IRS2109STRPBF - 600V Half-Bridge Gate Driver SOIC-8 | Infineon
MPN: IRS2109STRPBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.72 | $1.72 |
| 10 | $1.43 | $14.30 |
| 100 | $1.07 | $107.00 |
| 500 | $0.86 | $430.00 |
| 1,000 | $0.71 | $710.00 |
| 2,500 | $0.61 | $1,525.00 |
Drop-in alternatives for IRS2109STRPBF β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
IRS2109SPBF
β Drop-Inπ Reference alternative (not in catalog)
IRS21091STRPBF
β Drop-Inπ Reference alternative (not in catalog)
IRS21064STRPBF
β Drop-Inπ Reference alternative (not in catalog)
L6387E
β Drop-Inπ Reference alternative (not in catalog)
IRS2008STRPBF
β Drop-Inβ In Stock
$0.334 / Unit
View Datasheet βIRS2109STRPBF Maximum Ratings & Electrical Characteristics
| Configuration | Half-Bridge |
| Input Type | Non-Inverting, Single Input |
| Number of Drivers | 2 (high-side + low-side) |
| High-Side Voltage (VOffset) | 600 V maximum |
| Supply Voltage (VCC) | 10 V to 20 V |
| Logic Input Voltage | Compatible with 3.3 V and 5 V logic |
| Source Current (typical) | 290 mA |
| Sink Current (typical) | 600 mA |
| Propagation Delay (ton/off) | 540 ns (typical) |
| Deadtime | 540 ns (fixed, internal) |
| Operating Temperature | -40C to +125C |
| Package | 8-SOIC (3.90 mm body width) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life at <30C / 85% RH) |
| Lead-Free / RoHS | Yes (Pb-free suffix 'PBF') |
| Packaging | Tape and Reel (TR suffix) |
IRS2109STRPBF Pin Configuration
| Pin 1 | VCC β Logic and low-side driver supply voltage (10 V to 20 V) |
| Pin 2 | HIN β High-side logic input (3.3 V/5 V CMOS compatible) |
| Pin 3 | LIN/SD β Low-side logic input / shutdown (active low) |
| Pin 4 | GND β Logic and low-side driver ground |
| Pin 5 | LO β Low-side gate drive output |
| Pin 6 | VS β High-side floating supply return (switch node) |
| Pin 7 | HO β High-side gate drive output |
| Pin 8 | VBS β High-side floating supply (bootstrap supply) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
IRS2109STRPBF is suitable for 7 applications: BLDC / PMSM Motor Drive Inverter, Switch-Mode Power Supply (SMPS) Half-Bridge, Solar Microinverter, Induction Heating Cooktop Inverter, Class D Audio Amplifier Output Stage, Uninterruptible Power Supply (UPS) Inverter, HID Lighting Ballast.
BLDC / PMSM Motor Drive Inverter
The IRS2109STRPBF drives the high-side and low-side MOSFETs in each phase of a 3-phase brushless DC (BLDC) or permanent magnet synchronous motor (PMSM) inverter. Its 600 V high-side rating covers 110/220 VAC-derived bus voltages up to ~400 VDC, and the 290 mA source / 600 mA sink drive strength switches typical sub-100A motor MOSFETs cleanly at 15-20 kHz PWM. Three IRS2109STRPBF devices (one per phase) form a complete 3-phase gate-drive stage when paired with an MCU or DSP running a Field-Oriented Control (FOC) algorithm. The fixed 540 ns deadtime prevents shoot-through at high duty cycles, critical for protecting the half-bridge switches during regenerative braking transitions.
Recommended
Switch-Mode Power Supply (SMPS) Half-Bridge
In a half-bridge or full-bridge SMPS topology, the IRS2109STRPBF provides the level-shifting and gate-drive amplification needed to switch the primary-side MOSFETs or IGBTs from a low-voltage PWM controller. Its floating high-side driver tolerates the rapidly switching half-bridge midpoint (VS pin) and the negative transients that occur when the primary-side switches commutate. With 540 ns propagation delay and fixed deadtime, the part operates reliably up to 100 kHz in telecom and server SMPS designs. The SOIC-8 footprint enables compact half-bridge layouts where board area is at a premium, such as 1U server power supplies and industrial DIN-rail converters.
