Infineon Technologies IR2235SPBF

Overview

IR2235SPBF from Infineon Technologies is a high-voltage, high-speed 3-phase bridge driver IC with six independent gate drive outputs (three high-side and three low-side), rated for up to 1200V offset voltage, ±420 mA/±200 mA output current, 750 ns/700 ns typical turn-on/turn-off propagation delay, and 250 ns typical deadtime-designed for IGBT or MOSFET-based motor inverters in industrial AC drives.

For engineers reviewing the IR2235SPBF datasheet, IR2235SPBF pinout, IR2235SPBF application, or IR2235SPBF equivalent, key selection considerations include its 1200V floating channel capability, integrated current-sense amplifier with trip threshold (470–670 mV), undervoltage lockout per supply rail, fault-clear input (FLT-CLR), and open-drain FAULT output signaling over-current or UVLO events.

Technical Context

The IR2235SPBF implements three independent half-bridge drivers using proprietary HVIC technology, enabling robust monolithic construction for operation up to +1200V on VS pins relative to COM. Each high-side channel features bootstrap-compatible floating supply (VB1–VB3) and matched propagation delays (750 ns ton / 700 ns toff) to minimize timing skew across phases.

It integrates an analog current amplifier (CA+, CA−, CAO) with 5–10 V/µs slew rate, 50–70 dB CMRR/PSRR, and programmable over-current shutdown via external sense resistor. Logic inputs (HIN/LIN/SD/ITRIP/FLT-CLR) are 2.5V-compatible, and all channels feature independent UVLO with hysteresis (1 V for VCC/VBS on IR2235 variants).

Key Specifications

Pinout & Package

IR2235SPBF is housed in a 28-lead SOIC (wide-body) package with gull-wing leads, designed for surface-mount assembly and thermal reliability in industrial power modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-phase high-voltage gate driver applications.

Compared with IR2233SPBF and IRS2336MPbF, the IR2235SPBF uniquely combines 1200V capability, integrated current amplifier, and dedicated fault-clear functionality-making it optimal for safety-critical, high-reliability industrial inverters requiring embedded diagnostics and fast fault recovery.

Availability

IR2235SPBF is available at Aetrix Electronics and suitable for industrial AC motor drives, solar string inverters, electric vehicle onboard chargers, and industrial UPS systems requiring stable component supply across long production lifecycles.

Supply support for IR2235SPBF 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 markets.

The IR2235SPBF belongs to Infineon's high-voltage gate driver product line, engineered specifically for ruggedized 3-phase inverter control in harsh industrial environments with high dV/dt noise and extended temperature operation.

FAQ

What is the maximum allowable dV/dt on the VS pins of the IR2235SPBF?

The IR2235SPBF is specified for 50 V/ns dV/dt immunity on its VS1–VS3 pins, verified per manufacturer test conditions. This rating ensures reliable operation in high-speed switching applications with fast-rising bus voltages, such as SiC-based inverters. The internal level-shifting circuitry and HVIC process prevent false triggering even under transient stress, eliminating need for external snubbers in most 1200V-class designs.

Can the IR2235SPBF drive both IGBTs and SiC MOSFETs effectively?

Yes-the IR2235SPBF supports gate drive voltages from 12 V to 20 V, enabling optimal bias for both 15 V IGBT gates and 18–20 V SiC MOSFET gates. Its ±420 mA low-side sink current and 700 ns turn-off delay ensure fast SiC turn-off, while the 250 ns programmable deadtime prevents shoot-through. However, external negative turn-off bias or active Miller clamp may still be required for highest-reliability SiC operation above 100 kHz.

How does the current sense amplifier (CA+, CA−, CAO) interface with a microcontroller ADC?

The CAO output delivers a rail-to-rail analog voltage (0–5 V) proportional to sensed current, with 5–10 V/µs slew rate and 50–70 dB common-mode rejection. It can connect directly to a 12-bit or higher MCU ADC input, provided the ADC sampling is synchronized to avoid switching noise. No external op-amp buffering is needed for typical 10 kSPS sampling, but a simple RC filter (e.g., 100 Ω + 1 nF) is recommended at the CAO pin to suppress high-frequency coupling.

Is the FLT-CLR function latched or auto-clearing after fault removal?

The FLT-CLR input is an active-low, edge-triggered asynchronous reset: a single low pulse ≥100 ns clears the internal fault latch and restores normal operation, provided VCC and VB supplies have recovered from undervoltage. It does not auto-clear-system firmware must assert FLT-CLR after verifying safe restart conditions (e.g., current decay, temperature stabilization). The FAULT pin remains low until cleared, enabling hardware interlock with system enable logic.