IRS4427STRPBF - 25V Dual Low-Side Gate Driver, 3.3A | Infineon
MPN: IRS4427STRPBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.84 | $1.84 |
| 10 | $1.66 | $16.60 |
| 100 | $1.48 | $148.00 |
| 500 | $1.32 | $660.00 |
| 1,000 | $1.18 | $1,180.00 |
| 2,500 | $1.05 | $2,625.00 |
Drop-in alternatives for IRS4427STRPBF 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:
IRS4427SPBF
β Drop-Inπ Reference alternative (not in catalog)
IR4427STRPBF
β Drop-Inπ Reference alternative (not in catalog)
IRS4428STRPBF
β Drop-Inβ In Stock
$0.85 / Unit
View Datasheet βUCC27624DR
β Drop-Inπ Reference alternative (not in catalog)
UCC27624QDRQ1
β Drop-Inπ Reference alternative (not in catalog)
MAX628CPA
β Drop-Inπ Reference alternative (not in catalog)
IRS4427STRPBF Maximum Ratings & Electrical Characteristics
| Configuration | Low-Side |
| Number of Drivers | 2 (dual) |
| Gate Drive Supply Voltage | 6 V to 20 V |
| Logic Supply Voltage | 3.3 V and 5 V compatible |
| Peak Source Current | 2.3 A |
| Peak Sink Current | 3.3 A |
| Propagation Delay | 50 ns (typical) |
| Input Type | CMOS Schmitt-triggered, non-inverting |
| Output Polarity | In phase with input |
| Operating Temperature | -40 C to +125 C |
| Package | 8-SOIC (DSO-8), 0.154" / 3.90 mm width |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Yes (PBF suffix indicates lead-free) |
| Packaging | Tape & Reel (TR) |
| UVLO Protection | Under-voltage lockout present |
| Maximum Junction Temperature | +150 C |
IRS4427STRPBF Pin Configuration
| Pin 1 | IN_A β Logic input for channel A (CMOS Schmitt-triggered, non-inverting) |
| Pin 2 | GND β Ground reference for input and output stages |
| Pin 3 | IN_B β Logic input for channel B (CMOS Schmitt-triggered, non-inverting) |
| Pin 4 | VCC β Gate-drive supply input, 6V to 20V |
| Pin 5 | OUT_B β Gate-drive output for channel B |
| Pin 6 | NC β No connect (not internally bonded) |
| Pin 7 | OUT_A β Gate-drive output for channel A |
| Pin 8 | NC β No connect (not internally bonded) |
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
IRS4427STRPBF is suitable for 6 applications: Synchronous Buck Converter Low-Side Drive, BLDC Motor Control H-Bridge Driver, Class-D Audio Amplifier Output Stage, Solenoid and Relay Driver Module, Power Supply OR-ing and Hot-Swap Controller, LED Driver and Lighting Power Stage.
Synchronous Buck Converter Low-Side Drive
The IRS4427STRPBF is well suited to drive both low-side MOSFETs in a multi-phase synchronous buck converter used in server, telecom, and industrial 12V-bus point-of-load regulators. Its 3.3A peak sink current quickly discharges the synchronous FET gate charge at switching frequencies up to 1 MHz, while the 50ns matched propagation delay between channels prevents cross-conduction in interleaved phases. Placed adjacent to the low-side FETs with a 1uF X7R bypass on VCC, it eliminates the need for two discrete single-channel drivers, reducing BOM cost and PCB area by approximately 40% compared with using two TC4420 equivalents.
Recommended
BLDC Motor Control H-Bridge Driver
In a three-phase brushless DC motor drive, the IRS4427STRPBF can be paired with high-side drivers to switch the low-side legs of each phase leg. Its 2.3A source / 3.3A sink output easily handles the gate charge of 40V-100V MOSFETs typically used in 24V or 48V BLDC systems. The dual independent channels allow one IRS4427 to drive two of the three low-side switches, and the matched 50ns delay keeps phase timing balanced. Designers should add gate-source 10kohm pull-downs to keep the FETs off during microcontroller startup.
Recommended
Class-D Audio Amplifier Output Stage
The IRS4427STRPBF drives the low-side power MOSFETs in a half-bridge Class-D audio amplifier, where its fast 50ns propagation delay and 3.3A sink current preserve switching-edge fidelity critical to audio quality. The dual-channel configuration drives both the left and right channel low-side FETs from a single SOIC-8, keeping the modulator-to-gate path short and minimizing dead-time distortion. With matched channel-to-channel delay, designers can keep total dead-time under 20ns for THD+N below 0.01%. Use a 1uF X7R bypass on VCC placed within 5mm of pin 4.
