IR2128SPBF - 600V High-Side/Low-Side MOSFET/IGBT Driver | Infineon
MPN: IR2128SPBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.62 | $1,620.00 |
IR2128SPBF Overview
A gate driver IC is a power management semiconductor that translates low-power control signals from a microcontroller or analog controller into the high-current, high-voltage drive signals required to switch discrete power transistors such as MOSFETs and IGBTs. In the system hierarchy, a gate driver sits between a logic-level controller (MCU, FPGA, analog PWM controller) and the power stage (MOSFET, IGBT, SiC, GaN switch), and is itself a member of the broader power management IC family that includes voltage regulators, supervisors, and motor drivers. The IR2128SPBF belongs specifically to the high-side/low-side (half-bridge) driver subcategory.
Key features include dV/dt immunity, negative transient voltage tolerance, fully operational capability to +600V, and integrated current sensing. The 8-pin SOIC package provides a compact footprint suitable for space-constrained power designs. The inverting input logic simplifies implementation in systems where the controller output is active-high but the power stage requires active-low drive signals.
The IR2128SPBF utilizes Infineon's proprietary HVIC (High-Voltage Integrated Circuit) process technology with latch-immune CMOS construction. This combination enables monolithic integration of high-voltage level-shifting with low-voltage logic on a single die, eliminating the need for external bootstrap components in some configurations. The current-sensing capability allows the driver to monitor load current directly, simplifying protection circuit design in motor drive and power conversion applications.
Typical applications include motor drive circuits, automotive power systems, switch-mode power supplies (SMPS), and high-voltage DC-DC converters. The wide operating voltage range and high-voltage tolerance make it particularly suitable for industrial motor control, where switching transients commonly exceed 500V. The automotive variant (IR21271) extends the gate drive range for IGBT applications in vehicles.
When designing with this device, ensure proper PCB layout to minimize parasitic inductance in the gate drive loop. Use a low-impedance gate return path and place the driver as close to the power switch as possible. The supply bypass capacitor must be located within 5mm of the VCC pin to suppress switching transients.
This page synthesizes distributor pricing, drop-in SOIC-8 alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for IR2128SPBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with IR2128SPBF (same form factor and footprint) — differing in Package, Input Logic Compatibility, RoHS Status, Configuration, Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
IR2127SPBF
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →IR21271SPBF
✅ Drop-In✓ In Stock
$0.71 / Unit
View Datasheet →IR2128S
✅ Drop-In📋 Reference alternative (not in catalog)
IR2304SPBF
✅ Drop-In✓ In Stock
$0.48 / Unit
View Datasheet →IRS21867STRPBF
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →IR2128SPBF Maximum Ratings & Electrical Characteristics
| Driver Type | High-Side, Low-Side (Half-Bridge), Inverting |
| Number of Channels | 1 |
| Output Current | 0.5 A |
| Maximum Offset Voltage | 600 V |
| Supply Voltage Range | 10 V to 20 V |
| Propagation Delay | 150 ns (typical) |
| Logic Input Compatibility | CMOS / LSTTL (down to 3.3 V) |
| Gate Drive Range (Motor Drive) | 20 V (IR2127/IR2128) |
| dV/dt Immunity | Yes |
| Negative Transient Tolerance | Yes |
| Technology | HVIC and latch-immune CMOS |
| Current Sensing | Integrated (single channel) |
| Operating Temperature | -40 C to +125 C |
| Package | 8-SOIC (PDSO8) |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Yes (PbF suffix) |
| Configuration | Inverting input |
IR2128SPBF Pin Configuration
| Pin 1 | VCC — Logic supply voltage (10V-20V) |
| Pin 2 | IN — Logic input (inverting for IR2128) |
| Pin 3 | GND — Logic ground |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | VS — High-side floating supply return |
| Pin 6 | VB — High-side floating supply |
| Pin 7 | HO — High-side gate drive output |
| Pin 8 | NC — Not connected (per datasheet) |
Typical Applications
IR2128SPBF is suitable for 6 applications: Industrial Motor Drive Inverters, Switch-Mode Power Supplies (SMPS), Automotive 12V/48V Power Systems, High-Voltage DC-DC Converters, Solar Inverters and Renewable Energy, Uninterruptible Power Supplies (UPS).
Industrial Motor Drive Inverters
The IR2128SPBF drives IGBTs and MOSFETs in three-phase variable-frequency drives for industrial motor control. Its 600V high-side floating supply rating handles 480V AC bus voltages with margin, while the 0.5A gate drive output and 150ns propagation delay support PWM frequencies up to 20 kHz. The proprietary HVIC technology with dV/dt immunity rejects switching transients common in motor cables, ensuring reliable half-bridge switching without false triggering.
Recommended
Switch-Mode Power Supplies (SMPS)
The IR2128SPBF drives the primary-side power switch in isolated half-bridge and push-pull SMPS topologies. Its 600V rating covers 400V DC bus designs, and the inverting input simplifies optocoupler-driven control interfaces. With 0.5A gate drive current and 150ns propagation delay, it supports hard-switched converters at frequencies where MOSFET switching losses dominate. The integrated current sensing enables cycle-by-cycle current-mode control without external sense amplifiers.
