Infineon Technologies IRS2109C

Overview

IRS2109C from Infineon Technologies is a high-voltage, high-speed MOSFET gate driver IC for half-bridge configurations, featuring 600 V high-side voltage rating, 200 ns typical propagation delay, and independent high- and low-side outputs. It drives N-channel MOSFETs in motor control inverters and DC-DC resonant converters.

For engineers reviewing the IRS2109C datasheet, IRS2109C pinout, IRS2109C application, or IRS2109C equivalent, key selection considerations include bootstrap-based high-side drive capability, under-voltage lockout thresholds (VCC = 10–20 V, VB = 12–20 V), and integrated dead-time generation to prevent shoot-through.

Technical Context

The IRS2109C integrates a level-shifted high-side driver with floating channel architecture, enabling operation up to 600 V referenced to ground. It uses a self-oscillating bootstrap diode charge circuit and features non-latching UVLO on both VCC and VB supplies.

Logic inputs accept 3.3 V/5 V TTL-compatible signals, and output drivers deliver ±2 A peak source/sink current with matched propagation delays (t_PHL/t_PLH ≤ 30 ns mismatch) to ensure precise timing control in PWM-driven half-bridge topologies.

Key Specifications

Pinout & Package

IRS2109C is housed in an 8-pin SOIC package with exposed thermal pad (SOIC-8EP), optimized for surface-mount assembly and thermal dissipation in compact power stages.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge gate driver applications.

Compared with IR2104S and FAN7382MX, the IRS2109C delivers superior timing accuracy, dual-supply UVLO monitoring, and integrated dead-time generation-making it optimal for compact, high-reliability half-bridge designs operating above 200 kHz.

Availability

IRS2109C is available at Aetrix Electronics and suitable for brushless DC motor control, industrial inverters, and resonant DC-DC converters requiring stable component supply and long-term production continuity.

Supply support for IRS2109C 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 automotive, industrial, and energy-efficient systems.

The IRS2109C belongs to Infineon's high-voltage gate driver product line, designed specifically for robust, high-efficiency half-bridge power stages in motor drives and switched-mode power supplies.

FAQ

What is the maximum recommended switching frequency for IRS2109C?

The IRS2109C supports PWM frequencies up to 500 kHz, limited primarily by its 200 ns propagation delay and ±2 A output drive strength. At 400–500 kHz, gate charge time for typical 1000 pF loads remains under 100 ns, ensuring adequate MOSFET turn-on margin while maintaining thermal stability in SOIC-8EP packaging.

Can IRS2109C drive IGBTs directly?

Yes - IRS2109C can drive medium-power IGBTs with gate charge ≤150 nC, provided gate resistor values are selected to limit peak current within the ±2 A output rating. Its 600 V high-side rating and 200 ns propagation delay make it suitable for 600 V-class IGBT half-bridges in motor drives up to 5 kW.

Is an external bootstrap diode required?

No - the IRS2109C includes an internal bootstrap diode. The VBS pin connects directly to the bootstrap capacitor; no external diode is needed. However, a low-ESR ceramic capacitor (≥0.1 µF) must be placed close to VBS and VS pins to maintain stable high-side supply during switching transitions.

Does IRS2109C support 3.3 V logic inputs?

Yes - the IN and SD inputs are TTL/CMOS compatible with thresholds of 2.0 V (VIH min) and 0.8 V (VIL max), fully supporting 3.3 V microcontroller interfaces without level-shifting. Input hysteresis of 0.3 V prevents noise-induced mis-triggering in electrically noisy motor drive environments.