Recommended
Solar Microinverter
In a photovoltaic microinverter, the IRS2109STRPBF drives the half-bridge or full-bridge unfolding stage that converts DC panel voltage to grid-compatible AC. The 600 V high-side rating handles 600 V string voltages with adequate margin, while the soft turn-on feature reduces EMI emissions that could otherwise couple into sensitive grid-monitoring circuitry. Microinverter designs benefit from the part's compact 8-SOIC footprint, which simplifies the densely packed gate-drive and power sections on a small PCB. The fixed 540 ns deadtime is well-matched to switching frequencies in the 20-50 kHz range used for residential solar microinverters targeting 200-600 W output power.
Recommended
Induction Heating Cooktop Inverter
The IRS2109STRPBF drives the resonant half-bridge or full-bridge inverter in an induction heating cooktop. The 600 V high-side rating handles rectified 220 VAC mains (peak ~310 V) plus resonant overshoot, while the 290/600 mA source/sink drive current switches IGBTs in the 20-50 A class typically used for 1.5-2 kW induction heating coils. The fixed 540 ns deadtime prevents shoot-through during the zero-voltage-switching (ZVS) transitions that occur in resonant induction heating topologies. The 8-SOIC package fits compact cooktop control boards, and the wide 10-20 V VCC range allows direct operation from a 15 V auxiliary supply.
Recommended
Class D Audio Amplifier Output Stage
In a Class D audio amplifier, two IRS2109STRPBF devices drive the BTL (bridge-tied load) output stage that delivers amplified audio to the speaker. The 600 V rating is overkill for typical 30-50 V audio rails but provides headroom for automotive 42 V or industrial 96 V Bus applications. The 290/600 mA source/sink asymmetry accelerates turn-off to minimize dead-time-induced distortion, an important consideration for THD performance in audio amplifiers. The fixed 540 ns internal deadtime simplifies the modulator design and ensures symmetric dead-time insertion across both half-bridges of the BTL output stage, reducing even-order harmonic distortion at the speaker terminals.
Recommended
Uninterruptible Power Supply (UPS) Inverter
The IRS2109STRPBF drives the half-bridge or three-phase inverter in an online UPS that converts battery DC bus voltage to grid-frequency AC. The 600 V high-side rating handles the 192-400 V DC bus of typical 1-10 kVA UPS systems, and the 290/600 mA drive current switches IGBT modules in the 30-75 A class used for sub-10 kVA designs. The fixed 540 ns deadtime prevents cross-conduction during battery-to-AC and AC-to-battery mode changes when the inverter is momentarily reconfigured. Three IRS2109STRPBF devices drive a 3-phase UPS inverter, while two suffice for split-phase 120/240 V residential UPS designs.
Recommended
HID Lighting Ballast
In a high-intensity-discharge (HID) lighting ballast for street lamps, projectors, or automotive headlights, the IRS2109STRPBF drives the full-bridge inverter that provides the high-voltage ignition pulse and steady-state AC drive to the lamp. The 600 V rating handles the 600 V ignition pulse required to strike HID arc tubes, while the 290/600 mA drive strength switches the IGBTs that commutate the resonant LC network. The compact 8-SOIC package fits the constrained PCB area of a street-lamp ballast housing, and the wide -40C to +125C operating temperature range accommodates outdoor cold-weather operation down to -30C ambient.
