IRS2308SPBF - 600V Half-Bridge Gate Driver IC | Infineon
MPN: IRS2308SPBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.34 | $134.00 |
| 500 | $1.08 | $540.00 |
| 1,000 | $0.92 | $920.00 |
IRS2308SPBF Overview
A gate driver IC is a specialized high-current buffer stage that sits between a low-power control signal (such as a microcontroller PWM output) and the gate of a power switching device. By providing level shifting, voltage translation, and high-current drive capability, gate drivers overcome the limitations of directly driving MOSFETs or IGBTs from logic-level outputs. The IRS2308SPBF belongs to the half-bridge gate driver category within the broader power management semiconductor family, designed specifically for driving N-channel MOSFETs or IGBTs in a half-bridge (or per-phase) configuration.
Key features include an integrated bootstrap diode for the high-side supply, 540 ns typical propagation delay, deadtime control to prevent shoot-through, and matched propagation delays between channels. The output drivers feature a high pulse current buffer stage designed for minimum driver cross-conduction. The floating channel can be used to drive an N-channel power MOSFET or IGBT in the high side configuration which operates up to 600 V, making it well-suited for offline motor drive and SMPS applications.
The architecture combines a level-shifted high-side channel with a ground-referenced low-side channel, both driven from a single PWM input (HIN/LIN). An integrated deadtime generation circuit prevents simultaneous turn-on of both outputs. The bootstrap technique supplies the high-side driver from a charge-pump diode and capacitor referenced to the switch node, eliminating the need for an isolated DC/DC converter.
Typical applications include three-phase motor drives, DC/AC inverters, half-bridge and full-bridge SMPS topologies, motor control in industrial automation, and Class D audio amplifiers. The wide 600V blocking voltage supports universal input PFC front ends and 380-480V industrial bus systems.
When designing with the IRS2308SPBF, ensure adequate VCC bypass capacitance (typically 0.1uF ceramic in parallel with an electrolytic) placed close to the VCC and COM pins. The bootstrap capacitor value must be sized to maintain VBS above the UVLO threshold under worst-case duty cycle and switching frequency conditions.
This page synthesizes distributor pricing from DigiKey, Mouser, and Arrow, drop-in compatible alternatives in the SOIC-8 footprint, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for IRS2308SPBF — 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 IRS2308SPBF (same form factor and footprint) — differing in Package, Configuration, Input Logic Compatibility, Input Type, Number of Outputs.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
IRS2308STRPBF
✅ Drop-In✓ In Stock
$0.54 / Unit
View Datasheet →IRS2308SPBF-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
IR2104SPBF
✅ Drop-In✓ In Stock
$0.41 / Unit
View Datasheet →IR2104STRPBF
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.59 / Unit
View Datasheet →IRS21867STRPBF
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →IRS2308SPBF Maximum Ratings & Electrical Characteristics
| Driver Configuration | Half-Bridge (High Side + Low Side, dependent channels) |
| Number of Outputs | 2 (High Side / Low Side) |
| Peak Output Current | 600 mA (source/sink) |
| Output Voltage (High Side) | Up to 600 V |
| Logic Supply Voltage (VCC) | 10 V to 20 V |
| Bootstrap Supply Voltage (VBS) | 10 V to 20 V |
| Propagation Delay (Typical) | 540 ns |
| Input Logic Compatibility | CMOS / LSTTL, 3.3 V logic compatible |
| Input Type | Non-Inverting |
| Operating Temperature Range | -40 C to +125 C |
| Package / Case | 8-SOIC (SO-8) |
| Mounting Type | Surface Mount |
| Number of Pins | 8 |
| Lead-Free / RoHS | Lead-Free (PbF suffix), RoHS compliant |
| UVLO Protection | Yes (VCC and VBS) |
| Integrated Bootstrap Diode | Yes |
IRS2308SPBF Pin Configuration
| Pin 1 | VCC — Logic and low-side driver supply voltage (10-20V) |
| Pin 2 | HIN — Logic input for high-side and low-side output (non-inverting, dependent) |
| Pin 3 | NC — Not connected (per datasheet) |
| Pin 4 | COM — Low-side return / ground |
| Pin 5 | LO — Low-side gate drive output |
| Pin 6 | VS — High-side floating supply return (switch node) |
| Pin 7 | HO — High-side gate drive output |
| Pin 8 | VB — High-side floating supply (bootstrap) |
Typical Applications
IRS2308SPBF is suitable for 6 applications: Three-Phase Motor Drive (Industrial VFD), Half-Bridge SMPS (Power Supply), Solar Inverter (DC-AC Stage), Class D Audio Amplifier, DC-AC Inverter for UPS / Induction Heating, EV Battery Management / Auxiliary DC-DC.
