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International Test Instruments Corporation IR22771SPBF
- Part No.:
- IR22771SPBF
- Manufacturer:
- International Test Instruments Corporation
- Category:
- Current Regulation/Management
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
IR22771SPBF.pdf
- Description:
- IC CURRENT SENSE 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:150,480
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Product details
Overview
IR22771SPBF from Infineon Technologies is a high-voltage, single-phase phase current sensor IC designed for AC motor drive systems. It features a floating channel rated to 1200 V, synchronous sampling with <7.5 µs sensing latency at 20 kHz, digital PWM output, fast overcurrent detection (±470 mV threshold), and support for bootstrap power supplies - enabling precise current monitoring in IGBT-based inverter legs.
For engineers reviewing the IR22771SPBF datasheet, IR22771SPBF pinout, IR22771SPBF application, or IR22771SPBF equivalent, this device is selected for high-noise industrial motor control where accurate, low-latency shunt-based current feedback and integrated overcurrent protection are critical design requirements.
Technical Context
The IR22771SPBF implements a high-precision analog-to-time conversion architecture with built-in ripple rejection, converting differential input voltage (±250 mV) across an external shunt into a duty-cycle-modulated PWM signal. Its floating high-side domain (VB–VS up to 1200 V) is powered via bootstrap supply (8–20 V), and it uses synchronous sampling triggered by an external SYNC signal (4–20 kHz).
It delivers 40 ksample/sec throughput with group delay ≤4 µs and includes a dedicated open-drain OC output that asserts within ≤3.5 µs of overcurrent event detection. The gain-select pins G0/G1 configure integrator range, and PO/OC outputs feature internal pull-downs with specified Ron (25–75 Ω) and threshold hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Floating Voltage | 1200 V (supports IGBT half-bridge operation up to 1200 V DC bus) |
| Sensing Latency | <7.5 µs @20 kHz (enables real-time current feedback in high-frequency PWM motor control) |
| Input Range | ±250 mV (matches standard 5–10 mΩ shunt resistors at 25–50 A full-scale) |
| OC Threshold | ±470 mV (configurable trip point for fast IGBT short-circuit protection) |
| Throughput | 40 ksample/sec (sufficient for asymmetrical PWM up to 20 kHz switching) |
| Bootstrap Supply | 8–20 V (compatible with standard gate driver bootstrap diode/capacitor networks) |
| Quiescent Current | 2.2 mA max on VBS (minimizes bootstrap capacitor discharge between PWM cycles) |
Pinout & Package
IR22771SPBF is housed in a 16-pin SOIC wide-body (SOIC16WB) package with creepage-enhanced spacing for high-voltage isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Low-side logic supply | Provides 8–20 V power to internal digital logic and OC/PO drivers |
| 3 VSS | Low-side ground reference | Common return for VCC, Sync, G0/G1, OC, and PO signals |
| 6 OC | Open-drain overcurrent flag | Asserts low within ≤3.5 µs when |Vin| exceeds ±470 mV; requires external pull-up |
| 7 PO | Open-drain PWM output | Duty-cycle modulated output (0–100%) representing sensed current; gain configurable via G0/G1 |
| 8 Sync | External synchronization input | Accepts 4–20 kHz TTL/CMOS-level trigger to align sampling with PWM period |
| 11 G0 / 12 G1 | Integrator gain select bits | Set full-scale range: 00=±125 mV, 01=±250 mV, 10=±500 mV, 11=±1000 mV |
| 13 VS | High-side floating ground | Return node for high-side domain; referenced to VB; withstands 1200 V offset vs VSS |
| 14 VIN− / 15 VIN+ | Differential current sense inputs | Accept ±250 mV full-scale differential voltage from external shunt resistor |
| 16 VB | High-side floating supply | Bootstrap-supplied rail powering high-side circuitry; operates 8–20 V above VS |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Sampling Architecture | Eliminates aliasing and enables deterministic timing alignment with PWM cycle via external Sync input |
| High Common-Mode Rejection | 0.2 m%/V CMRR at 600 V offset ensures accuracy despite high dVS/dt noise in inverter legs |
| Digital PWM Output | Time-domain encoding avoids ADC quantization error and provides inherent noise immunity in noisy EMI environments |
| Fast Overcurrent Detection | ≤3.5 µs OC assertion time allows safe shutdown before IGBT thermal runaway in short-circuit events |
| Configurable Input Range | G0/G1 pins select ±125/±250/±500/±1000 mV full-scale, supporting multiple shunt values without hardware change |
Applications
| Industrial AC Motor Drives | EV Traction Inverters |
|---|---|
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase induction motors in HVAC compressors and pumps. IC Role / Device Role / Timing Role: High-side phase current sensor providing synchronized, low-latency feedback to DSP/FPGA for torque and flux regulation. Use Value: Enables <7.5 µs current loop update at 20 kHz PWM, improving dynamic response and reducing torque ripple under load transients. | Use Scenario: Real-time phase current monitoring in 400 V battery-powered traction inverters for light electric vehicles. IC Role / Device Role / Timing Role: Isolated current interface between 1200 V IGBT half-bridge and low-voltage controller, with OC signal directly feeding fault management logic. Use Value: 1200 V floating capability eliminates need for external isolation amplifiers, reducing BOM cost and PCB area while maintaining safety compliance. |
| Solar String Inverters | UPS Systems |