Recommended
Recommended Products Summary
Engineering reference data for IRS2109STRPBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IRS2109SPBF | IRS21091STRPBF | IRS21064STRPBF | L6387E | IRS2008STRPBF |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | STMicroelectronics | Infineon |
| Package | 8-SOIC | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) |
| Configuration | Half-Bridge | Half-Bridge | Half-Bridge | High/Low-side (independent inputs) | Half-Bridge | Half-Bridge |
| High-Side Voltage (VOffset) | 600 V | 600 V | 600 V | 600 V | 600 V | 200 V |
| Source Current (typ) | 290 mA | 290 mA | 290 mA | 290 mA | 270 mA | 290 mA |
| Sink Current (typ) | 600 mA | 600 mA | 600 mA | 600 mA | 400 mA | 600 mA |
| Propagation Delay (typ) | 540 ns | 540 ns | 520 ns | 680 ns | 560 ns | 540 ns |
| Internal Deadtime | 540 ns (fixed) | 540 ns (fixed) | 540 ns (fixed) | None (external) | 540 ns (fixed) | 540 ns (fixed) |
| Logic Inputs | Single PWM input (HIN, LIN/SD) | Single PWM input | Single PWM input | Independent HIN + LIN | Single PWM input | Single PWM input |
| Unit Price (1 pc, as of 2026-09-13) | $1.72 | $1.85 (approx) | $1.95 (approx) | $2.20 (approx) | $1.40 (approx) | $1.30 (approx) |
Key Differentiators
- Single-PWM-input half-bridge with integrated 540 ns deadtime (vs IRS21064STRPBF)
- Verified cross-brand drop-in replacement path (vs L6387E (STMicroelectronics))
- 600 V high-side rating covers 110/220 VAC-derived bus systems (vs IRS2008STRPBF)
- Lower source current enables softer turn-on and lower EMI (vs IRS21091STRPBF)
Design Notes
Bootstrap capacitor sizing for IRS2109STRPBF: select CBOOT so that VBS remains above the UVLO threshold (typically 8-9 V) during the high-side on-time. For a 50 kHz half-bridge with 10% minimum duty cycle, CBOOT must supply Qg(total) + IC(quiescent) over the high-side on-time. Estimated: with Qg = 50 nC and IQBS = 50 uA, at 50 kHz with 2 us minimum on-time: CBOOT_min = (50 nC + 50 uA x 2 us) / (VBS_min_droop), giving at least 470 nF for 1 V droop margin. Use ceramic X7R or X5R rated to 25 V minimum. Place CBOOT physically close to the VBS and VS pins with wide traces to minimize parasitic inductance that would otherwise ring the bootstrap rail.
PCB layout for the IRS2109STRPBF half-bridge stage: keep the high-side HO-to-gate trace and the low-side LO-to-gate trace short and direct (< 25 mm), with no vias in series. Place the VCC bypass (>= 1 uF ceramic + 100 nF HF) within 5 mm of pin 1. The VS trace (switch node) must be wide to handle pulsed currents and should be surrounded by a ground pour to contain EMI. Separate the analog ground (pin 4 GND) from the power-stage ground; tie them together at a single point under the IC. The exposed pad on the SOIC-8 is internally connected to pin 4 GND and should be soldered to a 5x5 mm copper island for thermal relief.
Common pitfalls with the IRS2109STRPBF: (1) Do not leave VBS floating - the high-side will not turn on without a charged bootstrap capacitor and the part will appear 'dead'. (2) The high-side output HO will not respond to HIN until VBS rises above UVLO; allow sufficient startup time (typically 1-10 us depending on CBOOT and VCC). (3) The LIN/SD pin (pin 3) is a dual-function pin - in shutdown mode the low-side output is forced off; ensure firmware does not accidentally drive it low during normal operation. (4) The part has no internal deadtime hardware for HIN/LIN synchronization - the fixed deadtime is only between internal HO and LO; external anti-cross-conduction timing is the designer's responsibility when cascading multiple chips. (5) Do not exceed VCC of 20 V absolute maximum - transients above 22 V will damage the part.
Thermal management for the IRS2109STRPBF in 8-SOIC: the package dissipates ~0.5 W maximum (limited by the silicon and the package thermal resistance of theta_JA ~150 C/W on a standard JEDEC 4-layer PCB). At 1 W dissipation, junction temperature rises ~150 C above ambient, easily exceeding the 150 C absolute maximum junction rating. For high-frequency (> 100 kHz) applications with sustained switching, add a 10x10 mm copper island under the exposed pad to drop theta_JA to ~80 C/W. For applications above 50 kHz with large gate-charge MOSFETs (Qg > 100 nC), derate the part or upgrade to a larger package (IRS21091 with 8-DIP or IRS2113 in 14-SOIC).
Compliance Information
Pb-free finish indicated by 'PBF' suffix per Infineon part numbering. RoHS compliance confirmed in distributor listings. AEC-Q100 qualification: not qualified in Infineon catalog; for AEC-Q100 qualified automotive half-bridge drivers, consider the IRS2003SPBF (AEC-Q100) in 8-SOIC. Halogen-free status not explicitly listed in distributor data.
