cycle-proportional PWM output.
It delivers two independent digital outputs: PO (PWM, open-drain) and OC (overcurrent trip, active-low, open-drain), both compatible with 3.3 V to 15 V logic interfaces. Input offset voltage is ±10 mV at 25°C, with 25 µV/°C drift; linearity error is ≤1% across ±260 mV input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Range | ±260 mV - matches typical shunt resistor voltage drop at rated motor current |
| Carrier Frequency | 130 kHz (typ.) - sets PWM resolution and anti-aliasing bandwidth for current feedback |
| Gain | 160 %/V (typ.) - maps full-scale input to 9%–91% PWM duty cycle range |
| Overcurrent Delay | 2 µs (typ.) - enables fast IGBT short-circuit protection before device failure |
| VOFFSET Max | 600 V - supports high-side switching in 400 V DC bus motor inverters |
| IQBS | 2 mA - enables bootstrap supply operation without external LDO or charge pump |
| Gain Temp Drift | 20 ppm/°C (typ.) - limits current measurement error to <0.3% over –40°C to +125°C |
Pinout & Package
IR2175STR is supplied in an 8-lead SOIC package (JEDEC MS-012AA), RoHS-compliant and lead-free. Pin 1 is marked with a dot; package dimensions: 5.00 × 4.00 × 1.75 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Low-side logic supply | Provides 9.5–20 V power to internal logic and OC output stage |
| OC | Overcurrent trip output | Open-drain, active-low signal triggered when |VIN+| > 260 mV |
| PO | PWM output | Open-drain digital PWM with duty cycle proportional to VIN+ |
| COM | Logic ground reference | Return path for VCC and OC/PO logic; isolated from high-side VS |
| N.C. | No connection | Unused pin; must be left unconnected or tied to COM per layout guidelines |
| VS | High-side floating return | Reference node for VIN+; floats up to +600 V above COM |
| VIN+ | Current sense input | Differential input referenced to VS; accepts ±260 mV shunt voltage |
| VB | High-side floating supply | Provides bias to high-side circuitry; requires bootstrap capacitor between VB and VS |
Key Features
| Feature | Design Value |
|---|---|
| Floating channel isolation | Supports +600 V offset between VS and COM - enables direct high-side phase current sensing |
| Discrete PWM output | Eliminates need for external ADC or optocoupler - reduces system cost and latency |
| Independent OC signal | 2 µs propagation delay - provides deterministic fault response for IGBT desaturation protection |
| Wide logic interface range | Open-drain outputs compatible with 3.3 V, 5 V, and 15 V controllers - simplifies level-shifting |
| Low IQBS | 2 mA quiescent current - allows reliable bootstrap capacitor recharge in 10–20 kHz PWM systems |
Applications
| Industrial Inverter Drives | BLDC Motor Controllers |
|---|---|
Use Scenario: Three-phase inverter driving 400 V DC bus industrial pumps and compressors. IC Role / Device Role / Timing Role: High-side phase current sensor feeding real-time feedback to FPGA-based space-vector PWM generator. Use Value: 130 kHz carrier enables 7.7 µs current update interval; ±260 mV input range matches 5 mΩ shunt at 52 A peak. | Use Scenario: Sensorless BLDC drive in HVAC fan modules with thermal-limited IGBTs. IC Role / Device Role / Timing Role: Dedicated overcurrent monitor triggering immediate gate shutdown on phase-to-ground fault. Use Value: 2 µs OC propagation ensures IGBT desaturation protection within safe SOA limits at 1200 V bus. |
| PMSM Servo Amplifiers | Appliance Motor Control |
Use Scenario: High-bandwidth position-controlled servo using field-oriented control (FOC). IC Role / Device Role / Timing Role: Analog current feedback digitized as PWM for synchronous sampling with encoder timing. Use Value: 20 ppm/°C gain drift maintains <0.3% current loop accuracy across –25°C to +85°C ambient. | Use Scenario: Cost-sensitive washing machine main drive with single shunt resistor topology. IC Role / Device Role / Timing Role: Low-side current sensing alternative via VS-referenced configuration with COM-connected shunt. Use Value: Open-drain PO/OC outputs interface directly to 3.3 V MCU GPIO without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS712ELCTR-20A-T | Galvanically isolated Hall-effect sensor; 20 A range; analog output; no PWM or OC signal | Requires external ADC and fault logic; lower bandwidth (80 kHz) but no bootstrap dependency | Preferred where board space permits larger SOIC-8 package and isolation is mandatory |
| INA240A1D | Bi-directional current sense amplifier; 80 V common-mode; differential analog output; no integrated oscillator or PWM | Needs external PWM modulator (e.g., UC384x) and separate comparator for overcurrent | Chosen when higher precision (<0.1% gain error) and rail-to-rail output are required over integration |
Compared with ACS712ELCTR-20A-T and INA240A1D, IR2175STR uniquely combines high-voltage floating sensing, self-contained PWM generation, and dedicated fast OC output - reducing component count and PCB area in compact inverter designs.