Recommended
Solenoid and Relay Driver Module
In industrial solenoid and relay driver modules, the IRS4427STRPBF switches 24V-48V DC loads with high inrush currents. Each output can source 2.3A to drive a logic-level power MOSFET that in turn switches the solenoid coil. Using both channels on one IC allows a compact dual-solenoid driver in just 9.8 mm2 of PCB area. The CMOS Schmitt-trigger inputs are immune to the voltage transients common on industrial 24V buses. Place a TVS across the solenoid for flyback protection and keep gate traces under 25mm.
Recommended
Power Supply OR-ing and Hot-Swap Controller
The IRS4427STRPBF drives the OR-ing MOSFETs in redundant 12V or 24V power supply designs, where fast turn-off during a fault prevents reverse current flow that could collapse the bus. Its 3.3A sink current rapidly switches off a 30V-100V OR-ing FET within 100ns, protecting downstream DC-DC converters. Two channels can drive two independent OR-ing paths in a dual-feed telecom rectifier. The wide 6V to 20V VCC range matches the auxiliary supply typically derived from the input bus.
Recommended
LED Driver and Lighting Power Stage
In high-brightness LED driving circuits using a buck or boost topology, the IRS4427STRPBF switches the low-side MOSFET at frequencies from 100 kHz to over 1 MHz, enabling small magnetics in compact architectural lighting. Its 50ns matched delay supports PWM dimming with sub-microsecond edge control for high-resolution dimming ratios above 10000:1. The SOIC-8 footprint suits the small form factor of MR16 and PAR-style retrofit lamps. Keep VCC bypass close to pin 4 and use 4-layer PCB for best thermal performance.
Recommended
Recommended Products Summary
Engineering reference data for IRS4427STRPBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IRS4427SPBF | IR4427STRPBF | IRS4428STRPBF | UCC27624DR | UCC27624QDRQ1 |
|---|---|---|---|---|---|---|
| Package | 8-SOIC (DSO-8) | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Brand | Infineon | Infineon - same | Infineon - same | Infineon - same | Texas Instruments - cross-brand | Texas Instruments - cross-brand |
| Peak Source Current | 2.3 A | 2.3 A | 2.3 A | 2.3 A | 4 A | 4 A |
| Peak Sink Current | 3.3 A | 3.3 A | 3.3 A | 3.3 A | 4 A | 4 A |
| Supply Voltage | 6 V to 20 V | 6 V to 20 V | 6 V to 20 V | 6 V to 20 V | 4.5 V to 26 V | 4.5 V to 26 V |
| Propagation Delay | 50 ns | 50 ns | 50 ns | 50 ns | ~25 ns | ~25 ns |
| Output Polarity | Both non-inverting | Both non-inverting | Both non-inverting | A inverted, B non-inverting | Both non-inverting | Both non-inverting |
| Automotive Qualified | No | No | No | No | No | Yes (AEC-Q100) |
Key Differentiators
- Higher sink current than competing low-side drivers in SOIC-8 (vs MAX628CPA)
- Matched 50ns propagation delay for synchronous switching (vs Discrete single-channel drivers (TC4420 x2))
- Wide 6V to 20V VCC range covers 12V and 15V industrial buses (vs MAX628CPA (4.5V to 18V))
Design Notes
Place a 1uF X7R ceramic bypass capacitor within 5 mm of the VCC pin (pin 4) to handle the high di/dt during MOSFET gate-charge transfer. Keep both VCC and GND traces wide (at least 0.5 mm) to minimize parasitic inductance that causes voltage ringing on VCC during fast switching. The exposed thermal pad is not present on this SOIC-8, but the wide GND pin (pin 2) provides most of the thermal dissipation path. A solid ground pour on the top layer directly under the IC further reduces ground bounce.
Do not leave the unused logic inputs floating - if a channel is not used, tie its IN pin to GND to prevent the output from randomly turning on due to noise pickup. The IRS4427 outputs are designed to drive MOSFET gates directly; do not place a series gate resistor larger than 10 ohm, or the driver's 3.3A sink capability will be wasted. The IRS4427 is non-inverting: input high produces output high. If you need an inverting channel, choose the IRS4428S variant instead.
Keep gate-drive traces short (under 25 mm) and route them away from switching-node traces to avoid capacitive coupling. The IRS4427 can source 2.3A peak, so the gate-drive trace resistance should be below 0.1 ohm to deliver full drive strength - use 0.2 mm copper or wider. If the driven MOSFET is more than 25 mm from the driver, add a 10 ohm gate resistor close to the driver and a 100 ohm resistor close to the gate to damp any trace resonance. Match the trace lengths of channel A and channel B outputs to preserve the matched propagation delay specification.
Compliance Information
RoHS and REACH compliance per Infineon product page. PBF suffix in MPN indicates lead-free plating. No AEC-Q100 qualification for the standard IRS4427STRPBF - use the TI UCC27624QDRQ1 for automotive designs. Halogen-free status not explicitly stated in verified web data.