Use Scenario: DC-link and AC output current sensing in transformerless grid-tied solar inverters with bipolar modulation. IC Role / Device Role / Timing Role: High-common-mode-rejection current sensor for both positive and negative half-cycle sampling in H-bridge topologies. Use Value: 0.2 m%/V CMRR ensures stable measurement despite rapid VS slew rates (>50 V/ns) during zero-crossing transitions. | Use Scenario: Phase current monitoring in double-conversion online UPS systems with active PFC and inverter stages. IC Role / Device Role / Timing Role: Dual-role sensor: provides feedback for inverter current control and fast OC detection for bypass switching during overload/fault conditions. Use Value: Integrated OC output with ≤3.5 µs response enables sub-microsecond fault isolation, meeting UL 1778 short-circuit withstand requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phase current sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR21771SPBF | Floating voltage rating limited to 600 V; identical pinout, timing, and functional architecture | Suitable only for 600 V-class inverters (e.g., low-voltage industrial drives, appliances) | Select when system DC bus ≤600 V and cost sensitivity outweighs future voltage scalability needs |
| AD8418AARZ | Galvanically isolated amplifier (not floating-channel); fixed gain (20 V/V); analog output; no integrated OC signal | Requires external comparator and isolation for OC; used where analog feedback is preferred over PWM encoding | Choose when system already uses isolated analog signal chains and demands ultra-low offset drift (<5 µV/°C) |
Compared with IR21771SPBF, IR22771SPBF extends voltage capability to 1200 V without changing layout or firmware; versus AD8418AARZ, it eliminates external components for OC protection and provides inherent noise-immune digital output but lacks analog precision for calibration-critical applications.
Availability
IR22771SPBF is available at Aetrix Electronics and suitable for industrial AC motor drives, EV traction inverters, solar string inverters, and UPS systems requiring stable component supply and long-term production continuity.
Supply support for IR22771SPBF 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 German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy applications.
The IR22771SPBF belongs to Infineon's high-voltage current sensor IC product line, engineered specifically for robust, isolated current feedback in high-dV/dt motor inverter applications without external isolation components.
FAQ
What is the minimum required bootstrap supply voltage for reliable operation?
The IR22771SPBF requires a minimum VBS voltage of VS + 8.0 V per the Recommended Operating Conditions table. With VS referenced to VSS, this means the bootstrap supply must maintain ≥8 V headroom above the high-side floating ground potential. Below this, internal biasing fails and PO/OC outputs become undefined.
Can the Sync input be driven directly from a microcontroller GPIO?
Yes - the Sync input accepts standard TTL/CMOS logic levels (VIH ≥2.2 V, VIL ≤0.8 V) and includes internal 6–12 kΩ pull-down resistance. It supports frequencies from 4 to 20 kHz and exhibits 0.2 V hysteresis, making it compatible with most MCU timer outputs without external conditioning.
How does the G0/G1 pin configuration affect measurement resolution?
G0/G1 set the full-scale input range (±125/±250/±500/±1000 mV), not resolution. The PWM output duty cycle remains linear across the selected range; effective resolution depends on downstream controller's ability to measure pulse width. At ±250 mV full-scale, 1 LSB corresponds to ~12.2 mV with 16-bit capture at 20 kHz.
Is external filtering required on the VIN+ and VIN− inputs?
No external RC filter is required - the internal analog front-end includes optimized anti-aliasing and ripple rejection circuitry. However, layout best practices mandate symmetric, short, shielded traces between shunt and VIN+/VIN−, with local 100 nF ceramic decoupling at the IC pins to suppress high-frequency coupling.
IR22771SPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- International Test Instruments Corporation
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Current Sense
- Sensing Method:
- -
- Accuracy:
- -
- Voltage - Input:
- 8V ~ 20V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
IR22771SPBF FAQ
1.How can I place an order for IR22771SPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR22771SPBF 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 IR22771SPBF reliable?
The price and inventory of IR22771SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR22771SPBF is usually 5 days.
3.What payment methods are accepted for IR22771SPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR22771SPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR22771SPBF?
IR22771SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR22771SPBF 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 IR22771SPBF?
For technical support, including IR22771SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR22771SPBF requirements.
6.How does Aetrix verify that IR22771SPBF is sourced from the original manufacturer or authorized distributors?
All IR22771SPBF 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 IR22771SPBF meets industry standards.
7.What is the process for return or replacement of IR22771SPBF?
All IR22771SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR22771SPBF, 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 IR22771SPBF part is unused and in its original packaging.
Return procedure for IR22771SPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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