Recommended
Automotive 12V/48V Power Systems
The IR2128SPBF (and its automotive-qualified IR21271 variant) drives 12V and emerging 48V automotive loads including DC-DC converters, motor controllers, and solenoid drivers. The IR2128SPBF itself provides the 600V rating needed for 48V bus systems, with dV/dt immunity and negative transient tolerance protecting against load-dump transients. The 8-SOIC package supports space-constrained under-hood ECU layouts, and -40 C to +125 C operation covers automotive temperature grades.
Recommended
High-Voltage DC-DC Converters
The IR2128SPBF drives the high-side MOSFET in boost, buck-boost, and totem-pole PFC converters operating from 400V-600V DC buses. The 0.5A gate drive output supports most 600V-class MOSFETs, and the inverting input enables direct interface with PFC controller ICs that produce active-low drive signals. With 150ns propagation delay and matched turn-on/turn-off timing, it minimizes duty-cycle distortion in CCM PFC stages.
Recommended
Solar Inverters and Renewable Energy
The IR2128SPBF drives IGBT modules in residential and small-commercial solar inverters where 600V rating covers single-phase grid-tie applications. Its dV/dt immunity rejects the high slew rates of IGBT switching, and the integrated current sensing enables overcurrent protection without external shunt amplifiers. The 8-SOIC package and 0.5A drive current support inverter designs up to several kW power levels when multiple devices are used in parallel output stages.
Recommended
Uninterruptible Power Supplies (UPS)
The IR2128SPBF drives the IGBT inverter stage in on-line and line-interactive UPS systems converting battery DC to AC mains. Its 600V rating supports 220V AC output designs, and the 150ns propagation delay ensures tight control of the inverter PWM for low THD output. The inverting input interfaces directly with digital signal controller (DSC) PWM outputs, simplifying firmware development for grid synchronization.
Recommended
Recommended Products Summary
Engineering reference data for IR2128SPBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IR2127SPBF | IR21271SPBF | IR2128S | IR2304SPBF | IRS21867STRPBF |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Driver Type | High-Side, Inverting | High-Side, Non-Inverting | High-Side, Inverting, Automotive | High-Side, Inverting (legacy) | Half-Bridge, Non-Inverting | Half-Bridge, Non-Inverting |
| Output Current | 0.5 A | 0.5 A | 0.5 A | 0.5 A | 0.6 A | 2.0 A |
| Maximum Offset Voltage | 600 V | 600 V | 600 V | 600 V | 600 V | 600 V |
| Supply Voltage Range | 10 V to 20 V | 10 V to 20 V | 10 V to 20 V | 10 V to 20 V | 10 V to 20 V | 10 V to 20 V |
| Propagation Delay | 150 ns | 150 ns | 150 ns | 150 ns | 130 ns | 200 ns |
| Automotive Grade (AEC-Q100) | No | No | Yes | No | No | No |
Key Differentiators
- Integrated current sensing eliminates external shunt amplifier (vs Generic high-side drivers without current sense)
- Automotive-qualified variant available in same package (vs IR2127SPBF)
- Inverting logic input simplifies optocoupler interface (vs IR2127SPBF (non-inverting))
Design Notes
Place the VCC bypass capacitor (0.1uF ceramic) within 5mm of the VCC pin (pin 1) and the bootstrap capacitor (0.1uF-1uF) within 5mm of the VB pin (pin 6). Use a low-impedance ground plane on the GND pin (pin 3) to minimize parasitic inductance in the gate drive return path. Keep the high-side switching loop (VB-HO-VS) area as small as possible to reduce voltage overshoot and EMI.
Route the gate drive output (HO, pin 7) directly to the gate of the power switch with the shortest possible trace, ideally less than 25mm. Add a 10 ohm-47 ohm gate resistor close to the driver output to dampen ringing and limit peak gate current. Keep the high-voltage traces (VS, VB) physically separated from the low-voltage logic traces (IN, GND) by at least 3mm to maintain creepage and reduce noise coupling.
The IR2128SPBF in 8-SOIC package has a thermal resistance of approximately 150 C/W junction-to-ambient. At maximum switching frequency (20 kHz) driving a large IGBT (Qg=100nC), the gate drive power dissipation can reach 20mW, resulting in negligible self-heating. However, ensure the PCB layout provides adequate copper area for the GND pin (pin 3) thermal pad connection to keep junction temperature below 125 C in high-ambient-temperature environments.
Do not exceed the 600V high-side floating supply rating - this is the most common failure mode in motor drive applications. Ensure the bootstrap capacitor is sized correctly: Cboot >= Qg / (delta_V), where delta_V is the allowed voltage droop during the high-side on-time. For a typical IGBT with Qg=100nC and delta_V=1V, use Cboot >= 0.1uF. Also verify the bootstrap diode has a reverse voltage rating exceeding the high-side supply voltage (600V or higher).
The IN pin (pin 2) is compatible with 3.3V CMOS or LSTTL logic, but the input threshold is referenced to the logic ground (GND, pin 3), not the high-side return (VS, pin 5). Ensure the input signal source shares the same ground reference as the driver's GND pin to avoid false triggering. If the input signal originates from a different ground domain (e.g., isolated control), use a logic isolator or optocoupler between the signal source and the IN pin.
Compliance Information
RoHS compliant per Infineon product page (PbF suffix indicates lead-free). Not AEC-Q100 qualified - choose IR21271SPBF for automotive applications requiring AEC-Q100 qualification.