Availability
IR2175STR is available at Aetrix Electronics and suitable for industrial inverter drives, BLDC motor controllers, PMSM servo amplifiers, and appliance motor control requiring stable component supply and long-term production continuity.
Supply support for IR2175STR 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 global semiconductor leader specializing in power management, automotive, and industrial control solutions, with core expertise in high-voltage ICs and motor drive systems.
The IR2175STR belongs to Infineon's legacy IR high-voltage analog interface product line, designed specifically for robust, low-latency current feedback in cost-sensitive, high-reliability motor inverters.
FAQ
What is the recommended bootstrap capacitor value for IR2175STR?
A 0.1 µF ceramic capacitor rated ≥25 V is recommended between VB and VS pins. This value ensures sufficient charge storage for 130 kHz carrier operation with ≤2 mA IQBS, maintaining stable high-side bias under 20 kHz PWM switching with 50% duty cycle. Larger values (e.g., 0.22 µF) improve margin at higher ambient temperatures.
Can IR2175STR sense bidirectional current?
Yes - IR2175STR accepts differential input voltage from –260 mV to +260 mV relative to VS, enabling bidirectional current measurement through a center-tapped or dual-shunt configuration. The resulting PWM duty cycle ranges from 9% (–260 mV) to 91% (+260 mV), with 50% representing zero current.
How does the IR2175STR handle input overvoltage conditions?
The device includes internal input overvoltage protection that clamps VIN+ to approximately ±5 V during IGBT short-circuit events, preventing damage to the front-end amplifier. This protection activates when |VIN+| exceeds ±260 mV by more than 10×, and is specified in Absolute Maximum Ratings as ±5 V input limit.
Is IR2175STR pin-compatible with IR2175S?
Yes - IR2175STR and IR2175S share identical pinout, electrical specifications, and SOIC-8 package footprint. The "STR" suffix denotes tape-and-reel packaging for automated assembly; "S" denotes standard tube packaging. Both are lead-free and functionally interchangeable in design.
IR2175STR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Current Sense
- Sensing Method:
- -
- Accuracy:
- ±0.5%
- Voltage - Input:
- 9.5V ~ 20V
- Current - Output:
- 20mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
IR2175STR FAQ
1.How can I place an order for IR2175STR through Aetrix?
Please submit a Request for Quotation (RFQ) for IR2175STR 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 IR2175STR reliable?
The price and inventory of IR2175STR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR2175STR is usually 5 days.
3.What payment methods are accepted for IR2175STR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR2175STR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR2175STR?
IR2175STR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR2175STR 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 IR2175STR?
For technical support, including IR2175STR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR2175STR requirements.
6.How does Aetrix verify that IR2175STR is sourced from the original manufacturer or authorized distributors?
All IR2175STR 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 IR2175STR meets industry standards.
7.What is the process for return or replacement of IR2175STR?
All IR2175STR units undergo pre-shipment inspection (PSI). If there is an issue with IR2175STR, 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 IR2175STR part is unused and in its original packaging.
Return procedure for IR2175STR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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