Three-Phase Motor Drive (Industrial VFD)
The IRS2308SPBF is well-suited to drive the three half-bridge legs of a 400-480V AC variable-frequency drive (VFD). With 600 V high-side blocking voltage and 600 mA peak output current, it directly drives N-channel IGBTs or MOSFETs up to several hundred amperes. The dependent input allows simple PWM control from a DSP or microcontroller, while the integrated bootstrap diode simplifies the high-side supply network and reduces BOM. Design tip: select a bootstrap capacitor value (typically 1-10 uF ceramic + bulk) sufficient to maintain VBS above UVLO during the worst-case low-side on-time at the minimum switching frequency.
Recommended
Half-Bridge SMPS (Power Supply)
The IRS2308SPBF drives the primary-side half-bridge in a switch-mode power supply operating from universal AC input (85-265 VAC). The 600V rating provides ample margin for rectified 380-400 VDC bulk rails, and the dependent input accepts a single PWM control signal. The 540 ns propagation delay is acceptable for SMPS switching frequencies up to 100-200 kHz. The integrated bootstrap diode eliminates an external component, reducing PCB area and BOM cost. Compared to IR2104 (130 mA drive), the IRS2308SPBF can directly switch larger MOSFETs without a buffer stage.
Recommended
Solar Inverter (DC-AC Stage)
In string and micro-inverter DC-AC stages, the IRS2308SPBF drives the IGBT or MOSFET half-bridge leg at switching frequencies up to 50 kHz. The 600V blocking voltage handles 600-1000V DC photovoltaic input rails, and the 600 mA peak current charges MOSFET gate capacitances quickly for low switching loss. The dependent input is compatible with solar MPPT controller PWM outputs, and the integrated bootstrap diode reduces BOM count for cost-sensitive residential PV inverter designs. The wide -40 to +125 C operating range supports outdoor inverter enclosures.
Recommended
Class D Audio Amplifier
The IRS2308SPBF serves as the output-stage gate driver in a half-bridge Class D audio amplifier, switching the audio-output MOSFETs at 200-500 kHz PWM. Low propagation delay (540 ns) and matched channel delay preserve audio fidelity and minimize dead-time distortion. The dependent input accepts a single modulator PWM signal, simplifying the analog front-end. The 600V rating is over-specified for typical 50-200V audio rails, but enables use in high-power professional and subwoofer amplifier designs. Integrated bootstrap diode simplifies the high-side supply.
Recommended
DC-AC Inverter for UPS / Induction Heating
The IRS2308SPBF drives the half-bridge leg in uninterruptible-power-supply (UPS) DC-AC inversion stages and induction-heating resonant tanks operating from 380-480V rectified bus. The 600V rating handles industrial bus voltages with margin, and the 600 mA peak current drives medium-frequency IGBTs. The dependent input works with simple PWM controllers, while the integrated bootstrap diode and UVLO protection simplify reliable start-up under varying load conditions. The SOIC-8 footprint fits compact UPS PCB layouts.
