Infineon Technologies IR2177SPBF

Overview

IR2177SPBF from Infineon Technologies is a high-voltage, single-phase current sensor IC for AC motor drives, featuring floating channel operation up to 600 V, <7.5 µs sensing latency at 20 kHz, ratiometric analog output (OUT), digital PWM output (PO), and fast overcurrent detection (OC) with ±470 mV threshold. It interfaces with external shunt resistors and supports bootstrap power supplies in IGBT gate driver circuits.

For engineers reviewing the IR2177SPBF datasheet, IR2177SPBF pinout, IR2177SPBF application, or IR2177SPBF equivalent, this device is selected for precision phase current sensing in variable-frequency drives, where low group delay, high common-mode rejection (100 dB for OUT), and synchronous sampling under high dV/dt noise are critical design requirements.

Technical Context

The IR2177SPBF implements a synchronous sampling measurement system that converts differential shunt voltage (±250 mV) into time-interval-modulated outputs-both PWM (PO) and ratiometric analog (OUT)-with precise ripple rejection and minimal group delay (~4 µs). Its floating channel architecture enables direct high-side sensing referenced to VS, supporting bootstrap-fed half-bridge topologies.

It features dual output formats: PO delivers gain-stable PWM (−40.5 %/V typ.) with CMRR of 0.2 m%/V against VS offset, while OUT provides analog output with 0.3–0.7% linearity and PSRR of 30–100 dB. OC signal asserts within 2.7–4.7 µs for IGBT protection, with internal hysteresis and open-collector drive.

Key Specifications

Pinout & Package

IR2177SPBF is housed in an 8-pin SOIC package (SOIC-8, 150 mil width) with creepage-optimized layout for high-voltage isolation. Pin functions are validated per Infineon PD60233 revB datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage current sensing applications.

Compared with ACS724LLCTR-20AU-T and INA240A1QPWRQ1, IR2177SPBF uniquely integrates synchronous sampling, dual-format output, 600 V floating operation, and fast OC in one SOIC-8 package-making it irreplaceable for compact, high-performance AC motor drives requiring tight timing alignment and noise resilience.

Availability

IR2177SPBF is available at Aetrix Electronics and suitable for industrial variable-frequency drives, appliance motor controllers, and e-bike power stages requiring stable component supply, long-term lifecycle support, and traceable sourcing for high-reliability production.

Supply support for IR2177SPBF 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 management, automotive electronics, and industrial control ICs, with leadership in high-voltage analog and mixed-signal solutions.

The IR2177SPBF belongs to Infineon's high-voltage current sensor product line, designed specifically to replace discrete op-amp/comparator solutions in AC motor drives-delivering integrated timing alignment, noise immunity, and dual-output flexibility in a single chip.

FAQ

What is the maximum allowable dV/dt at the VS pin?

The IR2177SPBF is rated for 50 V/ns dV/dt at the VS pin under recommended operating conditions. This specification ensures reliable operation during fast IGBT or MOSFET switching transitions in 600 V motor inverters, preventing false triggering or latch-up due to capacitive coupling into the floating domain.

Can IR2177SPBF operate with a 5 V VCC supply?

No-IR2177SPBF requires VCC between 8 V and 20 V. A 5 V supply falls below the minimum operating voltage and will prevent proper internal biasing of logic and output drivers, resulting in undefined behavior or failure to assert OC/PO signals.

How does the ratiometric analog output (OUT) scale with reference voltage?

The OUT voltage is ratiometric to VR = VRH – VRL, with nominal gain of −20% to +20% of VR. For example, with VR = 3 V, OUT ranges from −0.6 V to +0.6 V for ±250 mV input-ensuring output accuracy remains tied to reference stability rather than VCC or internal bandgap drift.

Is external filtering required on the SYNC input?

No external filtering is required-the SYNC input includes an internal Schmitt trigger with 0.2 V hysteresis and a 6–12 kΩ internal pull-down resistor. Clean TTL- or CMOS-level edges (0.8 V low / 2.2 V high) directly from MCU timers are sufficient for reliable synchronization.