Recommended
EV Battery Management / Auxiliary DC-DC
In 400V-800V electric-vehicle battery systems, the IRS2308SPBF drives the high-voltage half-bridge in auxiliary DC-DC converters and on-board chargers. The 600V blocking voltage supports 400V systems with margin and 800V systems with derating, and the -40 to +125 C automotive temperature range suits under-hood environments. The IRS2308SPBF-Q1 variant is AEC-Q100 qualified for automotive use. The integrated bootstrap diode and dependent input simplify the converter control loop, and the SOIC-8 footprint is compact for chassis-mounted ECUs.
Recommended
Recommended Products Summary
Engineering reference data for IRS2308SPBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IRS2308STRPBF | IRS2308SPBF-Q1 | IR2104SPBF | IR2104STRPBF | 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 |
| Peak Output Current | 600 mA | 600 mA | 600 mA | 130 mA (-78%) | 130 mA (-78%) | 4 A |
| High-Side Blocking Voltage | 600 V | 600 V | 600 V | 600 V | 600 V | 600 V |
| VCC Supply Range | 10-20 V | 10-20 V | 10-20 V | 10-20 V | 10-20 V | 10-20 V |
| Integrated Bootstrap Diode | Yes | Yes | Yes | No | No | Yes |
| Input Configuration | Dependent (single PWM) | Dependent (single PWM) | Dependent (single PWM) | Dependent (single PWM) | Dependent (single PWM) | Independent (HIN + LIN) |
| Automotive Grade (AEC-Q100) | No | No | Yes | No | No | No |
Key Differentiators
- Higher peak output current than IR2104 family in same SOIC-8 footprint (vs IR2104SPBF)
- Integrated bootstrap diode eliminates external component (vs IR2104SPBF)
- Automotive-qualified -Q1 variant available in same SOIC-8 (vs IRS2308SPBF (standard))
Design Notes
VCC and VBS supply design: Place a 0.1 uF ceramic bypass capacitor as close as physically possible to the VCC pin (pin 1) and COM pin (pin 4). Add a 1-10 uF bulk capacitor in parallel for switching transient support. The VBS bootstrap supply requires a high-side capacitor (typically 1-10 uF ceramic) connected between VB (pin 8) and VS (pin 6). The capacitor value must be sized so that VBS does not drop below the UVLO threshold during the longest low-side on-time at the minimum switching frequency - undersizing causes high-side lockout and missing PWM pulses.
PCB layout: Keep the gate-drive output traces (HO, LO) short and direct to minimize parasitic inductance, which causes ringing and possible gate-voltage overshoot. Use a ground plane under the IC and tie COM (pin 4) and the low-side MOSFET source kelvin connection to the same ground island. Keep the VS trace short to limit common-mode dv/dt injection into the level-shift circuit. The high-side switch-node trace should not run under the IC to avoid capacitive coupling to the floating supply.
Thermal management: The SOIC-8 has a theta_JA of approximately 100-120 C/W (depends on copper area and PCB stack-up). At 600 mA peak with 50% duty cycle and 50 kHz switching, gate-driver dissipation is typically 100-300 mW, which is well within SOIC-8 capability without a heatsink. For sustained high-frequency (>200 kHz) operation driving large MOSFETs, derate based on actual gate-charge loss: P_loss = VCC * Qg * f_sw.
Common pitfalls: (1) Forgetting the bootstrap capacitor - causes high-side not to turn on. (2) Insufficient deadtime between LO and HO transitions - causes shoot-through in the half-bridge. The IRS2308SPBF dependent input generates HO and LO simultaneously without deadtime, so the system controller must add deadtime, OR add gate-source resistors to slow switching edges. (3) Exceeding VS negative transient rating during low-side turn-off with inductive loads - use a low-side gate resistor or external schottky clamp on VS to COM.
Compliance Information
PbF suffix indicates lead-free and RoHS compliant. AEC-Q100 qualified variant is IRS2308SPBF-Q1 (not the base part). Halogen-free status not stated in provided data.
